
Transactions
of the
New Zealand Institute.
Art. I.—The Maori Genius for Personification; with Illustrations of Maori Mentality.
[Read before the Wellington Philosophical Society, 18th May, 1920; received by Editor, 18th May, 1920; issued separately, 27th June, 1921.]
Of the singular mythopoetic concepts of the Maori folk, and their inner meaning, but little has been recorded. Such information on native myths as is contained in published works is in most cases a bare and hard translation, a soulless rendering of the original that ignores the vivifying spirit of the myth and the teachings that it contains. The spirit that prompted the evolution of such concepts is ignored, or perhaps not understood. The cause of this neglect lies in our ignorance of the mentality of uncultured man, and of his endeavours, in times long past, to seek and explain the origin of man, of natural phenomena, and many other things. In the peculiar plane of mental culture pertaining to such folk as the Maori, such matters are taught in the form of allegorical myths, and the most remarkable feature of such myths is that of personification. At some remote period the Maori strove to envisage primal causes, to grasp the origin of life, of manifestations, and of tangible objects. In these endeavours he trod the path followed by other folk of a similar culture stage, and his mental concepts, his myths, teem with personified forms and with illustrations of animatism. Personifications hinge upon animatism; for given the belief that all natural objects and phenomena possess an indwelling and vivifying spirit, then such a spirit is always apt to develop into a personified form. These primitive beliefs, coupled with that which looks upon all things as having come from a common source, contain the kernel of Maori mythology.

Though the primal being of Maori myth was Io, the supreme god, yet it was not taught that he begat any other being, but, in some unexplained manner, he caused earth and sky to exist. These are personified in Rangi, the Sky Parent, and Papa, the Earth Mother, and these were the primal parents. Their progeny amounted to seventy, all of whom were atua, or supernatural beings, and among them was Tane, or Tane the Fertilizer, he who fertilized the Earth Mother, and who was the origin of man, of birds, fish, vegetation, minerals, &c.
All things that exist, saith the Maori, are a part of Rangi and Papa, the primal parents—that is to say, they originated with them. Nothing belongs to the earth alone, or to the heavens alone; all sprang from that twain, even unto the heavenly bodies that gleam on high, and the heavenly bodies of all the other skies above the one we see: and all those bodies are worlds.
It was taught in the tapu school of learning that water is one of the chief constituents or necessities of life. It is moisture that causes growth in all things, other necessary agents being the sun, the moon, and the stars. Lacking moisture, all things would fail on earth, in the heavens, in the suns, the moons, and the stars of all realms. Clouds are mist-like emanations originating in the warmth of the body of the Earth Mother. All things possess warmth and cold, all things contain the elements of life and of death, each after the manner of its kind. It was Tane (personified form of the sun) and Tawhirimatea (personified form of winds) who sent back the mists to earth in the form of rain, as a means of cherishing and benefiting all things, for all things absorb moisture, each after the manner of its kind. Air, moisture, warmth, with various forms of sustenance, were the origin of the different forms around us, of the differences in such forms, as in trees, in herbage, in insects, birds, fish, stones, and soils; these things control such forms, and their growth. Hence death assails all things on earth, in the waters, in the sun, the moon, and the stars, in the clouds, mists, rain, and winds; all things contain the elements of decay, each after the manner of its kind.
Again, there is no universal mode of life and growth among all things; each lives, moves, or grows after the manner of its kind. All things possess a home, or receptacle, or haven of some kind, even as the earth is the home of many things. Even the wairua (spirit) has its abode in all things; there is no one thing that does not possess a spirit or soul, each after the manner of its kind. And inasmuch as each and every thing possesses an indwelling spirit or soul, then assuredly everything possesses the elements of warmth, each after the manner of its kind.
Now, as all things in all the realms of the numberless worlds are so constituted, it follows that the female element pertains to all things. Everything has its male and female element. Lacking the female element, nothing could survive, for by such, combined with moisture, do all things acquire form, vitality, and growth. Warmth is another element by means of which things are nurtured, and earth supports all. Even stone is formed of earth, moisture, and heat, and so endowed with life and growth after the manner of its kind.
Now, as such was the intention of Io (the supreme being)—that is, to arrange the functions of all things—even so the denizens of the heavens were appointed as guardians and directors of all things in all the heavens, on earth, and in the heavenly bodies. The twelve heavens are connected with the moons, but the sun is above all—it is the controller of all things.

Because all things are influenced by good and evil, by anger, jealousy, ambition, and because all follow some form of leadership, even so was it that guardians were appointed to watch each realm and report their condition to Io. And because of the differences that exist in all things, thus it is that all possess strength and weakness, goodness and evil, justness and lack of justice, each after the manner of its kind. Hence the guardians appointed as lords of the eleven heavens, of the earth, and of the spirit world. As these beings appointed as guardians are the salvation of all things by promoting their welfare, and are the emissaries of Io, thus it is that all eyes and all ears are directed to Io-matua, Io the Parent, for he is over all. He is the very acme of all welfare, of life, the head and summit of all things.
Since Io is the head of all things, all things become tapu through him, for without a lord nothing can become tapu, and so he is termed Io the Parent. Since he is termed Io the Parent, and represents the physical and spiritual welfare of all things, we see that the origin of such welfare is with the parent—that the parent holds and controls the welfare of everything. And since all things are centred in him, there is nothing left to be controlled or directed by any other god or being. All things in the twelve heavens, and in all realms, are thus gathered together before him. It is now clear that there exists nothing that does not come under his sway; all comes under Io the Parent.
All things possess a wairua (spirit, or soul), each after the manner of its kind. There is but one parent of all things, one god of all things, one master of all things, one soul of all things. Hence all things are one, and all emanated from Io the Eternal….
It may be thought that the foregoing remarks, which are translated passages from a speech made nearly sixty years ago by a teacher of the tapu school of learning, do not embody much information as to personifications, but they do illustrate Maori mentality. They show clearly how the superior minds of a comparatively uncultured folk broke free from shamanism and a belief in malignant deities, and strove to conceive a supreme being of nobler attributes; how the ancestors of the Maori, wrenching asunder the bonds of gross superstitions, and seeking light from the darkness of ages, pressed forward on the difficult path toward monothesim.
Anthropomorphic Personifications.
We have already seen that the heavens and the earth are personified in Rangi and Papa, the Sky Parent and the Earth Mother, from whom all things are descended. They were the primal parents, and appear frequently in Maori myth. The Earth Mother is spoken of as the mother of mankind, as the guardian and nurturer of her offspring. Not only did she give birth to man, but she also produces food for him, and gives shelter to his worn body when the soul leaves it at death. After the rebellion of their offspring the Sky Parent wished to punish them, but the Earth Mother said, “Not so; though they have erred, yet they are still my children. When death comes to them they shall return to me and I will shelter them; they shall re-enter me and find rest.” Hence the burial of the dead.
It is probable that many of the offspring of the primal parents are personifications—some certainly are, and these come under the title of departmental gods. All these primary offspring were males, and all were

supernatural beings. They numbered seventy, and each had his own province and functions.
The most important of these children of Rangi and Papa, though not the eldest, was Tane, and he was the personified form of the sun, as will be shown in another paper. But Tane was also the Fertilizer—he who fertilized the Earth Mother, and so produced man and vegetation; hence he also personifies the male element, as well as forests, trees, &c. His daughter was Hine-titama, the Dawn Maid, who, on being pursued by Tane (the sun), fled from him, and so passed into Night, the underworld and spirit world. She became ruler of that realm of Night. And ever Tane is begetting offspring (Dawn Maids), who pass through their brief life in the upper world and then retire to the realm of Night. For Hinetitama had said to Tane, “Return, O Tane, to bring forth cur children to the world of Light, while I remain here to receive them, for their welfare shall be my care.” And ever does the Queen of Night battle with dread Whiro of the world of Darkness in order to protect her charges.
Another daughter of Tane was Hine-rau-wharangi, she who personifies growth in the vegetable world.
Whilst Tane is the personified form of the sun, the common vernacular term for the sun is ra, Ra Kura and Tama-nui-te-ra being honorific names for the sun. Tane-te-waiora personifies sunlight. In our crude translations of native myths we render “Waiora a Tane” as “life-giving waters of Tane.” This is quite wrong; in this connection waiora means sunlight, and it is so called because the Maori taught that the sun is the origin of life. This waiora is a concrete expression, not two distinct words, and is closely allied to the words vaiora of eastern Polynesia, meaning “to be, to exist.” The waning moon does not bathe in life-giving waters of Tane to regain her youth; she bathes in the sunlight of Tane, and so returns to us again young and fair—which may be termed a scientific fact.
The moon is personified in Hina-keha, or Pale Hina, and Hina is a farspread name for that orb, as also is that of ra for the sun, a name that in ancient times was known in Babylonia and Egypt. Hina, being a female, is not included among the children of Rangi and Papa. Rona is the maid in the moon, her full name being Rona-whakamau-tai, or Rona the Tide-controller. Rono, according to Fenton, was a name of the moon god in Assyrian myth. Here we find a parallel in Polynesia, where Rongo Longo, Lono, is evidently a personification of the moon. This is made clear in Hawaiian mythology, wherein Sina, personified form of the moon (cf. Sin of Babylonia), the Hina of New Zealand, on being translated to the heavens took the name of Lono.
Another of the primal offspring was Tu, he who personifies war and its attendant evils; he was an important departmental god. In Assyrian myth Tu represented the setting sun and death, while Ra-tum (the setting sun) was god of death in Egypt, and ra tumu denotes the setting sun in eastern Polynesia (Churchill's Easter Island, p. 126).
In opposition to Tu of evil fame we have Rongo, another of the seventy brothers, who personifies peace and the arts of peace, such as agriculture, and all fruits of the earth. Hence Rongo is appealed to in peace-making functions, and by cultivators of food products.
Another member of the family was Tawhirimatea, in whom are personified the winds of space. The personifications of wind number about thirty, each representing a different form. These are known as the Whanau Puhi (the Wind family).

Yet another of the brothers is the dread Whiro, he who personifies darkness, death, and evil. In the fierce war that waged between Tane (representing light and life) and Whiro (representing darkness and death) the latter was defeated. Hence he retired to the underworld, where he ever wages war against mankind and drags them down to death, while ever the former Dawn Maid, now Queen of the Underworld, strives against him for the souls of the dead.
In Tangaroa we have the personified form of fish, and he shares with Rona the task of controlling the ocean tides.
Te Ihorangi personifies rain, while Parawhenua-mea is the origin and personification of the waters of earth. The former was one of the primal offspring, but the latter, a female, was one of the daughters of Tane by Hine-tu-pari-maunga, the Mountain Maid; hence the streams seen descending from the great ranges. The offspring of Parawhenua-mea (water) was Rakahore, who represents rock, and who took to wife Hine-uku-rangi, the Clay Maid, and produced the personified forms of stones, such as Hine-tuakirikiri (Gravel Maid), and Hine-tuahoanga (Sandstone Maid), Hine-tauira (a form of flint), and many others. Another of the family was Tuamatua, who took to wife Wai-pakihi (Shoal Water), and begat different forms of stones, and sand.
Parawhenua-mea was taken to wife by Kiwa, guardian of the ocean, which is known as the Great Ocean of Kiwa. But the ocean is personified in one Hine-moana (Ocean Maid).
One Mahuika personifies fire. In the first place, fire emanated from the sun. When Tama-nui-te-ra (honorific name of the sun) decided to confer a benefit on man he sent them fire by, or in the form of, one Auahi-tu-roa (a personified form of comets). Mahuika had five children, and their names are those of the five fingers of the hand. (In Indian myth, Agni, the fire god, had ten mothers, who were the ten fingers of the hands.) These were the Fire Children, or family, and in the myth of Maui we see that Mahuika plucked off one of her fingers and gave it to him as fire. When pursued by Fire, Maui called upon Te Ihorangi (rain) to save him; hence rain fell, and fire fled for shelter to Hine-kaikomako (personified form of the kaikomako tree, Pennantia corymbosa). Thus is it that when man seeks to generate fire he hews a piece off the body of Hine-kaikomako whereby to procure it. The sister of Mahuika, one Hine-i-tapeka, represents the fire of the underworld—volcanic fire.
Now, the sun has two wives, Hine-raumati, or Summer Maid, the personified form of summer, and Hine-takurua, or Winter Maid, the personified form of winter. The latter is a fisher, and the former a cultivator of food products. The sun dwells half a year with the Summer Maid, and the other half with the Winter Maid. The offspring of the former is Tane-rore, whose dancing is the quivering appearance of heated air in the summertime. It is personified in Parearohi.
We have in Hine-ata a personified form of morning; of day in Hine-aotea; and of evening in Hine-ahiahi, the Evening Maid. All three are females. This is a Moriori myth.
In Hine-te-uira and Tama-te-uira we have personified forms of lightning one of each sex; and there are ten other such forms. Tawhaki also seems to be connected with lightning, as also was Mataaho.
Whaitiri personifies thunder, but each kind of thunderstorm has its own personified form, such as Rautupu, Whaitiri - pakapaka, Ku, Ea, Aputahi-a-pawa, Tane-matau, and others. Thunder is often personified

in Hine-whaitiri, the Thunder Maid. It will be noted that a considerable number of personified forms are of the female sex. Hine-kapua is the Cloud Maid.
Personifications of the rainbow are Kahukura, Uenuku, and Haere Uenuku was originally a person of this world. He dwelt on earth, where he attracted one Tairi-a-kohu (personified form of mist), who had come down from celestial regions in order to bathe in the waters of the world. She visited Uenuku only during the hours of darkness, and strictly forbade him to make her known to his people. So beautiful was she that Uenuku felt compelled to disobey her. By a cunning trick he delayed the departure of the Mist Maid, and so exposed her to the people, whereupon she deserted him and never again returned to earth. Uenuku was now disconsolate, and he set off in search of her. He traversed distant regions and many realms, but never again beheld the Mist Maid. Finally death came to him as he still sought her, and his aria, or visible form, is the rainbow we see in the heavens. Parallels of this curious myth are widely known in Europe and elsewhere, as shown in the writings of the late Andrew Lang.
A rainbow composed of bands of different colours has as many personified forms, each colour bearing its own name.
Hine-korako is the personified form of a lunar halo or bow.
Personified forms of the comet are Wahieroa, Tunui-a-te-ika, Upokoroa, Auahi-tu-roa, Taketake-hikuroa, Meto, Auroa, Unahiroa, and possibly Puaroa.*
Fire is sometimes termed Te Tama a Upokoroa (the son of Upokoroa, the long-headed one), because the seed of fire was brought to earth by a comet, and hence Mahuika produced the Fire Children. These comet-names are suggestive in their meanings, as “long-headed” and “long-tailed.”
Personifications of meteors are Tamarau and Rongomai.
Hine-pukohu-rangi and Tairi-a-kohu are personified forms of mist, and Hinewai represents fine misty rain.
Ruaumoko represents earthquakes. He is the youngest child of the Earth Mother, but never came forth to this world. When he moves within the body of Papa an earthquake results.
Volcanic phenomena are represented by Hine-tuoi, Ioio-whenua, Hine-tuarangaranga, Te Kuku (or Te Pupu), Te Wawau, and Tawaro-nui.
The personified forms of wind and of rain are said to have cohabited, and their issue, twelve in number, represent different forms of snow, frost, hail, and ice.
In Wero-i-te-ninihi, Wero-i-te-kokota, Maeke, Kunawiri, &c., we have personifications of cold, and the first two are also star-names—stars marking winter months.
An old cosmogonic myth is that Te Ao (Day) and Te Po (Night) produced as offspring Oipiri and Whakaahu, or Winter and Summer, who were born in space; both are females. Oipiri, whose full name is Oipiriwhea, pertains to night, and her name has the same signification as that of Takurua-hukanui, or Cold-engendering Winter; she produces snow, ice, frost. Whakaahu belongs to the day, or to this world, which she represents. Both of these female personified forms were taken to wife by Rehua, he who personifies the heat of summer. Their attendants are ever contending against each other, but neither side ever gains a permanent victory. This
[Footnote] * Puaroa, cf. Pusaloa = comet (Samoa).

illustrates the struggle between summer and winter, which occurs often, but is never final. Tama-uawhiti, also known as Hiringa, represents Whakaahu—that is, summer. He is the same as Tama-nui-te-ra—that is to say, the sun—and he represents desire for knowledge, industry in procuring food-supplies, and other important activities. He is termed te puna o te matauranga (the source of knowledge). An old saying is, “Kotahi tangata ki Hawaiki, ko Whakatau anake; kotahi tangata ki Aotearoa, ko Tama-uawhiti” (There is only one person at Hawaiki—namely, Whakatau; there is one person at Aoteroa, Tama-uawhiti). This is equivalent to saying, “The most important being at Hawaiki is Whakatau; the most important thing in New Zealand is the sun”—as it probably was to a people coming from the tropics. It is probable that Whakatau is a personification, possibly of winter, for we have a sentence in the above myth that runs thus: “Whakatau was a warrior, equalling Oipiriwhea.” We have already seen that Whaitiri, Wahieroa, and Tawhaki, of Polynesian myth, are personifications, and Hema is a name for the south wind at Hawaii.
Whakaahu, Takurua, and Rehua are also star-names, whilst Oipiri seems to be connected with Pipiri, a double star that appears in June.
Tioroa represents winter, and Takurua is employed in a similar sense. Spring is personified in Mahuru.
We have seen that Hiringa (or Tane-i-te-hiringa) represents knowledge, but the acquisition of knowledge and the power of thought, mental activities, are personified in Rua-i-te-pukenga, Rua-i-te-hiringa, Rua-i-te-mahara, Rua-i-te-wananga, &c.
Space is personified in Watea and Rongomai-tu-waho, and misfortune in Aituā.
In personified forms of clouds we have Hine-kapua, Tu-kapua, Aoaonui, Aoaoroa, Uhirangi, and Takerewai, and these all dwell in the house called the Ahoaho o Tukapua (the open space of Tukapua). Here they ever dwell, for they are in fear of Huru-mawake, Huru-atea, Huru-nuku, and Huru-rangi (personified forms of the four winds), fearing to be jostled and swept away to the bounds of Rangi-nui (the heavens).
The two principal personified forms of wind are Tawhirimatea and Tawhiri-rangi. These personified winds in general, but each wind has its own personified form. The personified forms of ice, snow, and frost we have already encountered; they dwell upon the summit of Mahutonga (an emblematical term for the south), in the realm of Pārāweranui. The Wind Children of Tawhirimatea bring hither the semblance of those offspring in the drifting snow and driving hail. One Tonganui-kaea took to wife Pārāweranui (personified form of the bitter south wind) and produced some two dozen offspring, all of whom are personifications of different forms of wind. These are the Whanau Puhi, the Wind Children, who bore Tane to the twelfth heaven when he went to obtain the three baskets of occult knowledge.
The Wind Children abide at the Tihi o Manono, in Rangi-naonao-ariki (the tenth heaven, counting upwards), where also dwell their elder brethren, the personified forms of the four winds—north, south, east, and west. For there dwell Pārāweranui, Tahu-makaka-nui, Tahu-mawake-nui, and the other elders; all live in the houses Pumaire-kura, Rangitahua, Rangi-mawake, and Tu-te-wanawana-a-hau.
The plaza of the Wind Children is known as Marae-nui, as Tahuaroa, as Tahora-nui-atea. It is the marae of Hine-moana, the Ocean Maid, the vast expanse of the great ocean. This plaza is the playground of the Wind

Children. To this meeting-place they come from all parts to frolic and gambol on the broad heaving breast of the Ocean Maid. From the frigid south comes Pārāwera-nui, from the blustering west hurries Tahu-makaka-nui, from the east glides Tahu-mawake-nui, and from the fair north comes the marangai, while from every intermediate point the younger Wind Children troop forth to hold high revel on their great playground of Mahora-nui-atea, illuminated by Tane-te-waiora, or by the Whanau Marama, the Children of Light that gleam in cloudless skies when Tane has departed.
A list of the many personified forms of wind would be tedious, but some of the more prominent ones were Rakamaomao, Titi-matangi-nui, Titi-matakaka, and those given above.
Tane is the personified form of trees, for a reason already explained, and in this connection his name is Tane-mahuta—for Tane, like the old-time gods of Babylonia, has many names, according to his activities or manifestations.
When engaged in his great search for the female element Tane took to wife many beings, who produced trees. In many instances such beings are viewed as the personified forms of such trees. Thus Mumuwhango represents the totara, Te Puwhakahara the maire and puriri, Ruru-tangiakau the ake, Rerenoa the rata and all parasitic and epiphytic plants, Hine-waoriki the kahika and matai, Mangonui the tawa and hinau, Hine-mahanga the tutu, Hine-rauamoa the kiokio fern, and so on. Puahou represents the parapara, Poananga the clematis, while Hine-kaikomako we already know in her character of fire-preserver for mankind. Toro-i-waho represents all aka (climbing and creeping plants), Tauwhare-kiokio all tree-ferns, Putehue the gourd-plant, and Haumia the edible rhizome of the bracken.
Te Rara-taungarere seems to represent the fertility of trees and plants, while Rehua was also connected with forests; he is mentioned with Tane in connection with forests (White's Ancient History of the Maori, vol. 1, p. 145), and lehua was an old Hawaiian term for forest.
Tane, under the name of Tane-mataahi, represents all birds, though Punaweko is said to have been the origin and personification of forest-birds, and Hurumanu the same in regard to sea-birds. One Tane-te-hokahoka is also spoken of as one who brought birds into being; probably this is another name for the great Tane. Rupe personifies the pigeon.
In addition to these major personifications, we have, as in the case of trees, personified forms of different species of birds. Thus Terepunga and Noho-tumutumu represent the kawau or cormorant, Parauri the tui, Hine-karoro the seagull, Hine-tara the tern, Moe-tahuna the duck, Matuku the bittern, Tu-mataika the kaka parrot, Koururu the owl, and others might be given.
In regard to fish, we have Tangaroa, who represents all fish. Tutara-kauika represents whales. Puhi is the personified form of eels, Takaaho of sharks. Te Arawaru represents shell-fish.
Rakahore is the personified form of rock, and Rangahua seems to represent stones. These are the more important beings, but Hine-tuahoanga represents all forms of sandstone, Hine-one all sand. Poutini personifies greenstone in general, and is also a star-name. Hine-aotea, Hine-auhunga, Hine-tangiwai, Hine-kahurangi, Hine-kawakawa, and Taurra-karapa represent different kinds of greenstone, while Whatuaho and Mataa represent obsidian. These will suffice as illustrations.

Even swamps are personified in Hine-i-te-huhi and Hine-i-te-repo. South Island Maori state that Hine-tu-repo was the wife of Maui, and it was she who was interfered with by Tuna or Puhi, personified form of the eel. Maui himself seems to have personified day or daylight; hence his contest with Hine-nui-te-po, of the realm of darkness. Transform the eel into a snake, and in the inner reading of the Maui, Hine, and Tuna myth you have the true version of our borrowed myth of Eve and the serpent. This story also explains why the tail of an eel is known as hiku rekareka and tara-puremu. The name of the woman is usually given as Hina, a suggestive name.
The glow-worm is personified in Hine-huruhuru and Moko-huruhuru, the earth-worm in Noke, and the lizard in Rakaiora. One Peketua was the origin of lizards, and the first to appear was the tuatara. Peketua moulded some clay into the form of an egg, and took it to Tane, who said, “Me whakaira tangata” (Give it life). This was done, and that egg produced the tuatara. All land-birds were then produced from another egg, fashoned by Punaweko, and sea-birds from yet another, made by Hurumanu. Birds and tuatara had a common origin.
Maru is the personified form of some celestial phenomenon. Among the Awa folk of the Bay of Plenty Wainui is a personification of the ocean, and Tahu personifies food.
Though Whiro is the origin of death, &c., yet there are many personifications of different kinds of disease and misfortune. Among them are Maiki-nui, Maiki-roa, Maiki-arohea, Tahu-maero, Tahu-kumia, Tahu-whakaeroero, and Tahu-pukaretu. All these dread beings are the henchmen and agents of Whiro, the evil one. They dwell within Tai-whetuki, the abode of disease and death, which belongs to Whiro, and ever they afflict mankind. Thus does Whiro still continue his struggle against Tane, continuing to slay man, animals, trees—all things of this world that sprang from Tane. Thus is man destroyed in the upper world, and when his spirit reaches the underworld Whiro strives to destroy that also. Had not Hine-titama, the Daughter of Light, descended to the underworld, there to war with Whiro and so rescue the spirits of her children, then they would have been cast by Whiro into Tai-whetuki and Tai-te-waro, there to perish. When men of this world die, their spirits are drawn down to the underworld by Rua-toia and Rua-kumea, and are there received and protected by Hine. For, in the days when the world was young, when Hine fled from Tane, the sun god, her abiding words were, “I go to the lower realm that I may protect our descendants; to the underworld I will draw them down and cherish them; their spirit-life shall be my care. Maku e kapu i te toiora o a taua tamariki.”
But ever Maiki-nui and Maiki-roa lurk within Tai-whetuki, the House of Death, while Rua-toia and Rua-kumea convey the souls of men to the care of the Daughter of Light, erst the Dawn Maid.
There are two aspects of Maori myths, or two forms in which they are related. One of these is the common or “fireside” version, the other is the “inner” version, as conserved in the school of learning, and taught only to those entrusted with the task of preserving the esoteric knowledge of the elders of the tribe. These remarks do not apply to ordinary folk-tales, but to what may be termed the higher class of myths. The ordinary version of such myths is known to all members of the tribe, and may be related at any time or in any place. The other version is seldom heard, and is usually unknown to the bulk of the people.

As an illustration of this double aspect, we will take the case of the myth concerning the origin or cause of the ocean tides. The common version is that tides are caused by the inhalations and exhalations of a colossal marine monster known as Te Parata. The school of learning ignored this as a fable, and taught something nearer the truth—namely, that when all realms were being placed under the control of certain guardians the marama-i-whanake, or waxing moon, and Rona were appointed to control the tides of Hine-moana (personified form of the ocean). Again, the common version of the story of Rona is that she was transferred to the moon as punishment for having insulted that orb because one night its light became obscured when she was proceeding to fetch a calabash of water. She is yet visible in the moon, with her calabash by her side.
We have also the instance of Tane, whose many names were often inserted in genealogies showing the descent of man from the gods and the primal parents. The inclusion of these names as those of different beings was strongly condemned by the learned. The same remarks apply to Tiki and others.
We have given abundant evidence that the Maori was permeated with the spirit of animism and of animatism—that is to say, he believed in spiritual beings, and also attributed life and personality to things, but not a separate or apparitional soul as in the case of man. Yet the writer has heard statements made to the effect that the Maori possessed no power of abstract thought. Now, if there is one quality that the Maori did possess, it was that power.
In a brief account of Maori personifications it is impossible to give the various myths relating to them or in which they figure. We can only scan the long list and mention the more interesting of such personified forms. The following condensed account of one of the exploits of Tane will, however, serve to show how the wise men of yore handed these myths down, and how they taught racial beliefs to succeeding generations. Tane, the personified form of the sun, is necessarily the origin of light; hence he is spoken of as the enemy or opponent of Whiro, who personifies darkness. After a long contest and many battles on the horizon and elsewhere, darkness is defeated and retires to the underworld, though Whiro still wars against Tane. As the personified form of evil things, he causes his satellites, Maikinui and others, to assail the offspring of Tane, who succumb in their thousands. Tane, as personified form of knowledge, is called Tane-te-wananga; it was he alone who succeeded in ascending to the twelfth heaven, where he obtained from Io the three baskets of occult knowledge, a fact that was bitterly resented by Whiro. The latter, as the elder brother (darkness is older than light), objected to such treasure passing to the younger brother.
When about to make the great ascent, Tane went to Tawhirimatea and Huru-te-arangi and asked them for the services of their offspring, the Wind Children, to convey him to the heavens. The multitude of Wind Children assembled from all quarters to bear Tane to the heavens; from far-distant realms, from the great spaces of Tahora-nui-atea they came. They ascended to the upper regions, to arrive at the Cloud House, whence emerged the Cloud Children to join them in brave array. Now came the multitude of Peketua, the Whanau akaaka, the repulsive ones—insects, vermin, winged creatures—sent by Whiro to attack Tane. But the Wind Children guarded Tane; they furiously assailed the emissaries of Whiro, scattered them, and drove them afar.

Having gained possession of the three baskets of divine or esoteric knowledge—that of good, that of evil, and that of ritual—Tane began his descent to this world. He now assumed the name of Tane-i-te-wananga, as representing all knowledge, as being the fountain and source of knowledge. During his descent he was again attacked by the army of Whiro, and here he is alluded to as Tane-te-waiora, for it was Darkness attacking Sunlight. His attendants called upon the personified forms of wind, snow, hail, &c., who swiftly came and defeated the hordes of Whiro. Some of the latter were captured and brought down to earth, among them being Waeroa (mosquito) Namu-poto (sandfly), Naonao (midge), Ro (mantis), Moko-kakariki (green lizard), Pekapeka, Ruru, and Kakapo (all night-birds). Thus Tane returned safely to this world, bringing with him the great boon of knowledge for the benefit of his descendants, the people of the World of Light.
A study of the mythopoetic tales so frequently met with in Maori lore tends to show that such mental concepts are by no means to be classified as ordinary folk-tales. They are not merely metaphorical discourses or light allegorical fables, but often show that much thought has been devoted to the subject of the myth, to endeavour to discover cause or origin. The myth of Rona (the moon) and the tides illustrates this view, and other instances might be mentioned in which the Maori mind has approached near to scientific truth.
At the same time, man in the culture-stage of the Maori would never state baldly that the moon controls the tides. He must at least personify ocean and moon, for this curious faculty is one of the most remarkable and persistent features in the traditions and occult lore of uncultured peoples. We can even see survivals of such conceptions among highly civilized races, and we still cling to a few of the old-time personifications.
Neolithic man adopted this mode of teaching what he held to be primary truths. Having worked out his crude theories of the origin of the earth, of the heavenly bodies, of natural phenomena, of man, and of many other things, his mentality, strangely affected by long ages of contact with nature and by ignorance of natural laws, proceeded to depict all activities as anthropomorphic beings, and hence the Maori myths we have discussed in this paper. Uncultured man handed down his conclusions as prized knowledge to his descendants; he taught his children these myths, as we teach ours the moral lessons contained in Aesop's fables and in fairytales.
A. C. Parker struck at the root of personification when he wrote, “The primitive mind, believing all things the result of some intelligence, personifies and deifies the causes of effects, and thus has arisen the multiplicity of gods and guardian spirits.” Thus we have the many manifestations of the activities of Tane, the sun god and fertilizer. Even sunlight is personified in Tane-te-waiora, and in an old song we find the following:—
Ko te ata i marama,
Marama te ata i Hotunuku,
E, ko Tane-te-waiora … e.
(Fair dawned the morn,
Bright was the morn at Hotunuku,
Behold ! it is Tane-te-waiora.)
Explanatory myths teem in Maori lore, and are a characteristic feature of the peculiar plane of culture to which he had attained. The Maori was

a mystic by nature. He ever felt that he was part of a living world in which nothing is truly inanimate. He looked upon Mother Earth as the nourisher of mankind, her offspring; his outlook upon life and upon his surroundings differed much from ours; he possessed a feeling of kinship with nature, and a curious form of mental vitality, utterly unknown to the dweller by city streets.
The curious practice of attributing sex to things that possess none is very noticeable in Maori myths, and we ourselves have retained some survivals of this habit. The Maori held very singular beliefs as to the protective and destructive powers of sex, beliefs that seem to be also held by certain races of India. Animatism is marked by mental concepts of a very strange nature, which in many instances are most difficult to understand; of this fact many illustrations might be given.
These peculiarities of Maori mentality have the effect of making genuine old traditions, recitals, poems, and speeches of much interest, simply because they were reflected in the language of the people. The mythopoetic concepts passed into the common tongue; hence such matter as mentioned above teemed with allusions to personifications, with metaphor and allegory, with aphorisms and occult expressions. Here we encounter in a living language the figurative expressions and quaint sayings in which is preserved the mentality of uncultured man. Here are the fossilized thoughts of long-gone peoples, of past ages, being uttered by persons of our own day.
The better-class Maori was ever careful to acquire a knowledge of tribal history, of myth, tribal aphorisms and poetry, in order to adorn and point his speech. These folk were born orators, most punctilious in their utterance, and their formal speeches were marked by rhythm, by peculiar modes of diction, and by archaic and poetical expressions.
When Whare-matangi took leave of his mother, Uru-te-kakara, at Kawhia, in setting forth to search for his father, he said to her, “Farewell! Grieve not for me. Should I survive, then the sea-spray will assuredly return me to your side. Two nights hence, look you to the south; should the gleam of Venus be plainly seen, it will be my token to you that I have safely reached my destination. If you see it not, then know that Aitua has struck me down, by the hand of man or by Maikiroa. Then do you send me kindly greeting by means of the kura awatea,* that I may be comforted by it in Rarohenga” (the spirit world).
When Ngarue and his wife were separated, and he departed for Taranaki, he said to her, “Farewell, the breast-clinging spouse ! Shame gnaws at me like unto the gnawing of the Ocean Maid into the flanks of the Earth Mother. It is like a fire burning within me. Even my love for you pales before it. Farewell ! Remain at your home with your elders. Think not of me, though I will ever greet the mists that hang over Parininihi and conceal you from me. And now the swift-running stream can never return to its source. Farewell ! The gnawing of affection is a grievous affliction, but by Te Ihorangi was Mahuika destroyed. Farewell ! In the summer of our days we part as the Dawn Maid parted from the Sun God.”
In these notes we have endeavoured to explain the Maori genius for personification, and to throw some light on his modes of thought. For
[Footnote] * The kura awatea is the solar halo. The Maori believed that certain persons possessed the power to produce this phenomenon, and that they utilized it in signalling to a distance.

the Maori lived in a world to which we have no access; we emerged from that world many centuries ago, to enter a new and very different sphere.
The Maori had a loving regard for the earth, for was not Papa, the Earth Mother, the mother of mankind? Far above him he saw Rangi, the Sky Parent, upon whose breast the Whanau Marama, the Children of Light, were arranged by Tane the Fertilizer, who traverses the head of Rangi accompanied by Tane-te-waiora, the cheering sunlight. The moon was to him Hina-keha, Pale Hina, she who follows in the wake of the sun god, and, in times of stress, becomes Hina-uri, or Darkened Hina. In the transient comet he recognized Auahi-tu-roa, he who brought fire to mankind; and in Maru he resolved celestial phenomena into a protecting deity and a war god. When a meteor darted across the heavens he knew that Tamarau was active; and he saw in the brilliant rainbow Uenuku spent with his long, hopeless search for the Mist Maiden. When the chill winds of winter smote him he knew that Pārāweranui was abroad; when the heaving breast of the Ocean Maid troubled his rude craft he knew that the Whanau Puhi were gambolling on Mahora-nui-atea; when the golden trail of Tane gleamed athwart placid seas he knew that the Wind Children had retired to their haven. Far overhead he beheld the many-coloured battalions of Tukapua and the Cloud Maid, as they hurried forth from the Cloud House, harassed by Tawhirimatea. When Mahuika assailed in fiery wrath the offspring of Tane-mahuta he saw the countless legions of Te Ihorangi darting to their rescue, while Mahuika found fair haven within Hine-kaikomako. In the ceaseless contest between Parawhenuamea and Rakahore he saw the origin of Hine-tuakirikiri (the Gravel Maid), whose multitudes protect the body of the Earth Mother from the wrath of the Ocean Maid, and of whom it was said, “He ope na Hine-tuakirikiri e kore e taea te tatau” (A troop of the Gravel Maid cannot be numbered). Yet another stubborn defender of the Earth Mother was Hine-one, and all footsore travellers welcomed the advent of the Sand Maid.
Even so the Maori of yore traversed the path of life, the life he gained from the Earth Mother and from Tane. As he passed down that path he was protected by the offspring of the primal parents, by anthropomorphie personifications, and by the spirits of his dead forbears. When the path became faint as he neared its end, when Whiro and Maikinui destroyed his body, when his spirit traversed the Broad Way of Tane that leads to the spirit world, it was then that the Dawn Maid fulfilled her vow made in the days when the world was young, and protected her children who sought refuge within her realm.
And Tane the eternal, who saw the birth of man, guides his spirit down the Golden Way, and knows that the end is well.

Art. II.—Old Redoubts, Blockhouses, and Stockades of the Wellington District.
[Read before the Wellington Philosophical Society, 21st September, 1920; received by Editor, 21st September, 1920; issued separately, 27th June, 1921.]
Plates I, II.
The amount of interest displayed by Wellington folk in the story of the settlement of the district is exceedingly small, and very few possess any knowledge of the anxious times passed here by early settlers during the Maori disturbances of the “forties” of last century, and, in a lesser degree, some fifteen years later. Probably no man could locate the sites of all the blockhouses, stockades, and redoubts erected in this district in the early days, hence it has been deemed advisable to put together the following notes pertaining to those posts. The stockade-sites marked on Collinson's little map are approximate only, but fortunately the writer was enabled to fix them definitely ere the old generation of settlers in the Porirua district passed away.
Wellington Redoubts, etc., of the “Forties.”
The general feeling of uneasiness and apprehension that followed the Wairau massacre led to the erection of two defensive positions in Wellington—one on the Thorndon Flat, as it was called formerly, and one at Te Aro, on the north side of Manners Street. The former was situated near the junction of Mulgrave and Pipitea Streets, and was known as “Clifford's Redoubt” and “Clifford's Battery” among the settlers, but appears as “Thorndon Fort” in official documents. Mundy calls it “Clifford's Stockade,” but that name was usually applied to the post at Johnson's Clearing, now known as Johnsonville.
In the New Zealand Journal of the 1st March, 1844, appears a report of the Committee of Public Safety, of Wellington, appointed at the public meeting held on the 19th June, 1843. Among other items of interest in this report occurs the following: “Your committee have also to report that a battery has been erected on Clay Hill, under the superintendence of Captain W. M. Smith, R.A., and three guns placed therein. Another battery on Thorndon Flat was in progress at the period of the arrival of the military from Auckland, but has not been proceeded with since.”
Clay Hill was the name of the bluff headland, known otherwise as “Clay Point” and “Windy Point,” above the junction of Lambton Quay and Willis Street. Its native name was Kai-upoko
In the same Journal of the 6th January, 1844, containing Wellington news up to the end of July, 1843, appears a statement that at 9 o'clock on Sunday, the 2nd July, 400 Wellington Volunteers mustered for inspection on Thorndon Flat. At a meeting of the military sub-committee on the 6th July, there were present Major Durie (president), Captain Sharp, Major Baker, Major Hornbrook, and Dr. Dorset. “It was resolved that a public notice be issued calling upon all parties to assemble on Thorndon Flat on

Monday morning next at 9 o'clock, provided with spade and pickaxe, to assist at the erection of the battery now in progress, the completion of which has been retarded by the late unfavourable weather.”
The following is a copy of district orders issued in May, 1845:—
Wellington Militia.—District Orders.
By virtue of a commission issued by His Excellency the Governor of New Zealand, dated April 10, 1845, appointing me Major in command of the Wellington Battalion of Militia, I hereby assume command of the troops stationed in the southern districts of New Zealand.
Captain Russel, of the 58th Regiment, will take charge of and direct the detail of the garrison of Wellington.
Captain Wakefield will take charge of and direct the detail of the Wellington Battalion of Militia.
Captain Baker will take charge of and direct the detail of the Mounted Volunteer Corps when organized.
Lieutenant Rush, of the 58th Regiment, will hold the local rank of Captain in this division of the colony, to bear date the 10th April, 1845.
His Excellency the Governor having been pleased to appoint the undermentioned gentlemen to commissions in the Wellington Battalion of Militia, they are posted to companies as follows:—
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No. I Company: Captain William Wakefield, Lieutenant Charles Sharp, Ensign Nathaniel Levin.
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No. II Company: Captain David Stark Durie, Lieutenant Hugh Ross, Ensign George Hunter.
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No. III Company: Captain George Compton, Lieutenant James Watt, Ensign Edward Abbott.
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No. IV Company: Captain John Dorset, Lieutenant Robert Park, Ensign George Moore; Ensign Samuel Edward Grimston to be Aide-de-Camp to the Major commanding.
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Captain Arthur Edward Macdonogh, Adjutant. Quartermaster, Alfred Hornbrook.
On the alarm being given, the troops will assemble at the following places:—
The detachment of the 58th Regiment will fall back upon Thorndon Fort.
No. 1 Company of Militia will assemble at Thorndon Fort.
The detachment of the 96th Regiment will fall in under arms at the Barracks, Te Aro, when they will be joined by No. 2 Company.
No. 3 Company will proceed to Fort Richmond, on the Hutt, and join the detachment of the 58th Regiment stationed there, under the command of Captain Rush.
No. 4 Company and the Cavalry will assemble in front of Thorndon Fort.
The Captains of Nos. 1 and 2 Companies will enrol the names of any volunteers who are desirous of giving their aid in case of emergency, and station them within the forts of Thorndon and Te Aro, for their defence, to render as many men of their companies as possible available to resist any attack that may be made upon the town.
The companies of the Militia stationed in the town of Wellington will patrol every morning from 5 o'clock till 7 o'clock a.m. No. 1 in the district from Thorndon Flat to the station of the 58th Regiment; No. 4 from Kumutoto Stream to Thorndon Flat; No. 2 from Te Aro Flat to Kumutoto Stream.
These patrols will consist of a non-commissioned officer and four men, and will move in the rear of the town.
The detachments of the 58th and 96th Regiments will protect the flanks, and patrol at the same hours, the former in the direction of Wade's Town, the latter towards the signal-station and Evans Bay.
The Cavalry Corps, when formed, will patrol the roads leading to Karori, Porirua, and Petoni.
A guard of the Militia consisting of a sergeant, corporal, and twelve men will mount daily at Thorndon Fort. The companies of Militia will assemble at their private parades for exercise every morning at 8 o'clock, and 4 in the afternoon, until further orders.
Definite instructions have not yet been received relative to the pay of the Militia, but for the present it will be the same as the non-commissioned officers and privates of the line. Those working at the batteries between the hours of drill will be allowed 10d. a day extra.
The Militia volunteer for three months, or 28 days.
(Signed)
M. Richmond
, Major Commanding.
In the New Zealand Journal of the 10th October, 1846, giving Wellington news up to the 27th May, is the following: “An address has been issued by Major Richmond stating that, in the event of any alarm, two guns will be fired. The guns at Thorndon Fort have been put in order and placed in charge of a gunner from Her Majesty's ship ‘Calliope.’ The carriages of the two guns at the head of the bay will also, by direction of Captain Stanley, be repaired by the carpenters of the ‘Calliope,’ and the guns will be rendered fit for service.”
Colonel Mundy, who was in Wellington in 1847, wrote: “On the plain of Thorndon is an old field-work called Clifford's Stockade, mounting a few guns …. and intended as a place of refuge in case of an attack. With a little repair and deepening of the ditch this trifling earthen fortalice might be made quite efficient against a coup de main; and, by a very simple contrivance, which may perhaps have never occurred to an engineer, or other defender of a fortified post, might be rendered impregnable against bare-footed savages—namely, by throwing into the ditch all the broken bottles which, in a short period, have been so lavishly emptied by the Company's colonists !”
The above writer has another entry, as follows: “January 18. Inspection of the 65th Regiment on Thorndon Flat, an excellent parade-ground, like an English village green. It is pleasant to see the truly British appearance of the troops of this country—no pale faces, no dried-up frames. Here was a corps 900 strong, including detachments, so increased individually in bulk and healthiness of aspect since I saw them a year ago at Sydney, after a long voyage from England, that it was difficult to believe them the same body of men.”
Te Aro Fort.
In Mr. Brees' illustration showing the old Wesleyan Chapel in Manners Street appears a part of the earthworks of the redoubt at Te Aro, which was situated on the north side of Manners Street, opposite the above chapel. Brees remarks, “The house occupied by the late Mr. Brewer is on the right of the road, and the large trench and mound which were formed immediately after the Wairau massacre, for inclosing certain spots as places of refuge in case of Wellington being attacked by the natives.” The illustration shows a bullock team and dray proceeding along Manners Street.
Barracks.
In the New Zealand Journal of the 15th January, 1848, giving Wellington news up to the 14th August, 1847, appears a short item from the Wellington Independent, as follows: “The mechanics and artisans employed in the erection of the new barracks lately completed at Mount Cook were on Monday evening regaled with a substantial supper by the contractor, Mr. Mills. The evening was very pleasantly spent. We have much pleasure in noticing this event, because the buildings have given great satisfaction, and reflect credit upon all engaged in their construction.”
The Thorndon Barracks were situated on the eastern side of the old Queen's Head Hotel, where Fitzherbert Terrace now is. They have long disappeared, but two of the four cottages built for the officers at the junction of Park Street and Grant Road, eastern side of Park Street, are still standing. The wood-trails on the hillside above Park Street, where the soldiers used to throw the wood down, are also still in existence.
The Thorndon Barracks witnessed a lively scene during the visit of the Duke of Edinburgh to Wellington in 1869, when a party of Maori performed a war-dance on the flat. They were armed with Enfields that were kept in store there

Karori Stockade.
The site of this post has been fixed on the map. It was erected on Mr. Chapman's land at Karori in the “forties,” as a rallying-place and refuge for the surrounding settlers. It was erected under the supervision of Mr. A. C. Strode, on the high ground south of the main road and about opposite the English Church. It was apparently never utilized as a refuge.
Colonel Mundy wrote of Karori in 1847, “Here are several hundred acres partially cleared, and the remains of a stockade built for the defence of the rural community.”
Hutt Posts of the “Forties.”
Fort Richmond.*
This was the principal defensive post in the Hutt district during the troubled “forties,” and was situated near the old bridge, which was somewhat down-stream from the present bridge.
Brees tells us that Fort Richmond “was constructed under the direction of Captain Compton, an enterprising settler of the Hutt. It is planned on the model of those in the United States of America to guard against incursions of the Indians. The stockade is arranged in the form of a square of 95 ft., with towers of defence, or blockhouses, at two of the opposite angles, which command the bridge and river on both sides. It is composed of slabs of wood 9 ft. 6 in. high, and 5 in. to 6 in. thick, and is musket-proof. One of the blockhouses is 15 ft., and the other 12 ft. square. The fort was erected at a cost of £124, independent of the value of the timber, which was presented by Mr. Compton, and voluntary labour to the amount of £54 10s. is included in the above statement of the cost.
“The excitement which was felt at the Hutt when a party of the 58th Regiment took up their quarters in the fortress on the morning of the 24th April, 1845, will not soon be forgotten. The settlers having brought all their energies to their assistance in the erection of the stockade, had just completed it on the evening of the previous day (Sunday), when an attack was expected from the natives. The settlers accordingly determined to hold possession until the arrival of the military, which took place at about 3 o'clock in the morning, amid the acclamations of the settlers.”
This post was named after Major Richmond, who was then in command of the district. A woodcut of the fort appeared in an early number of the Wellington Independent (now known as the New Zealand Times). A contemporary remarks of those crude woodcuts, “They are apparently the work of no trained artist. The ground is black and the delineation white, reversing the usual process.” Brees gives a good illustration of the fortress.
Wellington papers of October, 1846, state that, “We are informed that the late flood in the Hutt has done considerable damage in the district. The south-western corner of Fort Richmond, where a detachment of the 58th Regiment is stationed, has been thrown down.” Ere long the river had swallowed the site of Fort Richmond, which fortunately was no longer needed.
Colonel Mundy, in Our Antipodes, made the following remark on Fort Richmond: “It is a small baby-house kind of fortress built of timber, with a couple of carronades on corner turrets, one of which, impinging on the river, has been carried away by a freshet.” This writer visited the Hutt in 1847.
[Footnote] * Not shown on map, but situated on the opposite side of the river to the blockhouse above Hikoikoi pa.

Boulcott's Farm Post.
At this place the troops were camped in tents and farm buildings without any protection, hence we have no defensive works on which to remark. The attack of the 16th May, 1846, was the natural sequence of establishing this singular form of military post. The site of it was near the spot marked on the map issued by the Lands Department, and entitled, “Wellington Country District: showing Native Names.”
The Taita Post.
As this place is always called “Taitai,” which, according to Mr. Buck, a surveyor, of Hutt, is its correct name, our early settlers must have formed their own ideas of how it should be spelt. The name of Nainai appears to have suffered in a similar way.
The Wellington Spectator of the 28th February, 1846, remarks, “The stockade and barracks to be erected in the Hutt district will be 90 ft. square, and will be composed of trees 12 in. in diameter placed closely together and loopholed all round; the stockade is to be splinter-proof. When completed it will be capable of accommodating eighty men and two officers. The site fixed upon for the stockade is near Mr. Mason's house, or rather beyond the present encampment. It is intended to have it completed in a month's time.”
The post was, however, established a considerable distance above Mr. Mason's place, its site being on the western side of the present hotel at Taita. A local paper remarked in May, 1846, after the attack on Boulcott's Farm (see New Zealand Journal of the 10th October, 1846), “After getting rid of the Maoris on the Hutt, His Excellency decided on building a blockhouse, and maintaining a post of a hundred men somewhere about Mason's section, considerably in advance of the picquets surprised by the natives (i.e., Boulcott's Farm). Instead of this being done, the Superintendent and his coadjutors objected to the amount of the tenders for building the blockhouse, and, the Governor yielding to them, the soldiers fell back to Boulcott's barn, where they were attacked.”
Shortly after the above appeared we find the following in a local paper (see New Zealand Journal, 21st November, 1846): “The troops and the native allies in the Hutt have been forming an entrenched camp at Taita in the shape of two squares connected at an angle of each, and having a communication from one to the other.”
It would appear, however, that a number of Militia were stationed at Taita when the attack on Boulcott's Farm took place, 16th May, 1846.
In Captain Collinson's report we find several statements concerning this post: “The flat part of the Hutt Valley is about eight miles long and two broad, covered with forest. About two miles up it the New Zealand Company's road crosses the river; here a small stockade called Fort Richmond had been erected some time before, and was occupied by a party of 58th under Lieutenant Rush. Two miles farther on was a settler's house called Boulcott's, in a clearing of some twenty acres, and two miles farther was another house called the Taita.” (See Plate I.)
Collinson tells us that Maori depredations caused the Governor to take action: “He proclaimed martial law, and (under the usual fiction of considering the natives as rebels) he sent a herald to inform them of it, and at the same time ordered the Taita farm to be occupied by a company of the 96th…. In March, 1846, there were three detachments occupying this little valley, fifty men at Fort Richmond, fifty men at Boulcott's,

and about a dozen militia at the Taita.” Wellington papers of October, 1846, reported, “A sergeant and ten men of the Hutt Militia have been kept on by His Honour Major Richmond, and stationed at the Taita, so that the settlers may have some little force to fall back on in case of accident.”
Porirua District Military Posts of the “Forties.”
Quite a number of military posts were established in the Porirua district. These were to serve three purposes: the protection of settlers, as at Johnsonville; defensible camps for military roadmakers; and, in the case of the Paremata and Paua-tahanui posts, the keeping of a watchful eye on the turbulent Ngati-Toa folk, and to act as an outpost for the defence of the Hutt Valley. Fort Strode seems to have been a small police post, another being situated at Waikanae. All these posts pertained to the lively “forties”; in the disturbed times of the “sixties” no posts were established in this district, though some troopers were stationed for a while at Paua-tahanui.
Clifford's Stockade at Johnsonville.
In the journal kept by Captains Wilmot and Nugent during their walking-tour from Wellington to Auckland, via Taupo, Galatea, and Rotorua, in 1846, occurs the following entry: “March 17, 1846. Started from Wellington in company with the Reverend G. on our road to Whanganui. At about 11 a.m. arrived at Johnson's Clearing on the Porirua Road, where about forty of the Volunteer Militia were stationed, under the command of Captain Clifford, and were constructing a stockade as a protection to the few settlers in the neighbourhood. The road thus far is good; afterwards there is a mere bush path to Jackson's Ferry.”
The Spectator of the 7th March, 1846, remarks, “On Thursday His Excellency, attended by a guard of thirty men under Major Last, proceeded on the Porirua Road to examine the stockade erecting under the direction of C. Clifford, Esq., and returned to town again in the evening.” Other statements in local papers of that month inform us that the Porirua settlers had been armed and placed under the command of Mr. Clifford, under whose direction a stockade had been commenced on Mr. Johnson's section. The site was a hillock on the north side of Ames's accommodation-house at Johnsonville, east of the main road and railway, and on the south side of the road running eastward to the old Petherick farm. We are told that this post was “for the defence of the settlers, and for the purpose of preventing any predatory incursions of the natives, and a company of sixty men has been formed for the protection of the district.” For some time sentries were kept on Sentry Hill and Mount Misery to guard against a surprise by Maori. Lieutenant L. R. Elliott, of the 99th Regiment, was in charge of Clifford's Stockade in October, 1846.
Middleton's Stockade.
When the military roadmakers pushed on beyond Johnsonville each of their camps was surrounded by a stockade, in case of any attack being made by Maori. The men also carried their arms every day they proceeded to work. It is not stated whether they worked under covering-parties or not, as we did in the Taranaki District in later years.
The first defensive post or camp north of Johnsonville was Middleton's Stockade, named after Ensign F. Middleton, of the 58th Regiment; it was situated on Section 26, west of the main road and about half a mile north

of the old Half-way House. It stood on the spur just above the road-line at the corner and rock-cut formerly known as “Pyebald's Corner,” “Byass's Corner,” and “Gibraltar Corner.” This post was built and occupied by men of the 58th Regiment. Each of these stockades from Johnsonville to the Ferry (or Jackson's Ferry), just north of the Porirua Railway-station, was named after the officer in charge of the post.
McCoy's Stockade.
Named after Lieutenant F. R. McCoy, of the 65th Regiment. It was situated on Section 36, on the eastern side of the main road, about where the house of the late Mr. James Taylor stands, on the left bank of the Kenepuru Stream, just below its junction with the Takapu Creek.
Leigh's Stockade.
Also known as “Fort Leigh.” Named after Lieutenant C. E. Leigh, 99th Regiment. It was situated on the west side of the road, about where the northern boundary-line of Section 41 cuts the road. The short road extending past the school is a part of the road-line as originally surveyed.
Elliott's Stockade.
Also known as “Fort Elliott.” The original stockade stood on the flat on the left bank of the Kenepuru Stream, about 7 or 8 chains south of the hotel (now closed) near Porirua Railway-station. Late in 1846 flood-waters overflowed this flat and rendered the post untenable, destroying 4,000 rounds of ball cartridge. A new stockade was built on the bluff or low hill on the western side of the road, Section 62—a much better site.
In October, 1846, two officers and twenty-four men of the 58th Regiment and two non-commissioned officers and thirty-four men of the 99th Regiment were stationed here under Captain A. H. Russell (father of the late Sir William Russell, and grandfather of the present General Russell who served in the Great War) and Ensign F. Middleton.
Paremata Redoubt.
This post consisted of a stone blockhouse (or barrack, as it was usually called) surrounded by a stockade. It was situated at Paremata proper, at Porirua Harbour. The name of “Paremata” applies properly only to the flat north of the railway-bridge; the railway folk are to blame for having transferred the name to the railway-station across the water. The station should have been named “Whitianga” or “Horopaki,” both names of places within a few chains of the station. The remains of this stone blockhouse at Paremata are still to be seen at Paremata Point, west of the railway-line (Plate II, fig. 1), and it was here, at the narrow channel between the outer bay and the inner arm, that the first ferry was established at Thoms' whaling-station.
In Collinson's report on the Wellington Military District (published in the papers of the Corps of Royal Engineers, 1855) appears the following: “On April 8 [1846] 220 men under Major Last were sent round to Porirua, and, after lying a week under Mana Island from stress of weather, they landed and pitched their tents on Paremata Point.” The Wellington Independent of the 15th April, 1846, mentions this movement. On landing at the point tents were erected, and a large whare near Thoms' whaling-station was also occupied. Men were set to work to form a trench and

rampart defence, of which some signs may still be seen. The building of the blockhouse was a slow affair. Wellington papers of October, 1846, stated that “The first stone of this building was laid on Friday, the 23rd instant, by Captain Armstrong, the officer in command at Porirua. As usual on such occasions, various coins of the present reign were deposited in the stone.” The Spectator of the 14th August, 1847, remarks, “Last Saturday [7th] the new stone barracks at Porirua were delivered over by Mr. Wilson, contractor to the Ordnance Department.”
A plan of this post made by V. D. McManaway in 1852 (fig. 2) shows the blockhouse almost surrounded by a five-angled stockade, the water-front being left open. Within the stockaded enclosure are shown a number of huts, including a sergeant's hut, three men's huts, a hospital, guard-room, and commissariat. A well is also marked inside the enclosure, while outside are the canteen, bakery, and two other huts.
The walls of the blockhouse were built of undressed stones laid in cement. Many are waterworn boulders apparently obtained from a pit near by, and a few bricks are worked into the walls. The portions of wall still standing are about 30 in. in thickness and up to 10 ft. in height. The dimensions
of the building are about 60 ft. by 36 ft. inside, and the ground-floor was divided into two rooms. The men's quarters were in the upper story, to which access was gained by means of an outside stairway. The place is only about 35 yards from high-water mark. The earthquake of 1848 so shattered the upper parts that the men were moved out into huts, and the shake of 1855 brought down the upper story. The post had been abandoned before the latter date. Turrets had been built on it, apparently to accommodate cannon of sorts, but the first shot fired at a passing canoe manned by hostiles so shook the fabric that the gun was not used again. Powers tells us that the stockade was a very inferior one.
The Wellington Spectator of the 27th May, 1846, gives the strength of the force stationed at Paremata as follows: 58th Regiment—seventy-eight men, under Captain Laye and Lieutenant Pedder; 99th Regiment—seventy-four men, under Captain Armstrong and Lieutenant Elliott; Royal Artillery—nine men, under Lieutenant the Hon. A. Yelverton; also twenty-five Royal Marines from H.M.S. “Calliope,” under Lieutenant Fosbrooke.
Paua-tahanui Post.*
This post was established at the Matai-taua pa at Paua-tahanui after its evacuation by the hostile Maori on the approach of the force of
[Footnote] * Mis-spelt “Paua-tananui” on map.

Militia and Maori auxiliaries from the Hutt in August, 1846. This force occupied the pa on the 1st August, Governor Grey arriving there in the afternoon of the same day, accompanied by Captain Stanley, of the “Calliope.”
The post was situated on the spur on which the church stands at Paua-tahanui, just above the creek, and above the bridge. A rude sketch of the Maori pa appeared in a Wellington paper of that time, but the reproduction of the stockade is decidedly eccentric. A sketch in the writer's possession is much more reliable. The name Matai-taua is one of the few local names of which we know the origin. This pa was built by the Rangihaeata when he retired from Motu-karaka some months before. When the Imperial troops advanced from Paremata fortress to join the Militia and Maori contingent in the advance up the Horokiri Valley Lieutenant De Winton occupied the pa as a military post. On the 10th August he was reinforced by a detachment of police under Sub-Inspector Strode. In October, 1846, we find that the post was garrisoned by three officers and one hundred men of the 65th Regiment. These officers were Captain R. Newenham, Lieutenant T. F. Turner, and Assistant Surgeon T. E. White.
In 1848 Captain Russell and a detachment of the 58th occupied the post. They were engaged in roadmaking. The post was finally abandoned in 1850. Apparently the 58th advanced to this post in 1847, for a traveller passing down the coast in that year describes it as follows:—
“The strong pa of Pawhatanui (?) belonging to Rangihaeata, Rauparaha's fighting-man, had been seized the year before by our forces, and was now occupied by a detachment of the 58th. I stopped at the blacksmith's outside the pa to have the horse shod, before taking him on the hard metalled road into Wellington. During the process an officer happened to pass. We entered into conversation, and the result was that Captain R., the officer in command of the detachment (for he it was), invited me to pass the night at the pa. Mounting the hill on which it stood, we entered the gate.
“The strong palisade, about 15 ft. high, which surrounded the original pa, remained undisturbed, but nearly the entire space within was now occupied by neat wooden huts, painted blue and shingled. Captain R., with his wife, a lieutenant and the assistant surgeon, with their wives, and an ensign, formed the society of the pa, and a very lively and agreeable society it was. The ladies were all young and pretty, and on the best terms with each other; Mrs. R., with her frank gaiety, being the life and soul of the little party. As for the officers, they did not, with the exception of Captain R., get through their time so easily—in fact they were mortally bored. What, indeed, had they to do? The doctor, in that provokingly salubrious climate, had no patients to cure, and the subalterns, since the Maori war was over, had none but routine duties to perform, which on detachment service are usually light enough. There was no hunting, and nothing to shoot but parrots, pigeons, and tuis. However, they did what they could; they fished and boated, pulled down almost daily to Paremata Point, where there was a detachment of the 65th, to compare notes with the major and the ensign, the latter of whom ingeniously contrived to kill a good many hours in the education of a talking tui, and laid schemes for obtaining leave to go to Wellington, which was another London or Paris to an unfortunate subaltern buried in the bush at Pawhatanui.”

Fort Strode.*
In Wakefield's Handbook, published in 1848, is a short description of the eastern or Paua-tahanui arm of Porirua Harbour, in which occurs the statement, “Two stockades, one of which is called Fort Strode, at different points of this north arm, have been occupied by small military detachments.”
One of these posts was that described above; the other, Fort Strode, named after Sub-Inspector A. C. Strode, of the Police Force, was situated on the terrace-like point of Motu-karaka, on the northern shore of this eastern arm of the harbour. The earthworks of the post are still to be seen near the point, which on some old maps is marked “Police Point,” on account of some police having been stationed there, under, I believe, Mr. Tandy. This post was built on the site of the position occupied by Te Rangihaeata after he left Taupo (Plimmerton) and prior to his removal to Paua-tahanui. His sojourn at Motu-karaka was rendered uncomfortable by young McKillop, a midshipman of H.M.S. “Calliope” (afterwards McKillop Pasha), who mounted a gun on the long-boat of the “Tyne” (wrecked shortly before at Island Bay), and strolled up and down the harbour bombarding hapless hostiles, and puncturing the atmosphere with cannon-balls.
In those days of the “forties” the ferry charge from Paremata to Jackson's Ferry was 1s. 6d., to Paua-tahanui the same, to Fort Strode 9d., and to Cooper's, at Whitireia, 9d.
We have now enumerated all the posts established in the Wellington District in the “forties,” and explained their situations. Other details and remarks concerning some of them, as Fort Richmond, Paremata, and Paua-tahanui, are not given here, not being necessary to a paper that is designed merely to draw attention to these places of interest. Further notes on some of them were published in a series of papers on “Porirua and They Who Settled it” in the Canterbury Times of 1914.
Native Disturbances of the “Sixties.”
Two Blockhouses erected in the Hutt Valley in 1860–61.
When these troubles arose in the land public uneasiness caused the erection of two blockhouses in the Hutt Valley, one at McHardy's clearing, Upper Hutt district, and the other near the Hutt Bridge, where the Post-office now stands. The latter has disappeared, but the former still stands (1918). The old post at the Taita seems to have disappeared about twenty years ago.
The Spectator of the 21st March, 1860, gives an account of the balloting for the first draft of the Militia at Mount Cook Barracks in the presence of Major Trafford.
Old Blockhouse at Upper Hutt.
Half-hidden by tree-growth, this old refuge of sixty years ago stands lone and unknown in a paddock half a mile from the Wallaceville Railway-station, in the Upper Hutt district, some twenty miles from Wellington City. Of the few who know of its existence some have curiously erroneous ideas as to its origin and age. It was built in the latter part of the year 1860 as a refuge and rallying-place for the settlers of the district, in case of a Maori raid; for at that time many of the Maori of the Otaki district were hostile to Europeans, and the King flag was hoisted in the village
[Footnote] * Not shown on map, but situated on the point immediately west of Paua-tahanui, north-east of Paremata.

at the Roman Catholic end of the settlement. The Wairarapa Maori were also disturbed, and some of the settlers in that district had asked that blockhouses be erected there, though curiously enough the sheep-run men, the most isolated and exposed of the settlers, did not sign the petition. The Wairarapa Maori strongly objected to soldiers being sent to their district, and, as a matter of fact, none were sent.
Rumours of Maori raids in 1860 led to the erection of two blockhouses near Wellington, the one herein described and another near the bridge at the Lower Hutt. A number of Volunteer corps were also formed, and these became numerous in the land. The blockhouses were not actually utilized as refuges, simply because those raids never came off The Wairarapa Maori never became openly hostile. They probably remembered the answer given by a local chief to Te Rangihaeata in 1846, when the latter wanted Wairarapa to join him in a raid on Wellington—“Kei a wai he tahurangi maku?” (With whom is a tahurangi for me?) Tahurangi was the Maori name of the old-fashioned red blankets. The wise chief knew that to slay the pakeha would be to cut off the supply of European products, hence the red blanket saved Wellington. The memory of those old-time fears and dangers has passed away now, and no one worries about Maori raids.
The following is taken from the New Zealand Spectator, of Wellington, for the 5th September 1860:—
Sealed tenders in duplicate will be received at this office until Wednesday at noon of the 5th September next for the erection of
Stockade and Blockhouse
at the Upper Hutt, on McHardy's Clearing, according to plans and specifications No. 1 and 2.
Further particulars can be obtained upon application to Corporal Tapp, Royal Engineers, at this office.
Persons may tender for either Plan No. 1 and No. 2, or both. The lowest tender will not necessarily be accepted of.
W. Rawson Trafford
,Commanding Wellington Militia and Volunteers.
The defences consisted of a stockade and trench, with a two-storied blockhouse in one corner. The stockade, which has long been pulled down, was 9 ft. high and bullet-proof, as described below, though its form of loopholes is not given. The blockhouse projected outside two faces of the stockade so as to act as a flanking angle, the opposite corner being provided with a bastion as shown on the plan: thus each covered two curtains or faces. The northern and western curtains were each commanded by eight loopholes in the blockhouse, four on each floor. The western and southern sides of the stockaded area still show a parapet on the outer side of the fosse, or trench. Presumably the stockade occupied this low parapet, while the defenders would occupy the fosse inside it.
The space enclosed inside the trench, is 30 yards east and west, and somewhat more north and south. The measurements given in the report would douhtless be those of the line of stockade. The trenches now contain a considerable amount of debris, but were probably 2 ½ ft. or 3 ft. deep originally, the width being about 5 ft. at the bottom. The spoil from these trenches was evidently used to form the parapet, of which, however, we now see no sign on the north and east sides. The entrance to the enclosure was probably at the side of the blockhouse where for a space of 18 ft. no signs of a trench are to be seen.

The blockhouse is in a good state of preservation, the timber sound and still showing in places the marks of the circular saw; it was probably cut in Cruickshank's mill, the first to be erected in this vicinity, which produced some fine totara timber, The ground floor is divided into two rooms, the larger one containing the staircase, as also a small room in the south-west corner, like the sergeant's cubby-hole in a military barrack-room. Four sides of the ground floor present loopholed walls, the two interior walls being blank, save for the doorway and two windows as shown. There are twenty-four loopholes, as marked, not including three higher up to be occupied by persons stationed on the staircase. These loopholes are rectangular, formed with 1 in. timber, with the smaller end outward, the inner and larger orifice being 8 in. by 6 in. Some are still plugged with the original tompions—solid blocks of timber. The walls are flush-lined with 1 in. boards, and the outside weatherboarded with the same; studs, 6 in. The interior space is filled with fine gravel.
The upper floor is in one room, and is pierced with loopholes all round, on all six faces. The southern end has but two loopholes, but the two windows there are probably modern and not a part of the original plan. The west and north faces have each eight loopholes. The two interior walls have three each, two long vertical ones and a small square one between them. Two of these appear in the illustration. Not being a disciple of Vauban, the writer is unable to explain why these elongated loopholes should appear in two walls only, and those both interior faces. On the outer side these loopholes are 36 in. by 3 in., but the inner part is wider.
The blockhouse is built on piles, and roofed with corrugated iron; height of walls, 18 ft.
The magazine was a small building, 9 ft. by 5 ft. in size, originally lined, and probably with gravel-filled walls. Outside the blockhouse is a small ditch of unknown use, for presumably the stockade did not extend along outside the north and west sides of the blockhouse. The place seems to have been used as a residence at some time, and a stove has been used in the upper floor. Again, the place seems to have been utilized as a chicken-ranch at no distant period.
The well was covered over with timber, as it appears in the photograph (Plate II, fig. 2). The bastion shows no signs of having contained any small flanking blockhouse, such as we constructed in Taranaki as late as the “seventies.” From the trench outside the bastion a covered drain runs to a stream-channel, evidently designed to carry off storm-waters from the trench. A part of the outer scarp of the trench at the south corner of the bastion has been neatly faced with stones, reminding one of the Koru pa at Oakura.
No trace of a parapet is seen on the eastern and northern faces of the defence; the interior of the defended area is level ground, which extends far out on all sides.
(An outpost of singular form was erected at Taita in 1846, and was occupied by Militia for some time. The following appeared in the Wellington Independent at the time: “The troops and native allies in the Hutt have been forming an entrenched camp at Taita, in the shape of two squares connected at an angle of each, and having a communication from one to the other.” The main post of that period was Fort Richmond, at the Bridge, Lower Hutt.)
The Australian and New Zealand Gazette of the 17th October, 1860, contains the following: “The natives in the Wellington district still continue quiet, but the settlers are, as they ought to be on the alert. The

Militia has been called out both in Wellington and Whanganui, all the disposable rifles have been distributed, and two stockades are being erected in the Hutt district.”
The same publication in its issue of the 24th November, 1860, giving Wellington news up to the 7th September, quotes the following from the Wellington Independent: “A stockade is about to be erected at the Upper Hutt, and the one now erecting at the Lower Hutt is rapidly progressing. Recently, at the request of several gentlemen of the Hutt, the contractor supplied them with a target made the exact thickness of the sides of the stockades and filled with screened gravel, which was carted to a suitable place under the superintendence of Captain Carlyon, Lieutenant Ludlam, and Corporal Tapp, of the Royal Engineers. The firing commenced at 120 yards, shortening the distance until within five paces, when several rounds were fired from three different descriptions of rifles, likewise from one of the percussion muskets. On examination of the target the result proved very satisfactory, sixteen having struck the centre, but not one had passed through, the balls flattening as soon as they come in contact with the gravel, thus proving the efficiency of the present works.”
“A memorial for the erection of stockades has been sent to the Governor from about sixty of the residents in the small-farm neighbourhood of the Wairarapa. It is worthy of note that none of the sheep-farmers whose homesteads are scattered over the valley, and whose property would have to be abandoned should an outbreak occur, have consented to sign it.”
The Hutt Stockade.
The following particulars of the blockhouse and stockade erected at the Lower Hutt at the same time is culled from the Spectator:—
“Through the courtesy of Corporal Tapp, of the Royal Engineers, who has been sent down to superintend the works, we have been favoured with an inspection of the plan for the stockade and blockhouse to be erected at the Hutt. The site selected is a paddock opposite Jillet's Hotel, known as Plowman's land. The stockade will be 95 ft. square, with walls 9 ft. high, rendered bullet-proof to 6 ft. by the interstice between the inside and outside planking being filled with shingle. The blockhouse, which will be in the south-west corner, the nearest the bridge, will be two stories high, with galvanized-iron roof, and rendered bullet-proof throughout by the same means as that used for the stockade. Its dimensions will be 30 ft. by 30 ft., with outside flanks of 15 ft., with loopholes on all sides and in both stories. In the opposite or north-east corner will be corresponding flanks or loopholes. The magazine will be 8 ft. by 4 ft., by 7 ft. high. The blockhouse will be built so as to protect the Wairarapa and Waiwhetu Roads, the bridge, and the ferry. Mr. W. Taylor's tender, £725, has been accepted, and the works will be commenced next week, the contract time for their completion being three months from the acceptance of the tender.”
In this extract we see what the nature of the stockade was at the Upper Hutt, the two being constructed on the same plan. Some of the loopholes are plainly seen, while those blocked with tompions are scarcely discernible.

Art. III.—The First New Zealand Navy; with some Episodes of the Maori War in connection with the British Navy.
[Read before the Wellington Philosophical Society, 21st October, 1919; received by Editor, 21st September, 1920; issued separately, 27th June, 1921.]
Plates III–VI.
The early volumes of the Illustrated London News contain many illustrations of New Zealand scenes and incidents. I was particularly interested in those shown in the issue of the 30th January, 1864, among which was one of “the gunboat ‘Pioneer’ at anchor off Meremere, on the Waikato, reconnoitring the native position.” On looking into the subject of New Zealand's first navy I found that New Zealand had about that time quite an imposing fleet, which was manned from ships of the British Navy then on the station. On further search I found that the colony possessed a gunboat as far back as 1846. In the early days of settlement many requests had been made to the Mother-country to provide the colony with one or two armed vessels, but without success. It has been difficult to piece together the story of New Zealand's first navy from newspaper and official records and personal narratives, the censor having apparently been at work even in those far-off days.
An official statement of “Revenue and Expenditure for 1846” contains the item, “Purchase, &c., gunboat for Porirua Harbour, £100 17s. 11d.” A newspaper records the information that H.M.S. “Calliope's” pinnace and two whaleboats had been sent to Porirua, and in a later issue it is mentioned that the “Tyne's” long-boat had been lengthened for service. The “Tyne” was a barque which had ended her voyage from London to Wellington on the rocks off Sinclair Head, Cook Strait, on the 3rd July, 1845. McKillop in his Reminiscences says, “A ship's boat had been purchased and converted into a gunboat by the carpenters of the ‘Calliope,’ mounting a 12-pounder carronade.” A brass gun was also placed aboard. (Plate III, fig. 2.) The “Calliope” took the boat to Porirua on the 11th July, 1846. Midshipman McKillop was installed in command. He says that he secured the addition of six more bluejackets and two gunners lent by the officer in command of the Royal Artillery detachment then stationed at Wellington. McKillop came into contact with the Maori at the Pauatahanui head of the harbour on the 17th July; shots were exchanged, but, as he had “taken the precaution of lashing the men's beds up in their hammocks and fastening them round the boat, making a bullet-proof breastwork, which afforded great protection to the crew,” no damage was sustained, except that the brass gun burst at the first shot. For meritorious work at Porirua Midshipman McKillop received great praise from Lieut.-Governor Grey, and was promoted to be mate of H.M.S. “Driver.”
The gunboat was used for some time at Porirua on patrol duty, and was then taken early in 1847 to Wanganui, where it was commanded by Lieutenant Edward Holmes, H.M.S. “Calliope,” who was assisted by Naval Cadet H. E. Crozier, of the same ship. Crozier accidentally wounded a native chief with a pistol, and this was the direct cause of the Gilfillan

murders. The natives demanded the surrender of the youth, which, of course, was refused. Crozier was replaced by Midshipman John Carnegie. During the months of April and May, 1847, good work was done by the gunboat. On the 19th May, in consequence of the gunboat being injured from its own firing, Lieutenant Holmes moved his 12-pounder on board the “Governor Grey” (Plate IV, fig. 1), a Wanganui-built schooner of 35 tons, from whose unbarricaded deck he continued to fight until the enemy retired.
Captain J. H. Laye, 58th Regiment, who commanded the forces at that time, reported to the Governor, “To Lieutenant Holmes I am exceedingly obliged; the efficiency of the gunboat under his command (which was exposed to the fire of the enemy the whole of the day), his alertness with her at all times, and cordial co-operation, I am only too happy to bear testimony to.”
In a despatch from Wanganui dated the 21st February, 1848, Major Wyatt, O.C., states, “The repairs to the gunboat are progressing.”
On the outbreak of hostilities in the Taranaki Province in 1860 the Government advertised for two vessels suitable for gunboat service. In April the schooner” Ruby,” 24 tons, recently launched from a shipbuilder's yard, was purchased by the Defence authorities, renamed” Caroline” (Plate IV, fig. 2), and armed with a 32-pounder gun, and a supply of ammunition from H.M.S. “Elk.” The cost of the schooner was £630; the cost of stores, fittings, and the cannon, £300. Mr. Smyth, of H.M.S. “Niger,” who had distinguished himself at the attack on Waireka, near New Plymouth, was appointed to the charge of the gunboat. He hoisted the pennant on the 14th April, 1860, and sailed from Auckland for Manukau on the 17th April. Mr. Hannibal Marks, “an old, experienced, and dauntless seaman, who knew every nook and inlet of the coast,” was appointed pilot and sailing-master, being later appointed to command. The vessel acted as guardship on the Manukau Harbour, also being used as a despatch-boat between that port and New Plymouth. Later, she was transferred to Auckland, where she was chiefly used as a despatch-boat. I can find no record of her being engaged in any action. Her commission ended on the 12th October, 1863, and she was sold out of the service, the purchaser being Captain Davidson. Her name was changed back to “Ruby,” and for many years she traded between Wellington and Kaikoura. She was wrecked off Jackson Head in 1879.
An urgent call for help had been sent to Australia, and in reply the Government of Victoria had lent its warship, the steam-sloop “Victoria,” Captain Norman, which arrived at New Plymouth on the 3rd August, 1860, bringing Major-General Pratt, C.B., Commander of the Forces in Australia, and his staff. General Pratt took command of the troops in Taranaki until the arrival of Lieut.-General Cameron in May, 1861, when he returned to Australia in the “Victoria.” The “Victoria” also brought a detachment of troops from Australia during this period, and was engaged on the coast on various duties, including the transferring of refugees from New Plymouth to other ports. Officers and men from this vessel took part in some of the Taranaki land engagements.
On the 28th March, 1860, Captain Peter Cracroft, H.M.S. “Niger,” with a force of sixty men and a 24-pounder rocket-tube, landed and captured the Maori pa at Waireka, Taranaki, incidentally relieving a party of Volunteers who were in difficulties. This is the action in which Seaman William Odgers won the first Victoria Cross to be awarded for service in New Zealand. He was the first man to enter the pa, and he hauled down

the Maori flag. He was promoted to be a warrant officer by the Admiralty on the 26th June, 1860, and the Cross was presented to him on parade at Devonport, England, July, 1862. Lieutenant Blake, who, with some men of the “Niger,” took an active part in the military operations, was promoted to be commander for his services, later taking command of H.M.S. “Falcon” on the New Zealand station. The “Niger” had shelled the Warea Pa on the 20th March.
A Naval Brigade under Captain (later Commodore) F. Beauchamp Seymour, afterwards Lord Alcester, was stationed at Waitara, where Captain Seymour was wounded, June, 1860, at the attack on the Puketakauere Pa. The brigade, which was in service 1860–61, was composed of men and officers from H.M. ships “Niger,” “Pelorus,” “Cordelia,” “Iris,” “Elk,” and the Victorian steam-sloop “Victoria.”
In 1862 the Government purchased the paddle-steamer “Avon” for £2,000. This steamer, which was 60 ft. in length, 14 horse-power, 27 tons register, and drawing 3 ft. of water, had been brought from England in sections and put together at Lyttelton in 1861. She had been engaged in the trade between Lyttelton, Heathcote, and Kaiapoi. On the 22nd November she left Lyttelton in charge of Lieutenant Easther with a crew of fifteen men from H.M.S. “Harrier,” in tow of that vessel. Lieutenant Easther retained command until the close of the Waikato War. Mr. Ellis, who is still living (1920) in Auckland, was engineer. The vessels arrived on the 26th November at Onehunga, where the “Avon” was refitted and armoured for service on the Waikato River. She assisted in the rescue of survivors from the wreck of H.M.S. “Orpheus,” on the Manukau bar, 7th February, 1863, the men being transferred from the steamer “Wonga Wonga,” which happened to be crossing the bar at the time of the disaster.
The “Avon” was towed to the Waikato Heads on the 25th July, 1863, by H.M.S. “Eclipse,” Commander Richard C. Mayne (Plate V, fig. 1). Thirty men were transferred from the “Eclipse,” and Commander Mayne took the “Avon” up the river to the Bluff—a little below where Mercer now stands. On the 6th August Captain Sullivan, H.M.S. “Harrier,” senior naval officer in New Zealand, took the vessel on a reconnaissance as far as Meremere, where the Maori opened fire, which, on completion of observations, was replied to from the “Avon's” 12-pounder Armstrong gun and a 12-pounder rocket-tube.
While the “Avon” was being fitted at Onehunga four large barges were brought overland from Auckland. These were also armoured with an iron-plate covering, and pierced for rifles and sweeps, or oars, this work being done under the superintendence of Captain Mercer, R.A., who was later killed at Rangiriri.
The “Avon” was on service during the course of the Waikato War. On the 18th February, 1864, through striking a snag in the Waipa River, she became partly submerged. She was used for a time as a coal-hulk at Port Waikato, which in those days was a busy place, with building and repairing shops. Later the “Avon” was renamed “Clyde,” and was occupied in mercantile trading in the run between Tamaki and the Thames. In 1876 her paddles were dismantled and twin screws substituted. She was broken up in Auckland about 1883.
In 1860 a small paddle-steamer, the “Tasmanian Maid,” 53 tons register, 36 horse-power, which had been trading between Nelson, Wairau, and Wellington, was sent over by the Nelson people to bring the women and children from New Plymouth if necessary. She was then used as a

despatch-boat between New Plymouth, Waitara, and Onehunga. In 1862 she was engaged in trade from Auckland to Coromandel, and about Auckland Harbour. In June, 1863, she was purchased by the Government for £4,000. She was renamed “Sandfly,” and armoured, being also armed with two 12-pounder Armstrong guns. Lieutenant Hunt, H.M.S. “Harrier,” hoisted the pennant on the 23rd June, 1863, and his crew consisted of twenty-two men from the warships. On the 12th October Captain Marks, of the gunboat “Caroline,” was transferred to the “Sandfly,” while Lieutenant Hunt was transferred to the paddle-steamer “Lady Barkly,” which had been purchased by the Government and partially plated, when it was decided that she was unfit for service, as intended, on the Waikato River. She was used for transport work in and from the Manukau Harbour. The “Lady Barkly” is still (1920) running on the coast as a screw-steamer under the name “Hina.” The “Sandfly” was stationed on the east coast of the North Island, her headquarters being Auckland. She took part in the blockade of the Firth of Thames and the Tauranga campaign. She captured on the 31st October the cutter “Eclair,” a vessel of about 20 tons, owned by the Maori, and loaded with provisions. In 1865 the “Sandfly” was sold by the Government, after a short service about Cook Strait transporting troops to Wanganui, and doing a little survey work for the Cook Strait submarine cable. The new owners changed her name back to “Tasmanian Maid,” and she was wrecked off New Plymouth on the 16th January, 1868.
In 1863 the Imperial Commissariat Department purchased the 80-horsepower steamer “Alexandra” for transport work. She cost £13,000, and was also wrecked somewhere near New Plymouth, 9th August, 1865. In 1863 the Government owned a sailing gunboat, “Midnight,” but I have not been able to trace her commission, except that she appears to have been on service on the east coast, north of Auckland.
In a memorandum dated 20th October, 1863, the Minister of Defence stated, “Towards the end of 1862 the Government determined to place a small steamer on the Waikato, and after some inquiry the ‘Avon’ was purchased for the purpose. Her draught of water is too great to be available as is desirable; but, notwithstanding this disadvantage, the vessel has been of great service. The importance of having a suitable steamer for the navigation of the Waikato determined the Government to have such a vessel constructed in Sydney, and after many delays and much anxiety the gunboat ‘Pioneer’ (Plate VI, fig. 1) has been obtained—a vessel, it is believed, well adapted for the purpose.” The “Pioneer” was launched from the shipyard of the Australian Steam Navigation Company, Pyrmont, Sydney, on the 16th July, 1863, having been under construction for a period of about seventeen weeks, the superintending engineer of the work being Mr. T. Macarthur, of the company's staff. A report in a local paper, the Empire, says, “Yesterday morning there was launched from the A.S.N. Co.'s patent slip, Pyrmont, a rifle gunboat for the New Zealand Government, and intended for the service of the inland waters of the Waikato district. She is intended to carry 300 men, on a light draft of water. Her dimensions are 140 ft. in length, 20 ft. beam, 8 ft. 6 in. depth of hold, and draws only 2 ft. 6 in. of water. She will be propelled by an overhanging stern wheel, 12 ft. diameter, 7 ft. broad, driven by two engines, each 30 horse-power. She is constructed of ⅜ in. iron, which is pierced for rifles, and which will render her ball-proof. She is fitted with watertight

compartments. The boilers were placed 54 ft. forward of the engines for the purpose of keeping the vessel on an even keel.” The Empire of the 15th September further reports, “On the vessel's trial trip her speed was tested from Fort Denison to Bradley's Heads, a distance of 1 mile and 150 yards A smart N.E. breeze prevailed, but with this disadvantage the distance was run down in 8 minutes 12 seconds, and up in 6 minutes 53 seconds, giving a speed of nearly 9 knots, with 32 revolutions per minute, with 60 1b. on pressure of gauge, and a very small consumption of coal. Her speed exceeded the builder's expectations by one mile per hour. She is fitted with two sliding keels—one forward, one aft. The officers' cabins are situated aft, and the soldiers' apartments forward; they are very large and lofty. She has a flush deck, on which are placed two cupolas, 12 ft. in diameter and 8 ft. high, each pierced for rifles and 24-pounder howitzers. The commander's station was in a turret above the engine-room, which was also shot-proof and placed aft.” She was provided with space for the storage of 20 tons of coal, and it is interesting to note that while on the Waikato she used local coal, being the first steamer to do so. The Hon. (later Sir) Francis Dillon Bell, a member of the Ministry, represented the New Zealand Government on the occasion of the “Pioneer's” trial. For the trip to New Zealand the stern wheel was removed, and three masts provided to carry sail. The cost of construction was £9,500.
After shipping a supply of ammunition, consisting of 60 cases shot and shell, 600 cartridges for 24-pounders, 1,000 tubes, 10,000 Terry's rifle cartridges, 12,000 caps, and 18,000 revolver-cartridges, the “Pioneer,” in tow of H.M.S. “Eclipse,” left Sydney on the 22nd September, reaching Onehunga on the 3rd October, after a rough trip. The officers attached to the vessel for the trip were Lieutenant G. R. Breton, late of H.M.S. “Iris”; Lieutenant O'Callaghan, H.M.S. “Miranda”; and Mr. Jeffrey, engineer; with a crew of twenty-five men. On the 24th October the “Pioneer,” with two companies of seamen from H.M.S. “Curaçoa,” was towed by H.M.S. “Eclipse” to the Waikato. At the same time the four armoured barges, or gunboats, were also taken to the river. While on active service each of the gunboats was in charge of an officer from H.M.S. “Curaçoa.” I am informed by Admiral Hammick (then a sublieutenant), who was in charge of one, which was named the “Ant,” that one was commanded by Midshipman C. S. Hunt, who had been saved from H.M.S. “Orpheus” when that vessel was wrecked on the Manukau bar; another was in charge of Midshipman F. Hudson. The fourth, which was named the “Midge,” was commanded by Midshipman Foljambe. Mr. Foljambe in his Three Years on the Australian Station (1868) tells us that the boat was armed with a 12-pounder gun and a 4.4 in. brass Cohorn mortar, and carried a complement of seven men. These boats were used in the different operations on the Waikato and its branches, and also in carrying stores. Mr. Foljambe was the father of the late Governor-General of New Zealand, Lord Liverpool.
On the 29th October the “Pioneer,” piloted by Mr. Chandeler, and flying the broad pennant of Commodore Sir William Wiseman (“Curaçoa”), after landing at Whangamarino, which commanded the Maori position at Meremere, two 40-pounder Armstrong guns, brought by the “Curaçoa” from Sydney, conveyed Lieut.-General Cameron, commander of the troops in New Zealand, on a reconnaissance. (Plate V, fig. 2.) Shots were exchanged, but no damage was sustained by the vessel, which returned to headquarters. On the 31st October the “Pioneer” again proceeded up the river as far as Rangiriri, the Maori stronghold. A spot about six

miles above Meremere was selected as a landing-place for a force of 640 men and twenty-one officers, with two 12-pounder Armstrong guns This force was embarked on the “Pioneer” on the 1st November, and landed without opposition During the afternoon it was found that the Maori had abandoned their position at Meremere, which was then occupied by a party of 250 seamen, under Commander Mayne (“Eclipse”), and 250 men of the 12th and 14th Regiments, under Colonel Austin, from Koheroa. This force was reinforced next day by detachments from the 12th, 14th, 18th, and 70th Regiments, amounting to 500 men.
On the 20th November General Cameron, with a force of 860 men, attacked Rangiriri. To assist in the operations an additional 300 men of the 40th Regiment were embarked on the steamers, to be landed at a selected point, so that they might make an attack on the rear of the main line of the Maori entrenchments while the main body attacked in front. Owing to the wind and current the “Pioneer” and “Avon,” with two of the gunboats, were not able to reach the landing-place decided upon. After a preliminary barrage by the Royal Artillery 12-pounders, under Captain Mercer, and the naval 6-pounder, under Lieutenant Alexander (“Curaçoa”), the main body attacked the main line of entrenchments and drove the enemy to the centre redoubt, while the party of the 40th Regiment, who had been landed sufficiently near to reach their position, were able to pour a heavy fire on a body of Maori, who were driven from their position and fled towards the Waikare Lake, where a number of them were drowned. The centre redoubt, still holding out against the troops, was attacked by a party of thirty-six men of the Royal Artillery, under Captain Mercer, who was mortally wounded, then by a party of ninety seamen under Commander Mayne, who was wounded. Both attempts were unsuccessful, as was another by a party of seamen under Commander Phillimore (“Curaçoa”), who used hand-grenades. As it was now nearly dark, the General decided to wait until daylight, when it was found that the white flag had been hoisted, and 183 Maori surrendered. Midshipman Watkins (“Curaçoa”) and five men of the Naval Brigade were killed; while, in addition to Commander Mayne, Lieutenants Downs (“Miranda”) and Hotham (“Curaçoa”) (afterwards Admiral Sir C. F. Hotham) and five men were wounded.
In a letter from Ngaruawahia dated the 4th December Wiremu Tamehana (William Thompson), the Maori leader, said that he had lost all his guns and powder. “It is your side alone which is still in arms—that is to say, the steamer which is at work in the Waikato, making pas as it goes on; when they finish one, they come a little farther and make another. Now, then, let the steamer stay away; do not let it come hither. That is all.” But, as the Maori king's flag had been hoisted at Ngaruawahia in the first place, it was decided that the Queen's flag should fly there.
On the 2nd December General Cameron moved on from Rangiriri. As the outlets from Lake Waikare were not fordable, the troops, with their tents and baggage, were conveyed up the river in boats manned by seamen of the Royal Navy, under Commander Phillimore. The following day the troops again moved on, and encamped abreast of the island of Taipori. Here General Cameron was delayed, waiting for provisions, until the 7th, when he moved the camp about five miles farther up the river, and met the “Pioneer,” which had safely passed the last shoal below Ngaruawahia. Next day he went with Commodore Wiseman in the “Pioneer” to Ngaruawahia, which he found to be deserted. He immediately returned to the camp, and, after embarking 500 men of the 40th and 60th Regiments,

again proceeded up the river, and landed at Ngaruawahia, where he established headquarters. On the 26th December 300 men of the 50th Regiment left Onehunga on the transport “Alexandra” and the chartered steamer “Kangaroo” for Raglan. On the 28th, 250 men of the Waikato Militia, under Colonel Haultain, embarked on the steamer “Lady Barkly” for the same destination.
The memorandum of the Defence Minister, dated the 20th October, 1863, stated, “But so strongly has the necessity been felt for providing means for commanding the navigation of this important artery of the country, and for preparing means of communication with the military settlers to be located in the Waikato country, and of transporting the necessary supplies, that two smaller steamboats of very light draft of water have been ordered to be constructed in Sydney. These vessels are being constructed of iron. They will be brought from Sydney in sections, on board a vessel laden with coal, direct to the Waikato River, and put together at the Waikato Heads. These two boats are also specially designed of great power, so as to be used as tugs, and thus provide means of transporting supplies up the river.”
These two boats were named “Koheroa” and “Rangiriri,” probably after the two actions fought on the Waikato. (Plate VI, fig. 2.) The builders were Messrs. p. Russell and Co. A Sydney newspaper, in describing one of the boats, said, “This boat, which can easily turn in the space of a little more than her own length, may follow the bendings of such a river as the Waikato in its narrowest part, and may either be used as a steam-tug, towing flats for the conveyance of troops, or may be armed with a gun at each of the singular-looking portholes, which are closed with folding doors, in the middle of the lower deck; while the bulwarks on each side are pierced with twenty or thirty loopholes for rifle shooting.” The “Koheroa” was built in less than six weeks from the time the contract was received from Mr. James Stewart, C.E., who had been sent to Sydney by the New Zealand Government to superintend the construction. The sections of the “Koheroa” were brought from Sydney to Port Waikato by the steamer “Beautiful Star.” The first bolt was riveted on the 4th January, 1864, and the vessel was launched on the 15th. I can find no record of these boats being engaged in hostilities, but they were used for transport work for some time.
By the end of January, 1864, General Cameron's headquarters had been moved to Te Rore, on the River Waipa, from which, on the 20th February, with a force that included a naval detachment of 149 men and ten officers, he moved across the Mangapiko River to Te Awamutu, where headquarters were established. During the last few days of this campaign (February, 1864), while the “Avon” was patrolling the river, a shot reached the vessel and killed Lieutenant Mitchell, H.M.S. “Esk.”
From Ngaruawahia Commodore Wiseman and a party of naval and military officers went up the Horotiu River a distance of twelve miles, then transferred to the “Koheroa,” and, proceeding twenty-two miles farther on (to near the site of the present town of Cambridge), located the Maori position, and returned. This incident ends the story of the British Navy on the Waikato River, though the steamers were used for some time longer on transport duty. Colonial crews were placed on board, and the Naval Brigade's operations were transferred to the Tauranga district.
General Cameron transferred his headquarters to Tauranga on the 21st April, 1864. Reinforcements, which had been sent from Auckland on

H.M.S. “Harrier” and “Esk,” arrived at Tauranga on the 26th April. On the morning of the 27th the Maori had fired heavily on Fort Colville, but they were shelled out of their position by H.M.S. “Falcon” and the colonial gunboat “Sandfly.” Captain Jenkins (“Miranda”) took charge of the “Sandfly,” which with the “Falcon” pursued the Maori who were retreating along the beach. Two 12-pounder Armstrong guns had been placed aboard the “Sandfly”; one, from the “Falcon,” was manned by “Miranda” men, and the other, from the “Esk,” was manned by men from that ship. Both ships shelled the whares at Otamarakau. At 3 p.m. firing ceased, as the enemy had finally disappeared. Captain Hannibal Marks, of the “Sandfly,” and Senior Lieutenant Hope, in command of the “Falcon,” were mentioned in despatches for “zeal and exertion.” The gunners from the “Miranda” and “Esk” were mentioned for the “extraordinary precision of their fire from the 12-pounder Armstrongs.”
On the 29th April General Cameron made the attack on Gate Pa, with a force of 1,700 of all ranks, including a Naval Brigade of four field officers, six captains, seven subalterns, thirty-six sergeants, five drummers, 371 rank and file. One hundred and fifty seamen and marines under Commander Hay (“Harrier”), and an equal number of the 43rd Regiment under Lieut.-Colonel Booth, formed the assaulting party. Commander Hay and Lieut.-Colonel Booth fell mortally wounded. Captain Hamilton (“Esk”) was killed. The casualties of the Naval Brigade were: Killed or mortally wounded: “Curaçoa”—Lieutenant Hill and one man; “Miranda”—one man; “Esk”—Captain Hamilton and three men; “Harrier”—Commander Hay and three men; “Eclipse”—one man. Wounded: “Curaçoa”—five men; “Miranda”—Lieutenant Hammick and eight men; “Esk”—Lieutenant Duff and ten men; “Harrier”—four men. Total dead, 12; wounded, 29. Most of the wounded cases were classed as “severe” or “very severe.”
For bravery in carrying Commander Hay, when wounded, off the field, Samuel Mitchell, captain of foretop, and captain's coxswain, was awarded the Victoria Cross, which was presented to him by Sir J. Young, Governor of New South Wales, in Sydney in October.
On the 21st June Colonel Greer, commanding the Tauranga district, attacked the enemy at Te Ranga, and while this attack was being made a naval force from the “Esk” and the “Harrier” was landed for the protection of the camp. Lieutenant Hotham was mentioned in despatches.
Lieut.-General Sir D. A. Cameron left Auckland in January, 1865, for Wanganui on H.M.S. “Falcon,” calling at New Plymouth en route. He arrived at Wanganui on the 20th January, and on the 5th February moved camp to Waitotara, one and a half miles from the mouth of the river. The paddle-steamer “Gundagai” entered the river during the evening, bringing provisions for several days. On the 16th February General Cameron marched to the Patea River, which had been entered by the “Gundagai” and “Sandfly” the day before. The General stated in his report, “They crossed under the most favourable circumstances; but as the latter [“Sandfly”] had not more than a foot to spare at high water, it will not be prudent to bring her into the river again.”
This covers, as far as I can discover, the operations of our first naval adventures. The vessels seem to have done good work, and all that was expected of them. It is to be hoped that the “Calliope's” gunboat, the schooner “Caroline,” the paddle-steamers “Avon” and “Sandfly,” and the river-steamers “Pioneer,” “Koheroa,” and “Rangiriri,” and the men of the British Navy who manned them, will not be forgotten in our histories.

Art. IV.—Notes on a Geological Excursion to Lake Tekapo.
[Read before the Philosophical Institute of Canterbury, 7th July, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
During the Easter recess of the present year the author paid a visit of several days' duration to the country lying to the east and north of Lake Tekapo, in the Mackenzie country, the visit being primarily to determine the stratigraphical relations of the coal reported to occur in Coal River, and its bearing on the origin of the Mackenzie intermontane basin. The question of the origin of this basin, the greatest in the alpine region of Canterbury, was discussed to some extent by Kitson and Thiele (1910, p. 431), when these authors concluded that it was of structural origin, a conclusion largely based on the observations of McKay on the Tertiary sedimentaries which occur near Lake Ohau and in the lower part of the area. This lower part, however, they do not appear to have visited; while the structural origin of the upper part in the vicinity of Lakes Pukaki and Tekapo, which they did examine, was stated as a probability, without giving distinct evidence. Largely influenced by the great weight of Captain Hutton's opinion, they concluded that the tectonic movements which initiated its formation dated from pre-Cainozoic times; that a depression of the land took place in mid-Cainozoic times, and that the sea then invaded the valleys and deposited marine sediments; that the area was raised at the close of the Cainozoic era with some slight deformation, and that the resulting surface was modified by glacier erosion and deposition. This is a brief summary of the position as far as the origin of the basin is concerned.
Since their paper appeared there has been a general swing of mature geological opinion in the direction of the hypothesis that the chief structural movements in the alpine region of the South Island took place in late Jurassic or early Cretaceous times, when the Alps were raised as a folded mountain-chain and during a subsequent period of stillstand of the land a peneplain was formed as the result of prolonged subaerial erosion; that on lowering this surface below sea-level a more or less continuous veneer of Tertiary marine sedimentaries was laid down on it; and that at the close of the Tertiary era an epeirogenic movement ensued, with attendant faulting, warping, and, in some cases, of folding of the beds, which resulted in the formation of an elevated tract known as the Southern Alps. Included in this are several remarkable intermontane basins, of which the Mackenzie country is one. The second hypothesis is the one favoured by the author, and the visit to the district under consideration was made in order to ascertain if the facts furnished by it fitted in with this hypothesis.

General Physiography. (See map.)
The district under special consideration lies to the north-east and north of Lake Tekapo, which occupies the most easterly of the three main valleys leading from the highest section of the Southern Alps out on to the sloping plain region of the Mackenzie country, which owes its formation largely to the aggrading action of the great rivers which formerly flowed from the fronts of glaciers issuing from those valleys. The basin is bounded on the east by the Two Thumb Range, which branches off the main divide of the Southern Alps in the vicinity of McClure Peak (8,192 ft.), and runs south without a break until it reaches the Ashwick Saddle and Burke's Pass, whence it continues southward as the Hunters Hills. The range is highest at its northern end, where it is dominated by the great mass of Mount d'Archiac (9,279 ft.); but high peaks are found farther south, such as Mount Chevalier (7,910 ft.), the Thumbs (8,338 ft.), and Fox's Peak (7,604 ft.); while for long distances it is over 7,000 ft., and rarely sinks below 6,000 ft. It thus forms a thoroughly effective divide between the north-eastern part of the Mackenzie basin and the valleys of the Rangitata and Opihi, which lie to the east. From this range important ridges stretch down towards Lake Tekapo, such as the Sibbald Range, which divides the Godley Valley from that of the Macaulay, with Mounts Sibbald (9,181 ft) and Erebus as its leading peaks, and the Richmond Range, which reaches south-west towards the middle of the eastern shore of Lake Tekapo. To the south of the Macaulay lies Mount Gerald, which, though not very high is a noteworthy feature of the landscape.
The chief rivers feeding the lake are the Godley and the Macaulay, the former rising in the main divide and the latter draining the country between the Sibbald Range and the Two Thumb Range. On the western side of the lake the chief streams are the Cass River and Mistake River; while on the eastern side the most important streams are Coal River and Boundary Creek, both of which flow first of all south-west and then west. The former follows along the northern flank of the Richmond Range and enters the lake at its extreme north-eastern corner, while the latter follows along the southern side of the range and enters the lake about the middle of the eastern shore.
The surface of Lake Tekapo is 2,321 ft. above sea-level, and it is therefore the highest of the great lakes of New Zealand. It has a length of about fifteen miles and a breadth of about three and a half in its widest part, and is somewhat quadrangular in shape. Its general surroundings are monotonous, and the country is now treeless except for the plantations in the neighbourhood of station-homesteads. The shores, too, are flat and wanting in bold features Only on the western side, in the vicinity of Mount John and the Mistake Range, do hills closely approach the lake; and in these cases they rise precipitously from the water's edge, and exhibit all the features of valley-walls whose bases have been sapped back by lateral glacial erosion.
On the eastern side the country rises gradually from just above lake-level to the foot of the spurs from the Two Thumb Range, such as Mount Gerald and the Richmond Range; and the profile of these slopes is evidently carried down to the bed of the lake, so that it has not the form of a true glacial trough, but rather of a widely open groove or depression. The lake is thus somewhat shallow—387 ft. was the maximum depth obtained by Ayson—and two small ice-scoured islands with outlying reefs near the lower end of the lake emphasize the fact that the solid bottom does not lie far below a large area of the water.

The whole country in the vicinity of Lake Tekapo has been heavily glaciated. Extensive areas of the lower levels are masked by a veneer of moraine; large travelled blocks everywhere dot the landscape, and some are exposed, partially submerged, along the shores of the lake. Owing to the completeness of this covering, exposures of rock in situ are rare below the steep slopes of the mountains. Scoured and grooved surfaces and smoothed landscapes are visible at higher levels. Numerous shelves of comparatively small elevation are characteristically developed as the valley widens out, especially on the section between Coal River and the Macaulay. These are strongly reminiscent of those to be seen near the Potts River in the Rangitata Valley, and near Lake Heron in the valley of the Upper Ashburton. In these cases the type of sculpture is associated with the erosion of a valley which has been at one time filled with non-resistant Tertiary sediments. Farther up-stream, however, a modified form of this sculpture is apparent where the ice has overridden the end of the spur between the Macaulay and the main valley, the rock being entirely greywacke, so that it is not dependent altogether on the presence of easily eroded rocks. A feature similar to this is recorded by Park (1909, p. 19) as occurring near Ben More, in the Wakatipu district. In this case, however, he attributes the feature entirely to glacier erosion, whereas the Tekapo occurrence seems partly due to erosion and partly to the deposit of morainic matter on the shelves so formed.
The extreme freshness of the evidence of ice-action suggests that the retreat of the ice was comparatively recent, a fact which is emphasized by the modifications of the valley-sides. The youthful stage of the drainage of some of the tributary creeks, too, with their deep, narrow, rock-bound gorges incised into the abraded surfaces, so smooth by contrast, strongly supports the hypothesis that the ice has but recently retreated from this region. This feature is specially well exhibited in the Waterfall Creeks, which enter the Macaulay from the east, just at the point where it is emerging from the rocky precipitous country on to the down area which lies on the flank of Mount Gerald.
One somewhat surprising feature is the absence of halting-stages in the retreat. There are no terminal moraines apart from the great one at the foot of the lake, and the coating of angular material seems to be somewhat thin. It is as if the ice disappeared simultaneously from long stretches of the valley and dropped the covering of moraine which then masked its surface. This loose material would be rapidly occupied by plants from the adjoining open spaces, so that the formation of a plant covering should not lag long behind the disappearance of the ice. The rapidity with which a bare shingle river-bed is covered with vegetation shows that no objection can be raised to the hypothesis of a recent rapid retreat of the ice on the ground that plants would not have had time or opportunity to spread and establish themselves on the glacier-swept areas. The evidence of rapid retreat with few or no halting-places is observable in the valleys of the other main rivers of Canterbury, especially the Rakaia and the Waimakariri.
On the higher country the usual forms resulting from glacial sculpture are to be seen, notably corries in all stages of complete and arrested development and of destruction by present-day ice and frost. The cirques, originally heading them after the retreat of the ice, are attacked by these agencies, the clear-cut walls disappear, the hollows becoming filled with debris. Especially is this the case when they are partially filled with snow Rocks roll down its frozen surface, especially in winter, and accumulate

at the lower margins of the hollows, simulating terminal moraines of the glaciers which once filled them.
A most beautifully developed corrie, fully a mile broad, occurs at the head of Stony Creek, a western tributary of the Macaulay. This is headed by a well-marked amphitheatre or cirque with steep rock walls; at their base are hollows now occupied by small ponds or swamps, the remains of old corrie lakes. The lower part of the basin was once filled by a deposit of Tertiary sands and clays with coal, but a great part of these has been removed, so that now there is a double basin inside the limits of the corrie. On the lower side, too below the spot where the coal has disappeared, there is the characteristic rock barrier, breached at one point, and through this opening, in a deep narrow notch, the stream draining the basin now flows. Before the coal-measures had been removed it must have presented a thoroughly typical example of a coomb or corrie.
Stratigraphy.
The great mass of the mountains of this region consist of greywackes, argillites, and slates of the Maitai series, to which may be assigned a Trias-Jura age. This time classification is based almost entirely on the similarity of the lithological character of the rocks to those with undoubtedly Trias-Jura fossils. This is, however, supported by the author's finding a fragment of dark-coloured argillite in the high country between the Godley and Macaulay Rivers which shows the unmistakable sculpture of Monotis salinaria. Not only the primary and secondary ribs occur, but also the peculiar and regular cross-sculpturing, so that the author has no reasonable doubt but that it belongs to that important Triassic fossil, and the find thus confirms the age of the beds as deducted from their lithological character. The finding of this fossil, and other finds reported lately from Arthur's Pass and the Hawdon River, suggest a wide extension of rocks of this age over the mountain region of Canterbury; but it must not be inferred that all the rocks of that area are of the same age. The presence of heavy bands of conglomerate containing pebbles of greywacke, in close proximity to beds with these fossils and in apparent conformable relations, suggests that there is an older set of beds in the region of similar lithological character which have furnished these pebbles, and therefore lying unconformably under it. The contention of Hutton and others that two distinct series of rocks occur in the mountains of Canterbury is apparently correct, but much more field-work will have to be done before they are definitely separated.
On the east side of Lake Tekapo, especially in the Richmond Range, the rocks show a submetamorphic facies; and slaty shales with a somewhat lustrous surface occur, and in all probability they grade into the true phyllites exposed near Fairlie on the flanks of the Hunters Hills and in the Kakahu Gorge, which resemble closely the phyllites of that belt of Otago east of the schists. I have been informed by Mr. Pringle, owner of Richmond Station, on Lake Tekapo, that marble occurs just over the divide to the east of the lake, on the Rangitata slope; and if the identification of the rock is correct it means that the metamorphic belt extends much farther north than has been recorded previously. Much less is known of the geological features of the western side of the Rangitata Valley than of any part of Canterbury, so that the occurrence of marble may well have escaped observation. The beds to the north and east of Tekapo have, according to the observations of the author, a general north-and-south strike, with directions west of north occurring freely.

Two exposures of Tertiaries are recorded for the first time from this district—(1) that in Coal River, and (2) that occurring on the western side of the Macaulay River on the Sibbald Range.
(1.) Coal River.—Exposures of sands and clays with coal occur in several places in the deep gorge which Coal River has incised in the down country to the north-east of the lake, and chiefly in the vicinity of the right-angle bend which the stream makes as it leaves the Richmond Range and runs straight to the north-eastern corner of the lake. The exposures, five in number, occur in places along the two miles of gorge stretching both above and below the bend, but they are so masked by moraine that they cannot be traced away from the stream, and the relations of the individual outcrops to each other are obscure. The exposure lowest in the course of the stream is distant about three miles from the road-crossing. Here are exposed greyish-white sands of uncertain thickness, capped by gravels, brownish owing to the presence of iron-oxide, which are apparently unconformable; above them lies morainic matter.
On the north side of the river, at the bend, occur sands and sandy clays weathering white or stained brown. The strike is apparently N. 10° W., and the dip to the east 35°, but there is some doubt about this observation. On the south side of the river, about 100 yards up-stream, are sandy clays with carbonaceous shales; and farther up still, at the mouth of a small creek coming from the Richmond Range, there is a patch of much-slipped country showing sands and sandy clays, some with distinct greenish tint.
After the intervention of a barrier of greywacke, capped in places by white sands, similar beds to those just mentioned occur nearly a mile up-stream on the south side. The following sequence occurs here, in ascending order: (1) White sandy clay, 4 ft.; (2) clays with reddish tinge, 8 ft.; (3) impure lignite, with carbonaceous shale, 2 ft. 6 in.; (4) argillaceous sands, stained brown in the lower part, yellow above, 15 ft.; (5) whitish sands, thickness uncertain. These are capped by brownish gravels, which may be conformable, but the exposure is so limited that it cannot be determined for certain These are succeeded unconformably by moraine.
The strike of the beds is north, with a dip to the east of 45°. This patch of sedimentaries has a fault-contact on the south-east margin with the older beds, the fault running north-east and south-west, and its continuation may account for the presence of the beds in the bend of the creek, as their south-eastern border has the same line as the fault. This patch owes its preservation, in all probability, to having been faulted down, and having thus been preserved from erosive agents. How far it extends under the morainic material to the north and south of the river is quite uncertain but brown gravels similar to those occurring near the stream are exposed farther north on the western slope of Mount Gerald, which suggests a continuation of the beds in that direction.
(2.) Stony Creek Beds.—These beds lie on the floor of a corrie on the western side of the Macaulay Valley, which is drained by Stony Creek. They lie about 4,000 ft. above the sea. There are two occurrences, separated by a barrier of greywacke. The lower one consists of the following beds, in ascending order: (1) White argillaceous sand; (2) greenish sandy clay; (3) brown coal, 2 ft. 6 in. thick, striking north and south, and dipping west 35° (the coal contains pieces of ambrite); (4) whitish sand, with yellow stain; (5) white sand, very fine in grain, with small amount of clay; (6) grey sandy clay.

The country is much slipped and the deposit comparatively thin, so that the true relations of the beds are uncertain, and their enumeration is in all probability quite incomplete. This is emphasized by the fact that pebbles of quartz, like those from the quartz drifts of Otago, occur in other parts of the basin, but they were not noticed in the series given above.
About 200 ft. higher in elevation there is another outlier of uncertain size, consisting of several seams of coal. This has a pitchy lustre, conchoidal fracture, blackish-brown colour, and contains numerous pieces of ambrite. Several of the seams are 2 ft. in thickness, and may be more. They are interstratified with carbonaceous shales, and lie on green sandy clays, which in turn lie on greywacke. The whole thickness of the beds is at least 100 ft., and may be much more, as the surface is masked by debris. The strike is north-east, and the dip north-west about 35°. It was just below this occurrence that the fragment of rock was found showing the sculpture of Monotis. The greywacke here strikes north-west.
These two patches are evidently the remnants of a much larger deposit which filled a considerable part of the cirque, the great size of which is evidently due to the fact that it was an area of easily eroded beds. The remnant is a very small one, and is rapidly disappearing. This observation is confirmed by the experience of Mr. Pringle, who accompanied us on our visit to the spot and stated that since he last saw it, some twenty years ago, the floor of the basin had completely changed and a great deal of the beds containing coal had disappeared. In the great snow winter of 1895 he had packed down half a ton of this coal for use at the Lilybank Station when supplies were short owing to the break in communication, and he said that it burnt excellently. If it were not in such a remote locality no doubt the deposit would have been used up long ago.
On both sides of the Macaulay between this and the lake are extensive deposits of brownish gravels antedating the glaciation. The pebbles are chiefly greywacke, but quartz is also an occasional constituent, although no quartz-bearing rocks are now found in the locality. These are evidently remnants of a much more widely extended sheet which has been swept away by glaciation.
In none of these occurrences of Tertiary sediments were any marine fossils found which might definitely prove that the beds themselves were of marine origin. They resemble very closely the deposits described by McKay (1882, p. 62) as occurring in the lower part of the Mackenzie country near Lake Ohau and in the Wharekuri basin, and classified by him as “Pareora,” or of Lower Miocene age. As far as the deposits at Wharekuri are concerned, considerable doubt has been thrown on McKay's account by both Park (1905, p. 499) and Marshall (1915, p. 380)—which is unfortunate, seeing that the Wharekuri basin is in the same river-valley as the Mackenzie basin, and the explanation of the origin of one might support that of the other. However, the deposits laid down in the basins of Central Otago, as described by Hutton (1875, p. 64) and Park (1906, pp. 15–19, and 1908, pp. 31–33), are so similar that a common origin is suggested. Hutton (loc. cit., p. 64) notes the similarity of the Otago deposits to those at Lake Ohau, and thus incidentally confirms the resemblance of the Tekapo beds to those of Central Otago. He classifies the latter as of Pliocene age.
There is thus a possibility that the beds occurring in the Tekapo district are of Pliocene age, though it is possible that the age of the Otago lacustrine (so called) beds has not been definitely determined up to the present, and that this opinion may have to be revised.

McKay was correct in suggesting (1884, p. 62) that considerable areas of his Pareora gravels and clays underlay the moraine which covered a considerable area of the plains, seeing that remnants of this deposit have now been located near their upper margin. Up to the present the valley of the Tasmai River has yielded no positive evidence of the existence of these beds, but the character of the slopes about Braemar is such that similar Tertiaries might be located beneath them.
There is thus direct evidence of the structural origin of the basin, apart from that suggested by its form; but the special point left to consider is the date at which it took on this form—that is, whether it antedates or postdates the time of deposition of the beds contained therein.
Hutton (1875, p. 64) was firmly convinced that the areas were basin-shaped before the deposits were laid down in them—that is, they were of pre-Pliocene origin—just as he maintained that the Canterbury intermounts were pre-Tertiary (1885, p. 91). In this he was followed by McKay (1884, pp. 76–81) and by Park (1905, p. 523; 1906, p. 9; 1908, pp. 17 et seq.), who restated his position in his Geology of New Zealand (1910, pp. 141–44). The latter evidently dates the formation of his block-mountain system of Otago and the Wharekuri basin to pre-Pliocene times, although he gives in numerous places instances of the beds concerned having been involved in faults and other deformations which may well have originated or have been attendant features of the formation of the basins.
On the other hand, Marshall (1915, pp. 380–81) has expressed the opinion that some of the basins, such as that at Wharekuri, were formed after the deposition of the Tertiary sediments, and that the landscape as it now exists has no resemblance whatsoever to the form of the surface when deposition was going on. This opinion has been strongly supported by Cotton (1916, pp. 316–17, and 1917, pp. 249 et seq.), who points out that the evidence for the basins being filled with lacustrine sediments is extremely slight, and that they were subjected to deformational movements after deposition, and that the dominant surface-features result from the faulting-down of blocks covered with a non-resistant veneer of Tertiary sediments which were preserved in the low-lying basins resulting from this faulting, whereas on the higher elevations it was completely or almost completely removed by erosive agents. In this paper, too, he endorses the statement that the upper course of the Waitaki River occupies a broad tectonic depression, and apparently accepts Kitson and Thiele's explanation of its origin, although this conflicts somewhat with his explanation of the origin of the basins of Central Otago.
The most important piece of geological evidence, apart from the physio-graphical, is that furnished by the character of the deposits themselves. There is a widespread absence of coarse sediments in the basal beds of the basin—sediments suggesting a mature topography and the absence of high land in the vicinity of the area of deposit; and if this contention is correct the landscape must have been entirely different from what it is now. It is inconceivable that sediments could have been laid down in basin-shaped hollows as at present existing without, in some parts of the area, coarse conglomerates forming an important element in the lower members of the series. Again, the presence of numerous quartz pebbles in conglomerates like those in the Macaulay Valley, evidently strangers to the district, cannot be easily explained unless the drainage directions were considerably different at the time of deposition from what they are at present. These geological features are not explained on the hypothesis that the “lake-basins” were formed before they were loaded up with sediments.

Again, the height at which these sediments occur in the Tekapo region is most striking. In Coal River they are 3,500 ft. above sea-level, and in Stony Creek 4,200 ft.—that is, 2,700 ft. above the floor of the lake. These deposits, especially the latter, could not have been deposited were the form of the Mackenzie basin at all like that at present existing. If the basin had been filled up to this level it would imply the removal of an enormous amount of material by glacier erosion subsequent to deposition, and this amount is too great to have been removed without leaving more than two slight traces of its former presence in the Tekapo area, even if we grant that glaciers have great powers of erosion. Some remnants other than those would be present, tucked away in some sheltered corner of the mountains out of the line of action of the ice-flood. If warping be called in to modify the form of the basin this argument falls to the ground. It is remarkable, however, that the remnants occur in a region where the mountains are highest.
If due regard be paid to the character of the deposits it will be evident that the Mackenzie country looks rather to Otago for its nearest relatives, though similar areas occur farther north in Canterbury. In these, limestones are a dominant geological feature; whereas in Otago they are almost absent, the occurrence of patches like that at Bob's Cove, on Lake Wakatipu, being quite exceptional. The occasional occurrence of marine shells, however, shows that the sea extended over the area. The presence of conglomerates at the close of the cycle of deposition indicates that fairly high land was in existence at that time; and, as similar gravels are found closing the Tertiary sequence over a great extent of country to the east (e.g., the Kowai* series of North Canterbury) and to the west of the Alps, as described in various bulletins of the Geological Survey, it is reasonable to think that the movements which resulted in the final formation of the Alps commenced towards the close of the Pliocene period and continued into the Pleistocene, and therefore that the intermounts date from that time. The final form of the landscape resulted largely from the influence of glaciation on the structural features then formed.
Little evidence of the direction of the axes of deformation is afforded by the Tekapo district. There is nothing to support the contention of Edward Dobson that the orientation of the valley of the Godley was initially determined by tectonic movements, although I came across nothing against it. The axis of the valley, however, seems to correspond with the general strike of the greywackes and associated rocks.
The latest observed deformational movements that the district experienced are on north-east and south-west lines. The strike of the coalbeds in Stony Creek, and also the fault-line which bounds the occurrence in Coal River, have this direction. From the limited and unsatisfactory nature of the exposures in the latter locality the general strike of the beds cannot be accurately determined, but the even and regular slope of the northwest side of the Richmond Range suggests that it corresponds with some fault-line; and, further, if such a line be granted to exist, and its direction
[Footnote] * Note.—I have retained the spelling for this term in the form as applied originally by myself to the series developed in North Canterbury, although Dr. J. A. Thomson has criticized it and replaced it by another spelling in his paper on the “Geology of the Middle Waipara and Weka Pass District” (Trans. N.Z. Inst., vol. 52, p. 334, 1920). The spelling used by me is that originally used by Haast, and is also that in official use for the past thirty years not only for the river, but for the district, now merged into a county. It is that which appears on all recent maps issued by the Survey Department. Further justification is, I think, unnecessary.

be followed into the Rangitata Valley, it is found that the steep tent-sided face of the Ben Macleod Range, which forms the southern boundary of the Forest Creek valley, is in actual alignment with it. This striking surface-feature cannot be accounted for as the result of stream or glacier erosion, but if faulting be granted it would also explain the subdued character of the surface which lies to the south of the Mesopotamia homestead, this having been Iowered as a result of the earth-movement, and it would also help to account for the form of the Rangitata intermount. Further, if the line of the north-west face of the Richmond Range be continued to the south-west across Lake Tekapo it will pass along the north flank of the isolated Mount John, and bound the considerable area of flat country which lies between that elevation and the Mistake Range, which may also owe its form to having been faulted down. This is a pure speculation, but the peculiar position of Mount John requires some explanation, and it seems impossible to account for it as the remnant of a spur or extension of the Mistake Range, with the connecting-ridge removed entirely by normal glacial erosion.
In concluding, I should like to express my indebtedness to Mr. James Pringle, of Richmond Station, who not only gave valuable information with regard to the district, but also kindly provided means of transport so that the most was made of the time at my disposal.
References.
Cotton, C. A., 1916. Structure and Late Geological History of New Zealand, Geol. May., dec. vi, vol. 3, pp. 243 and 314.
—– 1917. Block Mountains in New Zealand, Am. Jour. Sci., vol. 44, p. 249.
—– 1919. Rough Ridge, Otago, and its Splintered Fault-scarp, Trans. N.Z. Inst., vol. 51, p. 282.
Hutton, F. W., 1875. Geology of Otago, p. 64.
—– 1884. Origin of the Fauna and Flora of New Zealand, Ann. Mag. Nat. Hist., ser. 5, vol. 13, p. 425.
—– 1885. Ibid., vol. 15, p. 77.
Kitson, A. E., and Thiele, E. O., 1910. The Geography of the Upper Waitaki Basin, New Zealand, Geog. Jour., vol. 36, p. 431.
McKay, A., 1882. Geology of the Waitaki Valley and Parts of Vincent and Lake Counties, Rep. Geol. Explor. during 1881, p. 56.
—– 1884. On the Origin of the Old Lake Basins of Central Otago, Rep. Geol. Explor during 1883–84, p. 76.
—– 1897. Report on the Older Auriferous Drifts of Central Otago, 2nd ed.
Marshall, P., 1915. Cainozoic Fossils from Oamaru, Trans. N.Z. Inst., vol. 47, p. 337.
Park, J., 1906. Marine Tertiaries of Otago and Canterbury, Trans. N.Z. Inst., vol. 38, p. 489.
—– 1906. Geology of the Area covered by the Alexandra Sheet, Central Otago Division, N.Z. Geol. Surv. Bull. No. 2.
—– 1908. Geology of the Cromwell Subdivision, Western Otago, N.Z. Geol. Surv Bull. No. 5.
—– 1909. Geology of the Queenstown Subdivision, Western Otago, N.Z. Geol. Surv. Bull. No. 7.
—– 1910. Geology of New Zealand.
Speight, R., 1915. The Intermontane Basins of Canterbury, Trans. N.Z. Inst., vol. 47, p. 336.

Art. V.—The Modification of Spur-ends by Glaciation.
[Read before the Philosophical Institute of Canterbury, 6th October, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
Plates VII–XI.
The subject of the changes which glaciers exert on the form of stream-valleys is such an interesting one that special aspects are worthy of detailed consideration. It has not, however, been fully considered so far as this country is concerned, although Andrews in his classic paper on the glaciation of south-western New Zealand (1905) has drawn attention to certain forms, such as the total truncation of spurs, and the development of sitting-lion and titan-beehive shapes, as well as the formation of a double slope on the valley-sides and especially on the spur-ends. The present author has pointed out certain other features (1907 and 1911), but observations made during the past few years in the alpine region of the South Island of New Zealand have suggested that still other forms exist. The faceting of spur-ends as a general result of the overdeepening of glaciated valleys and the formation of tributary hanging valleys has been dealt with in various places by W M. Davis, G. K. Gilbert, de Martonne, and others; but apart from this, judging by the literature at my disposal, little has been written. Davis has, however, insisted that the detached knobs on the floors of valleys, either separated from or in close proximity to the valley-walls, are remnants of a pre-glacial land-surface which have escaped destruction. He says (1900, p. 274), “On entering the glaciated valley of the Rhue it is found that the regularly descending spurs of the non-glaciated valleys are represented by irregular knobs and mounds, scoured on their up-stream side and plucked on the down-stream side; and that the cliffs formed where the spurs are cut off are sometimes fully as strong as those which stand on the opposite side of the valley. The spurs generally remain in sufficient strength to require the river to follow its pre-glacial serpentine course around them, but they are sometimes so far destroyed as to allow the river to take a shorter course through what was once the neck of a spur.” Again, on page 276 he says, “It is seen that just before the complete obliteration of the spurs some of the remnant knobs may be isolated from the uplands whence these pre-glacial spurs descended. It is out of the question to regard the ruggedness of such knobs as an indication of small change from their pre-glacial form, as has been done by some observers. The ruggedness is really an indication of the manner in which a glacier reduces a larger mass to smaller dimensions by plucking on the down-stream side as well as by scouring on the up-stream side. It is possible that knobs in other glaciated valleys than that of the Rhue may be of this origin; they should then be regarded not as standing almost unchanged and testifying to the incapacity of glacial erosion, but as surviving remnants of much larger masses, standing, like monadnocks above a peneplain, as monuments of the departed greater forms.”

The glaciated knobs of the Central Plateau of France that he notes later on hardly come into this category, but on page 288 he refers to rocky knobs seen in abundance about Ambleside and along the ridge separating Thirlmere from St. John's Vale, in the County of Cumberland, in England. In this paper he everywhere emphasizes the potency of glacier erosion, especially in valleys.
In a subsequent paper (1905, pp. 4–5) he again refers to knobs: “The knobs and ledges may be taken to be so-many unfinished pieces of work, which would have been more completely scoured away had the glacial action lasted longer.” This point he again emphasized in a paper on “American Studies on Glacial Erosion” (1910, p. 423), and refers to it slightly in the discussion on his account of the glacial features of North Wales (1909), and also in an answer to a question on glacial knobs addressed to him by M. Allorge.
This is a summary of Professor Davis's position as far as I can see from the literature at my disposal. It will be noted, however, that nowhere in the papers I have cited has he illustrated his point by showing the various stages by which a spur actually develops into a field of knobs; and this is somewhat surprising, as the method would be one entirely in keeping with the way in which he so frequently presents a physiographic problem.
I have examined other authorities, such as Hobbs and de Martonne, and find that faceting is everywhere recognized, but no other forms are noted. In the report of the Harriman Expedition to Alaska, G. K Gilbert deals exhaustively with the origin of hanging valleys and faceted spurs, but says little or nothing of any other of the various stages of modification However, I have examined the maps and illustrations and can see little evidence of intermediate forms, with the possible exception in the case of Nunatak Glacier (p. 59, and map), where the Nunatak appears to be a detached knob or end of a reduced spur.
Since there is this absence of statements concerning intermediate forms, I have attempted to supply some evidence as to their occurrence which I have come across during years of intimate acquaintance with the alpine region of the South Island of New Zealand. Incidentally this will be found to support Davis's contention that fields of knobs in the floor of a glaciated valley represent the remnants of spur-ends.
The main effect of ice-action on valley-spurs is due to abrasion, although no doubt plucking is very important at times, and especially in its more mature stages, when the spur-ends have become faceted At this stage, too, the excavating-power of a glacier has a dominating influence on the resulting landscape-form. But the depth of the ice, its velocity, and the time to which the surface has been subject to its action all exert important influences; and, further, the direction in which the tributary valley meets the main valley also controls to some extent in its initial stages the result of ice-action on the spur-ends.
As its dominating influences are those of thickness, velocity, and time, the modification of valleys, and therefore of the spurs running into them, will be different in different parts of the valley, being more pronounced in the upper portions, owing to the fact that these agencies are there at their maximum. Those parts of the valley where the ice is thickest, its velocity greatest, are just those parts which have experienced its action for longest time, and therefore modifications will be carried further than in the lower reaches. It will follow also that the character of the pre-glacial topography will be most easily arrived at by a study at the fringe of the glaciated district,

Fig. 1.—Lake Manapouri, looking west. Island in foreground with profile similar to those in Plate VII, figs. 1 and 2, but more rounded. A still more rounded form in the background farther west, it having been more exposed to erosion.
Fig. 2.—Semi-detached knob, Thompson Sound.

where the action has not been intense, owing to the thinness of the ice and the shortness of the period during which the area has been covered. Also, there will be a progression of phenomena, varying in intensity on moving from the outskirts of the glaciated area; and phenomena characterizing the areas where glaciation has been intense, inexplicable in themselves, may be elucidated from the intervening regions where glaciation has been intermediate in its intensity.
The region of the South Island whence most of the instances to be mentioned later are drawn had reached a submature stage in the cycle of erosion before the incidence of the glaciation. Valleys had been cut in an elevated area, and a well-developed stream-system had been established with long spurs trailing down into the main valleys; but the district was one of alpine character, with peaks approaching in elevation, if not exceeding, the present European Alps.
A most interesting case illustrating the nature of the slight modification to which spurs may be subjected on the outskirts of a glaciated area is furnished by Lake Manapouri. The chief complex of spurs entering the basin occupied by the lake reaches down from the north, the spurs running in a north-and-south direction, whereas the direction of the chief ice-stream was from the west, and in its passage eastward it cut across the long trailing ridges of the pre-glacial land-surface. Erosion was most marked in the western reaches of the lake, where the ice was thickest and had acted for a longer time, so that a great trough or hollow was formed, with precipitous sides carried far down below the present surface of the lake (depth 1,458 ft.). Not all of this is to be credited to excavation by glacier-action, but some portion to the damming-back of the water by the morainic bar of the combined Te Anau and Manapouri glaciers. While the ice has profoundly modified the western portion of the lake and removed the spurs of the pre-glacial valley-system, the change in the eastern spurs has been slight, merely cutting them into a series of notches placed one below the other down the backbone of the ridge, all with the same characteristic profile, and continued down to lake-level, where exactly the same landscape-form is reproduced in the islands that dot the lake. (See Plate VII, figs. 1 and 2.) These notches form a kind of stairway with the treads inclined backward so that the level of the tread is lower at the foot of the riser than on the edge of the tread (cf. glacial stairway in a valley). The spur has thus been little modified, so that its original form can be restored. The slight modification suggests that the ice, though deep, as is evidenced by the height up the spur to which the series of notches reaches, can have exerted its action for a comparatively short time or it would have produced a profounder impression. Although signs of ice-action are found some twenty miles to the east of these spurs, the period of advance must have been quite short, or the spurs would have been more profoundly modified. Traces of this peculiar landscape-form are to be found on all the spurs to the eastern end of Manapouri where they were likely to be exposed to the full force of the ice-flood, so that it can hardly have been an accidental feature. Still farther eastward the spurs are unmodified. In Plate VIII, fig. 1, which is a view of the lake looking west, there are also signs of the same form, with a more developed knob in the background.
The form of the modified spurs suggests another point. Judging from the shape of the islands which lie off the ends of the spurs, it is clear that before the ice-advance the spurs continued down below the present level of the lake. It therefore negatives the idea that the hollow in which the lake

now lies has been entirely due to glacial erosion. In my opinion, the hollow is primarily tectonic, but the surface so formed has been modified by stream-action, succeeded by glaciation, and that now a new cycle of stream erosion has commenced.
The form of the notches cut in these spurs is also characteristic of ice erosion, since glaciers always appear to exert their maximum erosive effect at the base of the valley-sides or shelves along which they move. Thus the notches have the backward slope which results from this mode of action. When this becomes more pronounced and ice-action has been more prolonged, the outstanding portions of the ridge tend to become rounded eminences. If a stairway was attacked further the notches would become a string of knobs, gradually getting higher as the spur is followed upwards. This stage of development is seen in the Waimakariri Valley to the west of the Cass River, where Mount Horrible and Mount Misery owe their rounded form to the great Waimakariri Glacier crossing a spur which runs parallel with the present Cass River and enters the main valley nearly at right angles. (Plate IX.)
The formation of a well-developed series of notches generally occurs where the spur has great length; but if it is shorter in the pre-glacial stage only one or two notches may be cut, and the resulting form becomes a semidetached knob or titan beehive noted by Andrews in the Sounds region. (Plate VIII, fig. 2.) This form is typically developed in the Upper Rakaia Valley at Mein's Knob and Jim's Knob, the latter being formed by the Ramsay Glacier passing over the terminal spur of the Butler Range. (Plate X, fig. 1.) Numerous illustrations in all stages of development can be seen in the Upper Waimakariri Valley, especially where the action of the main glacier has not been interfered with by the weight of the ice issuing from a tributary comparable in size to the main stream. When the tributary becomes large the modification of the spur is attributable chiefly to its action, and not to the erosion of the main stream.
From the slight difference in the form of the notches in the higher part of the series as compared with those at floor-level it is evident that all the notches were cut during one period of ice-advance. Had there been more than one ice-flood, reaching various levels, there would have been some difference in the form of the higher members of the series from that of the lower. As the lower members would have experienced more than one ice-flood, their stage of erosion would have been more mature. Also, if the ice had not reached so high in the later floods as in the earlier the exposed notches or knobs at higher levels would show more the effects of subaerial erosion, by rain, frost, &c. For example, if the first flood were the highest, then while the lower levels were being subsequently glaciated the higher and exposed levels would have been differentially modified by subaerial erosion, and glacial erosion of the lower slopes would have been carried to a more mature stage. If the last ice-flood had been the highest, the modification of the higher levels would have been different in that the glacial surface would have been juvenile, while the lower would have been mature. If an intermediate flood had been the highest, a differential modification partaking of both characters would have occurred, depending on the relative importance of the two phases. But the only difference—and that is a very slight one—is that which might have been expected in the lower parts of a glacier, where, under the influence of greater weight of ice, abrasion, plucking, sapping, and other glacial agencies are more intense.
The knobs of the Cass Range show very markedly the modifying effect of frost erosion, as their plant covering is of the scantiest—in marked contrast

to the forest-covered slopes near Manapouri; but it is noteworthy that erosion has reached a similar stage in each individual of the series of knobs, suggesting that they were all formed by the same ice-flood, as is the case of those near Manapouri.
The tact that the series of notches in these spurs has been cut all at the same time suggests that the shelves existing in valleys of the European Alps may, in some cases, have been cut during one period of ice-advance. These are referred to by de Martonne in his Géographie Physique (p. 641). After describing the shoulders which are so characteristic of these valleys, and the location of villages on them, he says, “Les replats multiples indiquent que l'érosion des vallées alpines est le résultat d'une série de phases d'érosion glaciaire et d'érosion fluviale alternantes, produisant un enfoncement progressif du thalweg et un encaissement de plus en plus grand de la vallée, malgré les efforts faits par le glacier pour reculer le pied du versant par sapement à chaque période glaciaire !” Although it is dangerous to express an opinion without having seen the locality, it seems possible that these flats and shoulders may—in some cases, at all events—have been formed at one glacial effort, like those at Manapouri.
An important factor which affects the resulting form of the spur-remnant is the angle at which the pre-glacial valley of the tributary meets that of the primary. It will be most convenient to take the simple case when they meet at right angles or nearly so. Good illustrations of this case are furnished by the Bealey and Hawdon Valleys at their junction with that of the Waimakariri. The two tributaries come in from the north, whereas the main stream runs from west to east. The tributary valleys are subequal in size, and the size of the glaciers issuing from them at the height of the glaciation, judging from the present cross-section of the valleys, would be about one-fourth of that of the main stream. As a result of the greater weight of the ice in the main valley, the tributaries were crowded over the shoulder of the spur on the down-stream side of the tributary, with the result that they have both a flattish shelf about 100 ft. above the present floor of the valley and about 200 yards in length, formed by the cutting-down of the end of the spur, so that it terminated in a kind of platform analogous to the wide shore-platforms sometimes seen off a point on a coast-line composed of moderately soft rocks. (See Plate X, fig. 2.) The two spur-ends are so similar in position, shape, and extent that they might easily be mistaken, and photographs taken from the opposite bank of the Waimakariri are almost interchangeable. The similarity in form is no doubt to be attributed to similarity in the conditions under which the spur-ends were reduced by the glaciers as erosive agents.
If erosion proceeds further the shelf is cut down near its proximal end, and the beehive form again results, but it is then flatter than that resulting from the passage of the main stream at right angles over a trailing spur.
If the tributary meets the principal valley at an angle greater than a right angle, as in the case of Harrison Arm and Milford Sound, or the Sinbad Valley with Milford Sound, then the form becomes accentuated. The formation, not of a shelf, but of the couchant-lion shape, takes place, but ultimately this must develop into the beehive form. This form is, of course, subject to profound abrasion, and is liable to be reduced by attack from both sides and also on top, so that it ultimately becomes a mere roche moutonnée, standing in the floor of a glacial trough, and apparently without genetic connection with the valley-sides. In most cases, however, such isolated rocks were once connected directly with the valley-sides, the

connecting ridges having been completely removed by glacial abrasion. All the different stages in the formation of such isolated rocks from spur-ends can be seen in the valleys of the Southern Alps.
Worthy of special mention are the detached hills which lie in the angle between the Poulter and Esk Rivers near their junction with the Waimakariri. They are the remnants of the spur which once came down between the two former rivers, and whose end was dismembered by the large glaciers which issued from the Poulter Valley and Boundary Creek Valley, crossing it near its termination.
Spurs are eroded on the up-stream side in a somewhat different way. There is no overriding except in the case of the main stream entering a distributory valley, as in the case of the Rakaia branching off into the Lake Heron Valley, or when a glacier crosses the mouth of a tributary valley which is bare of ice. When, however, both are full of ice the end of the spur is modified by an action which is analogous to the whirlpool that forms when two rivers join, as a result of which the end of the spur is ground back below the surface of the glacier, so that it presents a steep face at the angle between the streams.
When the tributary meets the main valley at an angle less than a right angle the spur-ends are cut back, though with less overriding of the end than when the angle is greater. Narrow shelves, somewhat resembling terraces, are the common resultant form. Excellent illustrations of these can be seen at the junction of the Macaulay River with the Godley, and in the angle between the Potts and the Rangitata.
When valleys are subparallel, then there can be little or no truncation of the dividing ridges, but these are dismembered and cut into lengths as the result of lateral corrasion, chiefly by means of small tributary glaciers of the corrie type whose heads ultimately meet and lower the divide. Thus we get the elongated rocky hills which are so frequent in our ice-enlarged intermontane basins, which if submerged would produce elongated islands in parallel or linear arrangement, such as those which add to the scenie beauty of the West Coast Sounds, notably Dusky and Doubtful Sounds.
In the figures given by Davis illustrating partially destroyed spurs, fields of knobs appear to be a common feature. I have noticed occurrences similar to these in places where spurs have been partially destroyed—e.g., in the valley of the Harper River to the north-east of Lake Coleridge; but the most characteristic occurrence is in the valley of the Rangitata at the place called by the somewhat striking name of the “Jumped-up Downs.” (Plate XI, figs. 1 and 2.) This is evidently the residual of a destroyed spur, and its irregular appearance is well described by the name given by the early settlers. Right out in the floor of the Rangitata Valley is an isolated rocky mound in a line with the hummocky area; this is evidently the remnant of a spur which reached a considerable distance into the wide basin now occupied by the river.
The surface of these hummocks is characteristically worn into smaller roches moutonnées, often well striated, forming rounded oval masses with dimple-like hollows in between. When the general surface is flat, as is frequently the case when shelves are formed from the terminations of spurs, shallow rock-bound pools are formed containing the characteristic bog-vegetation of these regions, which passes into peaty masses. Excellent examples of these can be seen on the platforms at the junction of the Bealey River with the Waimakariri, and on the reduced spur-ends farther up-stream opposite the mouth of the Crow River.

References.
Andrews, C. E., 1905. Some Interesting Facts concerning the Glaciation of Southwestern New Zealand, Rep. Austr. Assoc. Adv. Sci., vol. 10, pp. 189–205.
Davis, W. M., 1900. Glacial Erosion in France, Switzerland, and Norway, Proc. Bost. Soc. Nat. Hist., vol. 29, No. 14, pp. 273–322.
—– 1905. Glaciation of the Sawatch Range, Colorado, Bull. Mus. Comp. Zool., vol. 49, Geol. Ser., vol. 8, No. 1, pp. 1–11.
—– 1909. Glacial Erosion in North Wales, Quart. Jour. Geol. Soc., vol. 65, pp. 281–350.
—– 1912. American Studies on Glacial Erosion, Compte Rendu du XIme Congres Géologique International, vol. 11, pp. 419–27.
de Martonne, E., 1913. Traité de Géographie Physique.
Gilbert, G. K., 1904. Alaska, vol. 111, Glaciers and Glaciation.
Speight, R., 1908. Notes on some of the New Zealand Glaciers in the District of Canterbury, Rep. Austr. Assoc. Adv. Sci., vol. 11, pp. 285–87.
—– 1911. The Mount Arrowsmith District, Part I, Physiography, Trans. N.Z. Inst., vol. 43, pp. 317–42.
Art. VI.—Recent Changes in the Terminal Face of the Franz Josef Glacier.
[Read before the Philosophical Institute of Canterbury, 6th October, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
Plates XII, XIII.
In 1909 Dr. J. Mackintosh Bell, then Director of the New Zealand Geological Survey, placed a number of pegs along the face of the Franz Josef Glacier in order to enable its subsequent advance and retreat to be definitely determined. Their position, and other particulars about the glacier, were recorded in a publication issued by the Survey in 1910, entitled “A Geographical Report on the Franz Josef Glacier.” Since then Mr. A. Graham, who is guide at the glacier and takes the keenest interest in its varying moods, has from time to time recorded the movements of the face, and a summary of his observations was published by the present author in 1914 under the title, “Recent Changes in the Position of the Terminal Face of the Franz Josef Glacier.”* Since the appearance of this record the glacier has rapidly retreated, as will be clear from the observations detailed below; but it is approaching a stage when an advance may be expected, and it is therefore most important that its present features should be placed on record as definitely as possible in order to afford a sound basis for future comparisons. Mr. Graham has most kindly assisted with observations, and a recent visit of the author to the locality (February, 1921) enabled these observations to be confirmed and brought up to date, Mr. Graham rendering most willing and valuable assistance. It is somewhat difficult, however, to get precise records at present, since ponds of water of varied width up to some 100 to 120 metres lie in front of the greater part of the face and prevent close approach to it except by means of a boat, which was not available; and, further,
[Footnote] * Trans. N.Z. Inst., vol. 47, pp. 353–54, 1915.

these ponds cover extensive areas of submerged ice lying in position, so that the precise location of the end of the ice is almost impossible. Nevertheless, the observations conclusively prove that there has been a marked retreat of the ice since 1914, and still more since 1909. In this account reference will be made to each of the pegs in turn, and the characteristics of the face in its vicinity recorded as accurately as possible; and for the purposes of ready comparison all measurements will be recorded in metres. As the general trend of the front of the glacier is approximately
east and west, the line in which measurements were made from the pegs was north and south, unless special reasons occurred for deviating from this direction. It should also be mentioned at this stage that the principal part of the Waiho River now runs from the eastern side of the glacier, and that lying in front of its western edge is a complex of roches moutonnées, evidently the remains of a spur of the pre-glacial valley, destroyed as described in a paper published elsewhere in this volume (see p. 47). The solid barrier presented by these rocks has no doubt caused the stream to discharge near the eastern side where the lip of the obstruction is lower.

Fig. 1.—Ice-front viewed from Park Rock, looking south-west, showing pond with ice continuing down below water-level. Freshly exposed roche moutonnée on light.
Fig. 2.—General view of glacier, looking south from Park Rock, showing overthrust upper layers in foreground and advancing pulse in background; Roberts Point on the extreme left top corner.

Fig. 1.—View looking east from Park Rock, showing part of pond fronting ice in the foreground, with collapsed glacier ice to the right. Peg No. 7 is situated on the rock-edge to the left of the picture, at a height of 200 ft. above the river. The Waiho River runs along the foot of the slope over ground from which the ice has retired since 1909.
Fig. 2.—View from peg No. 7, looking south, showing source of the Waiho River, and slightly advancing ice to the left; advancing pulse in the background.

The circumstances of the ice in the front of each peg will now be taken in turn, the chief features and points of interest being recorded on the map.
Peg No. 1.—This was placed on solid rock on the western side of the valley, but it is now covered with moraine, and its precise location is impossible without detailed survey. In 1909 the ice was 1 metre from the peg; it is now 279 metres distant, the measurement being made approximately parallel with the valley-wall to the point where the ice meets it. The face is here quite low, but immediately to the east the pool of water fronting the glacier commences, and the face is higher, sometimes overhanging; farther east the face again becomes low. The pool is about 60 metres broad on its western margin. The rapid retreat of this part of the face was mentioned in the records issued in 1914, as Mr. Graham then noted that the river had cut a wide gap between the ice and the western wall of the valley. The movement has apparently been much accelerated since the last observation.
Peg No. 2.—It was not found possible to determine the distance of the face from this peg in a satisfactory manner—first, on account of the pool, about 50 metres wide, fronting the glacier, and, secondly, because the ice in its retreat has exposed a large rock about 30 metres in height above the level of the water. The pool now washes the southern face of this rock. This rock was not exposed in 1914, so that its appearance and situation give some idea of the great distance the ice has retreated and the change in the condition of the face. (See Plate XII, fig. 1.)
Peg No. 3.—This is situated on Harper Rock. When originally placed the peg was at the ice-face. In 1912 it was 15 metres away, in 1914 it was 37 metres, and now it is 160 metres distant. The ice is fronted here by water 50 metres wide. (See Plate XII, fig. 1.)
The trend of the ice-front along the stretch just dealt with is slightly east of north, and running in a line with Strauchon Rock. Between Harper Rock and Park Rock another smaller rock has been exposed, and all three present a face towards the glacier not suggested by the map attached to Bell's account. The southern faces of all three are in approximate alignment, the direction running E. 30° S., and being determined by the dominant joint-planes traversing the schist of which the rocks are entirely composed. They all present a steep face to the south, and do not exhibit the effects of glacier erosion to a marked degree, there being a tendency to split both along the foliation-planes and also the joint-planes, so that any glacial smoothing originally existing has disappeared as the slabs have flaked off.
A low tongue of ice runs from the glacier into the pool (Plate XII, fig. 1), between the large new exposed rock in front of peg No. 2 and Park Rock, but ice occurs in position under the water of the pool, so that it extends farther forward at this part of the face than elsewhere. The end of this tongue is almost due west of peg No. 4, on Park Rock. The edge of the pool reaches the south-west side of the rock, but the pool narrows to a point, and there is a small stream issuing from it immediately to the west of Park Rock. The southern face of Park Rock is reached by the ice, but the rock has a much greater extent to the south-south-east and south-west than is suggested by Bell's map.
Peg No. 4.—This is on Park Rock. When originally placed it was surrounded by ice except to the northward. In 1912 the ice was 23 metres away, in 1914 it was 58 metres, whereas it is now 100 metres distant. The face is also low, but the upper layers show signs of being pushed over differentially. (See Plate XII, fig. 2.)

Opposite Strauchon and Barron Rocks there is a good expanse of water, and the edge of the ice reaching down into it is low and irregular, presenting embayments such as occur on a drowned coast-line, and no doubt the ice extends forward below water-level. For these reasons it was not considered advisable to measure the distance of the face from pegs Nos. 5 and 6, but the retreat from the line of the ice-front indicated on Bell's map certainly exceeds 160 metres, since the farthest exposed ice is at present almost due east of peg No. 4, on Park Rock. The whole of this portion of the face affords evidence of collapse, and the upper layers of ice show shear-planes and have evidently been pushed over the lower layers, an effect certainly due to differential movements; but whether this is to be attributed to the collapse of the glacier or to a definite thrust forward of the upper layers of ice is quite uncertain. This phenomenon seems to be more pronounced as Park Rock is approached. (See Plate XIII, fig. 1.)
By far the greatest volume of water issuing from the glacier runs out, of the north-east side of the pool which fronts the ice east of Park Rock, but a very considerable stream issues from close to the eastern side of the glacier and runs along between the ice and the wall of the valley for over 400 metres. In this part of the face the retreat has been most marked of all, as the measurements clearly show.
Peg No. 7 was initially placed 2 metres from the ice; by 1912 it was 14 metres away, by 1914 it was 24 metres, and now it is as much as 456 metres distant from the peg to where the ice abuts against the eastern valley-wall near river-level. The front is very high, over 20 metres in this section, and there is evidence of a small advance, since the ice is crowding over lichen-covered rock at the side. This advance may be of local character and therefore of little importance, but it may be symptomatic of a pronounced forward movement which is impending (See Plate XIII, fig. 2.)
It will be evident from the foregoing records that the minimum retreat of the face since 1909 has been 100 metres, and the maximum 456 metres, and after making all due allowance for the form of the face the average retreat of the front of the glacier is found to be approximately 180 metres.
As noted previously, there are evidences of approaching advance. A pulse indicating a marked rise in the ice is strongly developed about half a mile (800 metres) up the glacier, and the ice is pushing over the moss-covered glaciated rock-surfaces of the valley-walls at Roberts Point and Cape Defiance, still farther up. (Plate XIII, figs. 1, 2.) If the rate of movements of the glacier be that determined by Bell—viz., from 1 ft. to 2 ft. (0.3 to 0.6 metres) per day—this pulse should reach the terminal face in from three to five years. If the rate of movement is faster, as it probably is, the space of time will be correspondingly reduced, and it may be reduced still more as the oncoming wave affects the ice immediately in advance of it. A similar pulse is observed in the neighbouring Fox Glacier, and Mr. Graham intends to place a mark in a good position on the Chancellor Ridge near the glacier so that the rise of the ice-level may be correctly determined.
Mr. Graham has also made observations to arrive at the rate of flow. Selected morainic blocks lying on the surface of the ice below Roberts Point have shown an average movement of 3 ft. (1 metre approximately) per day during a period of 200 days, and it is likely that at the base of the first ice-fall the rate is much faster. Observations have been made since November, 1920, but the results are not yet available.

An interesting point to consider is the possibility of periodicity in advance and retreat. My first experience of the glacier was in the year 1905, when it was advancing. It was also advancing in 1909 when Bell made his observations, and was retreating in 1912. I cannot determine the precise year when this retreat commenced, but it had probably set in during 1910, and has continued since that date, so that it has been falling back for approximately eleven years. One cannot predict at present when this retreat will end, or what the total length of the cycle is likely to be.
There are one or two other points to which brief allusion may be made. First, the angle of the shear-planes near the present terminal face, especially those near the eastern front of the glacier, suggests that a great thickness of ice, probably to be measured in hundreds of feet, exists behind the rock bar which stretches from the western wall of the valley towards the present mouth of the. Waiho between Barron Rock and peg No. 7. If, therefore, the glacier should retreat farther, the lake along its face will probably increase in size, and it will furnish a suggestion of what usually happens as the ice retreats from a rock bar across a valley. Such conditions must have occurred in the Rakaia, Wilberforce, and Waimakariri Valleys when the ice commenced to retreat towards the heads of the valleys from the barrier near the plains in late Pleistocene times.
An examination of the rock-surface recently exposed does not suggest that glaciers have any marked power of erosion near their ends even when advancing, slight abrasion being all that was noted on the roches moutonnées recently exposed before the terminal face; but, of course, this does not negative their power to erode their beds where the ice is thicker.
The presence of an apparent wave of high ice might have been credited to the influence of an irregular bottom during a period of ice-decline, analogous to the effect of obstructions in the bed of a river, masked as they frequently are at high water, were there not definite proof that ice is actually rising relative to the rocks at the side. In any case, the thickness of the ice is very great even in times of lower level; all the same, there is some suggestion in the alternating stretches of ice-fall with more gently inclined surface, shown not only in this glacier but in the Fox as well, that if the ice were removed the valley-floor would exhibit in a perfect form the characteristic stairway developed in glaciated regions—as, for example, those in Deep Cove and other valleys at the heads of the sounds of the west coast of Otago.
In conclusion, I have to express my indebtedness to Mr. Graham for much valuable information and for ready help. He has promised to continue observations and to take photographs of the face from already-selected positions on Park Rock at the same time each year, so that changes in the character and position of the terminal face can be accurately recorded. It is important that they be taken during the same month of the year, so as to eliminate any error due to variation between the summer and winter heat.

Art. VII.—Notes on the Geology of the Patea District.
[Read before the Wellington Philosophical Society, 27th October, 1920; received by Editor, 10th December, 1920; issued separately, 27th June, 1921.]
Previous Investigations.
Mr. John Buchanan, in a paper read before the Wellington Philosophical Society in September, 1869 (2),* mentioned the blue clay of Patea, which he placed in the Wanganui beds, but expressed a doubt as to this being its right position. It might, he thought, belong to a somewhat older formation.
In January, 1884, Professor F. W. Hutton, accompanied by Mr. S. H. Drew, of Wanganui, spent a day in the neighbourhood of Patea. In a paper on the Wanganui system (3), he writes (p. 340),—
“On the sea-coast at Patea, south of the mouth of the river, blue clay with fossils passes up gradually into a blue micaceous sandy clay, apparently unfossiliferous. Upon this lies about 12 ft. of yellow sand; then cemented gravel 4 ft. thick, followed by grey sands, and then red and yellow sands. The upper beds form the cliff, and, not being very accessible, I did not examine them closely, but I could find no fossils in the tumbled blocks. The sequence is remarkably like that at Wanganui. The yellow sand is distinctly separated from the blue micaceous clay upon which it rests, but without any appearance of unconformity. The number of species obtained from the blue clay is twenty-six, of which 77 per cent. are Recent. Three species of Pareora shells, not known from any other part of the Wanganui system, have been found in the blue clay at Patea. They are Oliva neozelanica, Struthiolaria cingulata, and a species of Cucullaea (fragments).”
In 1886 Professor James Park, at that time a member of the Geological Survey staff, examined the coast-line from Kai-iwi to Patea (see 4, pp. 26, 55, 56, 57, &c.). He states that there are evidences of the existence of a submerged forest between Wanganui and Patea, and describes a “drift formation” which “extends as a maritime belt from the Ruahine Range to the foot of Mount Egmont.” This formation is well exposed in the cliffs between Wanganui and Patea (4, p. 59; see also 7, p. 414). From the blue clays exposed near the mouth of the Patea River Park obtained the following fossils: Malletia australis Q. & G. (listed as Solenella australis Zittel), Atrina zelandica (Gray), Nucula nitidula A. Adams, Struthiolaria cingulata Zittel, and fish-scales.
[Footnote] * This and other numbers enclosed in brackets refer to list of literature at end of paper.

Mr. W. Gibson, of the Geological Survey, visited Patea in September, 1914, with the object of reporting on the ironsand deposits of the district. His report (6) describes only the beach and dune-sands.
In 1917 Dr. J. A. Thomson published a paper (7) on the “Hawera Series,” in which he makes reference to the geology of Patea. The Hawera series, he states, is well exposed in the cliffs between Wanganui and Hawera. The mudstone or claystone (papa) forming the lower part of the sea-cliff at Hawera is “probably about the same age as the Patea blue clays, which are placed by Park below the Ostrea ingens bed of Waitotara. It is certainly older than Castlecliffian, and is probably Waitotaran.”
The observations lately published by Marshall and Murdoch (10) on the fossils collected by them at Wanganui, Kai-iwi, Nukumaru, Waipipi, &c., have an important bearing on the age of the Patea blue clays.
Last October the writer paid a brief visit to Patea, and made observations which are embodied in the following pages.
Physiographic Features.
The district surrounding Patea forms part of that decidedly complex feature generally termed the Wanganui coastal plain, which, viewed broadly, may be said to extend along the south-west coast of the North Island from Paraparaumu in south Wellington to Opunake in Taranaki, and inland to the slopes of Mount Ruapehu, while if Mount Egmont and the adjoining volcanic ranges were removed the whole of Taranaki might be included in the plain. The inland portion of the area just defined is for the most part maturely dissected, and exhibits numerous irregular ridges of approximately equal height in adjoining localities, separated by deep, narrow valleys. The coastal belt, in marked contrast to the inland region, as a rule has a nearly flat surface, sloping uniformly and gently towards the sea, where it is usually, at least from Wanganui north-westwards, ended by dune-capped cliffs of considerable height. Inland of Hawera there are one or two well-marked marine terraces (“raised beaches”).
The principal streams north of the Manawatu River have cut deep, rather narrow, steep-sided valleys in the soft rocks of the coastal area, one result of which is that the railway from Wellington to New Plymouth has to descend into and ascend out of each valley by a more or less steep grade. The inland hills, as a rule, do not descend gently to the nearly flat coastal belt, but rise with some abruptness from its inner margin. Thus the surface of the coastal belt and the plane joining the tops of the inland hills and ridges are distinctly unconformable. Hence the Wanganui coastal plain (sensu lato) really consists of an ancient well-dissected coastal plain bordered on its seaward side by a younger less-dissected coastal plain.
The physiography of the area immediately surrounding Patea does not differ from that of other parts of the coastal belt between Wanganui and Hawera. The gently sloping coastal plain, as elsewhere, ends in dune-capped cliffs, here about 100 ft. high. The Patea River flows at grade through the plain in a deep relatively narrow valley with cliffed sides. A mile from the sea the river is slightly entrenched in the valley-bottom, so that the small flats on either side are above ordinary flood-level. This seems to indicate recent slight elevation of the land; but, as there also seems to have been a slight depression in recent times, as shown by a submerged forest at the mouth of the Waitotara River another explanation

of the entrenchment seems desirable. This may be found in the fact that during the Recent period the sea, as shown by the cliff, has cut away several miles of land, thus shortening the course of the Patea River, and allowing it to deepen its channel for some distance above its present mouth.
Geology.
The stratigraphical geology of the Patea district is very simple. Almost horizontally-bedded claystones, known in geological literature as the Patea blue clays, are unconformably overlain by beds of gravel and sand belonging to Thomson's Hawera series. A small patch of gravel and sand forming a low hill in the Patea Valley east of the town bridge is probably quite distinct from the Hawera beds. Sand and silt form the surface of a low-lying flat near the mouth of the Patea River. Of more importance are the iron-bearing dune-sands that cap the sea-cliffs and extend for some distance back from their margin.
Patea Blue Clays, &c.
The Patea claystones are of the type which throughout New Zealand is popularly called “papa.” Like the Wanganui clays, they contain a considerable amount of fine micaceous sand, which, according to the view expressed by Marshall and Murdoch in their paper on the Tertiary rocks of the Wanganui district (10, p. 118), was probably derived from the granites of north-west Nelson. Some layers consist almost entirely of fine sand, and in places these may be crowded with shells. The claystones are exposed only along the coast-line and in the Patea Valley, where, as previously mentioned, they form cliffs on either side. A thin bed of limestone outcrops on both sides of the Patea Valley between Kakaramea Railway-station and Pirinoa Pa. This is probably at a lower horizon than the Nukumaru limestone.
During his visit to Patea last October the writer collected the following fossils from shelly layers in the sea-cliff half a mile to a mile north-west of the mouth of the Patea. The identifications have been made by Mr. John Marwick. Living species are marked by an asterisk:—
-
Ancilla sp.
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Crepidula gregaria Sow.
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Dentalium solidum Hutt.
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*Glycymeris laticostata (Q. & G.)
-
Lucinida levifoliata Marsh. & Murd.
-
Miltha sp.
-
Ostrea sp.
-
Phalium fibratum marsh. & Murd.
-
Polinices huttoni Iher.
-
Terebra sp.
-
*Verconella mandarina (Duclos)
-
Verconella cf. nodosa (Mart.)
-
*Spisula ordinaria (E. A. Smith)
In addition to the above the writer saw, but did not collect, Voluta sp., Flabellum sp., and plant-remains of various kinds. At one place wormcasts such as are commonly called “fucoids” were exceedingly abundant.
At the brickworks quarry, on the south side of the Patea River, near the bridge leading to the town, Atrina sp.—perhaps A. zelandica (Gray)—was collected.
As already mentioned, the cliffs east of the Patea River were examined by Hutton in 1884. He states that twenty-six species of Mollusca were collected from the blue clays, of which 77 per cent. were Recent (3, p. 340). His Wanganui lists mention the following twenty-five species, twenty of which are Recent, as indicated by a prefixed asterisk:—

-
*Verconella nodosa (Mart.)
-
Olivella neozelanica (Hutt.)
-
*Ancilla australis (Sow.)
-
*Ancilla depressa (Sow.)
-
*Voluta arabica Mart.
-
*Terebra tristis Desh.
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*Natica zelandica Q. & G.
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Polinices ovatus (Hutt.)
-
*Cerithidea bicarinata (Gray)
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Struthiolaria cingulata Zitt.
-
*Calyptraea maculata (Q. & G.)
-
*Crepidula costata (Sow.)
-
*Crepidula monoxyla (Less.)
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Dentalium solidum Hutt.
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*Mactra discors Gray
-
*Mactra ovata (Gray)
-
*Mactra scalpellum Reeve
-
*Zenatia acinaces Q. & G.
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*Gari lineolata (Gray)
-
*Chione mesodesma (Q. & G.), or perhaps C. marshalli Cossmann
-
*Dosinia anus (Phil.)
-
*Dosinia subrosea (Gray)
-
*Divaricella cumingi (Ad. & Ang.)
-
Cucullaea attenuta (?) Hutt.
-
*Glycymeris laticostata (Q. & G.)
Hutton's names have been revised so as to correspond with modern nomenclature, and some changes in the specific names have been made on the authority of Suter. In his paper on the Pliocene Mollusca of New Zealand, published in the Macleay Memorial Volume (1893), Hutton gives a list of Wanganuian Mollusca which broadly is the same as that published by him in 1886, but, besides making changes in nomenclature, he omits eight of the Patea records. It is hardly necessary to go into details. Hutton's lists, whichever may be taken, show a high percentage of Recent species as compared with Marshall and Murdoch's Waipipi list, and differ still more in this respect from the list of fossils collected by the writer west of Patea. If all the fossil records are combined, a total of thirty-four identified species is obtained, of which twenty-five, or 73 per cent., are Recent.
Since there is reason to believe that the Patea claystones are at least as old as the Waipipi beds, as shown by stratigraphical considerations, as well as by the occurrence of a species of Cucullaea (C. attenuata?), Dentalium solidum, Phalium fibratum, and Miltha sp., it seems likely that several of the shells identified by Hutton and Park as belonging to species still living really represented extinct species. Be this as it may, the Patea beds clearly belong to the lower part of the Wanganuian formation—that is, to the stage called “Waitotaran” by Thomson. By restricting the definition of “Waitotaran” it would be possible to introduce a third stage into the Wanganuian, and into this the Patea claystones would no doubt fall.
Hawera Series.
As developed near Patea the Hawera series appears to be typically 30 ft. to 40 ft. in thickness. The lower layers consist of beach-worn peebles mixed with much sand; the upper layers are almost wholly sand, which in places is nearly black owing to titaniferous magnetite being present in large quantity. Current-bedding is everywhere very noticeable, and some of the black sand appears to be wind-blown. Along the sea-coast the Hawera beds form the top of the cliff, and therefore cannot be closely examined. On the sides of the Patea Valley their contact with the Waitotaran beds is clearly marked by a sudden change from steep grassy slopes above to claystone cliffs below, and by numerous small springs. At one or two places near Patea, road-cuttings allow the Hawera beds and their contact with the Waitotaran claystones to be closely studied. For example, on the Wanganui road, about a mile from Patea Railway-station, brown weathered claystone (Waitotaran) is overlain by a thin layer of

gravel, above which comes 15 ft. of pebbly sand and 4 ft. or 5 ft. of loamy subsoil and soil. The seepage from these beds supplies a water-trough. On a branch road up a small valley south of the railway-station Waitotaran claystone is seen to be overlain by 30 ft. or 40 ft. of sand, mostly dark-coloured, the lower layers of which contain many pebbles of greywacke and numerous fragments of claystone. Another water-trough indicates a permanent water-seepage from the base of these beds.
Thomson (7, p. 416) explains the Hawera beds as having been deposited upon a wave-eroded surface of the Wanganuian beds during an advance of the sea. The writer's observations, though entirely supporting most of Thomson's statements, lead rather to the conclusion that the Hawera beds were formed wholly or mainly at a somewhat later stage—namely, during the subsequent retreat of the sea, caused by land-elevation.
As has been shown by Thomson, the Hawera series is unconformable to the Wanganuian formation. Since the Upper Wanganuian or Castle-cliffian is of Upper Pliocene age, the Hawera series falls into the Pleistocene. No shells were seen in it at Patea, but at Hawera Thomson collected a large number of Recent species from a shell-bed at the base of the series.
The Hawera beds, as pointed out by Thomson, give rise to a rich soil of great importance to the agriculturist.
Post-Hawera Deposits.
In the small valley south of the Patea town bridge there is a low hill formed of fine gravel and sand, similar in appearance to the gravel and sand of the Hawera series. Since this hill is far below the general level of the Hawera series, one must suppose that the material of which it is composed represents a rewash of the Hawera series.
The ferriferous sand-dunes capping the cliffs have already been mentioned several times. The material of which they are formed has probably been partly derived from the Hawera beds (as suggested by Thomson), and
partly from an ancient belt of dunes formed on the old coast-line immediately after the last elevation of the land had ceased. The prevailing wind is probably from the south-west,* and hence as the sea attacked the land, and cliffing advanced, the bulk of the ancient dune-sand was blown inland. Wind-action is strong at the cliff-edge, and keeps it clear of loose sand. Although some sand falls or is blown over the cliff, this loss is more than counterbalanced by sand derived from the Hawera series. R. Pharazyn, in 1870 (1, pp. 158–60), explained the present dune-sands on top of the cliffs along the shore of the Wanganui Bight as the remnant of a wide belt formed before cliffing began, but the idea that the sand was blown inland as the cliffs advanced was not clearly expressed in his paper.
[Footnote] * In summer there is a frequent sea breeze.

The observations made by Thomson (7, pp. 415–16) and by the present writer support the view that the ironsand of the dunes is mainly derived from the Hawera series. The rich ironsand deposit found on the beach between tide-marks west of the mouth of the Patea River may also be ascribed mainly to material derived from the Hawera series—that is, for the most part it represents a concentration of the material that falls or is blown over the cliffs.
Probably owing to the construction of moles at the mouth of the Patea River, material is at present accumulating on the beach immediately to the west of that river. Consequently cliff-erosion by the sea in this locality has ceased, and a narrow strip of sandhills, perhaps half a mile long, has formed close to the base of the cliffs, as illustrated by the annexed section.
Geological History—General Remarks.
The geological history of the coastal belt extending from Wanganui to Hawera has been described by Thomson in his paper on the Hawera series, and some of his statements are almost necessarily repeated in the following paragraphs. At the end of the Castlecliffian stage (Upper Pliocene) the whole of the Wanganui coastal plain (sensu lato) was elevated, not uniformly, but with gentle flexures which, on the whole, produced dips towards the southward. At Wanganui the uplift was not great, perhaps only 400 ft. to 500 ft.; but if Marshall and Murdoch's data (10, pp. 118–19, 127) be accepted it must have been nearly 2,500 ft. at Nukumaru, and not far short of 4,000 ft. at Waipipi. At Patea and Hawera the elevation was not less than at Waipipi, and inland, as a rule, must have been much greater. Owing to the soft nature of the Wanganuian rocks, erosion proceeded rapidly, and when elevation ceased the land was no doubt maturely dissected. Slow depression followed, and the sea, as it advanced over the land, eroded and swept away all material above its own level, thus forming a plane of marine denudation. The great amount of previous erosion and the softness of the rocks enabled it to accomplish this task without difficulty. The plane of denudation, it is fairly obvious, was not horizontal, but had a gentle seaward slope. Inland from Hawera, as previously stated, it is terraced, but in most localities it has the one uniform slope to the foot of the inland hills. Depression ceased when the land was roughly 600 ft. below its present level, and elevation began, apparently almost without delay. During the retreat of the sea the sediments deposited during the previous advance, or the greater part of them, were reassorted, and in great measure swept away. The residue, with new material brought down by the rivers of that time, forms the Hawera series. It is a remarkable fact, perhaps more consistent with Thomson's explanation of their origin than with the writer's, that the Hawera beds seem to have been deposited almost uniformly over the whole of the coastal belt from Hawera to Turakina. Towards Marton they disappear, and their place is taken by fluviatile gravels; but the country between Marton and the coast has not yet been examined in order to ascertain whether they continue along the present sea-coast towards the mouth of the Rangitikei River.
Elevation continued till the land was somewhat higher than at present, for there is evidence of recent slight depression at Patea, Waitotara, and Wanganui (Park and Thomson). At the last-named place the depression may have been considerable. A paper by Henry Hill (5) on artesian wells at Wanganui gives data that to some extent support this view.

The marine sand and gravel forming the low hill in the small valley near the Patea brickworks presumably represent a rewash of the Hawera beds deposited during a brief period of depression. Probably there were other occasional minor oscillations during the last uplift, but there is no evidence of prolonged periods of standstill.
The marine planation of a wide belt of the Wanganuian beds is a remarkable fact, which has a bearing on the geological history of other parts of New Zealand. Had the upward and downward movements of the Wanganui beds been uniform, the eroded surface would have been almost or quite parallel to the bedding-planes, more especially if there had been a hard stratum of, say, limestone just below the level of the sea at the time of greatest depression. In that case the Hawera series would have been deposited on the Wanganuian without any visible unconformity, and a contact similar to that of the Amuri limestone and the Weka Pass stone in North Canterbury would have resulted.
According to Thompson's view of the origin of the Hawera beds, their upper surface must be wave-planed; and this statement holds good in the main, even if the present writer's hypothesis of their deposition during a negative movement of the strand be correct. The planation is not confined to the area between Hawera and Turakina, but may be traced northwestward beyond Cape Egmont, and southward, with some interruption, to Otaki, and finally to the immediate neighbourhood of Wellington. The gently sloping lowland at the foot of Mount Egmont extending from Hawera to Cape Egmont and thence northward to the Kaitake Range has been wave-smoothed in the late Pleistocene. In places numerous small conical hills of volcanic origin, formed almost in Recent times, stud its surface, but evidence of planation by the sea remains. In the Shannon district, and elsewhere south of the Manawatu River, aeolian sandstones, probably younger than Castlecliffian, appear to have been planed by wave-action, an interpretation of their topography partly supported by Adkin's account (9; see also his paper of 1911), but opposed to Cotton's views (8). At present only small portions of the Wanganui coastal plain have been examined in detail by geologists. These examinations have been made independently by various workers, at various times, and for various objects. Some divergence of opinion is therefore to be expected, but this will doubtless be eliminated when the results of detailed surveys over wide areas are available.
Literature.
1. R. Pharazyn, Remarks on the Coast-line between Kai Iwi and Waitotara, on the West Coast of the Province of Wellington, Trans. N.Z. Inst., vol. 2, pp. 158–60, 1870.
2. John Buchanan, On the Wanganui Beds (Upper Tertiaries), ibid., pp. 163–66.
3. F. W. Hutton, The Wanganui System, Trans. N.Z. Inst., vol. 18, pp. 336–67, 1886.
4. James Park, On the Geology of the Western Part of Wellington Provincial District and Part of Taranaki, Rep. Geol. Explor. during 1886–87, No. 18, pp. 24–73., 1887.
5. Henry Hill, Artesian Wells at Wanganui, New Zealand, Trans. N.Z. Inst., vol. 25, pp. 348–50, 1893.
6. W. Gibson, Patea Ironsand, Ninth Ann. Rep. N Z. Geol. Surv. (part of Parl. Paper C.-2), pp. 102–3, 1915.
7. J. A. Thomson, The Hawera Series, or the So-called “Drift Formation” of Hawera, Trans. N.Z. Inst., vol. 49, pp. 414–17, 1917.
8. C. A. Cotton, The Geomorphology of the Coastal District of South-western Wellington, Trans. N.Z. Inst., vol. 50, pp. 212–22, 1918.
9. G. L. Adkin, Further Notes on the Horowhenua Coastal Plain and the Associated Physiographic Features, Trans. N.Z. Inst., vol. 51, pp. 108–18, 1919.
10. P Marshall and R. Murdoch, The Tertiary Rocks near Wanganui, Trans. N.Z. Inst., vol. 52, pp. 115–28, 1920.

Art. VIII.—The Geological History of Eastern Marlborough.
[Read before the Otago Institute, 9th November, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
| Page | |
|---|---|
| Introduction | 65 |
| A Question of Nomenclature | 66 |
| Synopsis | 67 |
| Geological History | 67 |
| The Post-Miocene Conglomerate | 68 |
| Relationship of Post-Miocene Conglomerate to Underlying Tertiary Formations | 69 |
| Involvement of Post-Miocene Conglomerate | 70 |
| Newer Pliocene | 71 |
| Conclusion | 71 |
Introduction.
In two papers, published in 1917 and 1919, Dr. J. Allan Thomson champions the views of Dr. C. A. Cotton (1913, 1914A, and 1914B) as to the genesis of the physiographic features of eastern Marlborough and origin of the socalled post-Miocene conglomerate. In the last of these papers he restates at great length the observations of McKay made in 1886, 1890, and 1892, and the opinions of Cotton, and disagrees with my view that the post-Miocene conglomerate is morainic. With the zeal of an advocate he contends that my “hypothesis involves the formation of the great Clarence and other faults in the late Notopleistocene, and is quite untenable.” Why untenable? Geophysicists recognize that the crust of the earth will be subject to tensional stresses, fracturing, and faulting so long as the denudation of mountain-chains and the piling-up of sediments on the sea-floor continue.
The view I have always maintained is that the Clarence fault is of considerable antiquity, and that the involvement of the glacial and older strata was caused by a revival of movement along the old fault-plane. Great faults are of slow growth.
As if doubtful of warranty for his extreme pronouncement, Thomson adds, “In any case, the evidence for the fluviatile origin of the lower beds of the series is overwhelming.” But even if partly fluviatile, this would not invalidate my view that the great conglomerate is morainic. There are moraines and moraines. The morainic matter carried on the back of a glacier invariably consists of a tumbled pile of angular blocks of rock. In such a deposit fluviatile material is usually absent. Curiously enough, this appears to be the only type of moraine that Thomson recognizes as undeniably glacial. But terminal moraines, of which we have in New Zealand many fine examples, both ancient and modern, are invariably composed of fluviatile drifts mingled to a greater or less extent with tumbled ice-carried blocks.
During the past two years I have attempted to determine the relative proportions of fluviatile drift and tumbled blocks in some well-known terminal moraines in Otago and Southland, and I may say that the task proved more difficult than I anticipated. The results obtained I can only claim to be rude approximations, but they are sufficiently near the truth

to demonstrate the conspicuous part played by fluviatile drifts in the structure of such deposits. In all cases the observations were made at points free from re-sorting.
The great Clyde moraine contains about 60 per cent. of silts, sands, and gravels of fluviatile origin; the Queenstown Domain moraine, 55 per cent.; the Kingston moraine, 55 per cent.; the Manapouri moraine, 65 per cent. The Clyde, Kingston, and Manapouri moraines appear to rest on beds of fluviatile drift. I have not yet made a quantitative estimate of the material composing the Tasman terminal moraine, but if my recollection is not at fault I should say that fluviatile drift is conspicuously represented. According to many independent writers, the Pleistocene glacial deposits of Canada and the United States contain a large, or even dominant, proportion of fluviatile material.
A Question of Nomenclature.
Before going further I wish to express my views as to some new names that have been lately suggested by Thomson. In my paper (1905, pp. 497–501) “On the Marine Tertiaries of Otago and Southland” I recognized (a) that the main orographical features of New Zealand were determined by an early Cretaceous diastrophic movement that folded and elevated the Juro-Triassic and older formations, and (b) that the Upper Cretaceous and Tertiary strata were laid down as “marginal” deposits on a platform that contoured around the early Cretaceous strand. These views I reiterated in 1910 (p. 85). Thomson (1917 p. 407), in a discussion of the younger covering strata, thought it “desirable for many purposes in New Zealand geology to have a name which will embrace them all, a name which will replace the earlier name of ‘marginal rocks’ used by Park and myself, and the physiographic and structural term of ‘covering strata,’ when an age significance is intended.”
I was the first to describe (1905) the late Cretaceous and Tertiary strata as “marginal,” and have no recollection that this term was used by Thomson till many years afterwards. Apart from this, I am in agreement with him that the substitution of a name for my “marginal” strata is desirable. But the term “Notocene,” which he has suggested, is inappropriate; and I agree with Marshall (1919, p. 240) that it is unscientific. The suffix “cene” (from kainos = recent) is used as the termination of the four epochs into which the Cainozoic era has been divided, and to use it in the structure of a word intended to cover the Upper Cretaceous and the whole of the Cainozoic would be certain to lead to misunderstanding. Moreover, there is nothing recent about the Albian and later groups of the Upper Cretaceous, in the sense that “cene” is used in the words Eocene and Miocene. If it had not been previously used in a much narrower sense—that is, as meaning Cretaceo-Eocene—Hector's term “Cretaceo-Tertiary” would be quite satisfactory, but it must also be ruled out on the score of possible confusion.
Following the precedent set by the Geological Survey of India, a native group-name may be appropriately used for the marginal Cretaceo-Pliocene strata of New Zealand. The name I now suggest is “Awatean.”*
For the post-Jurassic and pre-Albian N.E.—S.W. orogenic movements that folded and elevated the Juro-Triassic of the main chains I propose to use the term “Rangitatan movement.”
[Footnote] * Awatea was the name of the great Polynesian deity who heralded the emergence of the land from the void.

In 1916 Cotton gave the name “Kaikoura movements” to the Pliocene uplift that affected eastern Marlborough. I was the first (1905, pp. 501–2, and 1910, p. 110) to recognize and describe the differential character of this uplift, and should prefer the name “Ruahine movement.” In the Ruahine Range the effects of differential axial elevation are better displayed than elsewhere. Moreover, Professor Suess (1909) included the Ruahine Range of New Zealand in his Third Australian Arc of folding, elevation, and vulcanicity, and used the name “Ruahine” as representative of the uplift and vulcanicity of that region. I think the term “Ruahine movement” ought to stand.
Synopsis.
My view is that the folding and elevation of the Juro-Triassic and older rocks took place in the pre-Albian period of the Lower Cretaceous. This orogenic movement, which I have called the “Rangitatan movement,” gave birth to the existing N.E.—S.W. axial chains of New Zealand, The folding was accompanied by fracturing, faulting, and subsidence along lines of structural weakness. The climatic conditions were pluvial, and the denudation of the newly uplifted chains was relatively rapid.
During the Albian, while the peneplaining of the mainland was in progress, the sea began to invade the Clarence depression, where it laid down Albian sediments. At the close of the Albian the Cenomanian transgression became general, and soon the sea encroached on the newly formed peneplain, Tahora,* that everywhere fringed the remnants of the main chains. On the surface of this peneplain, and on the Albian beds already deposited in the Clarence depression, sediments were laid down throughout the remainder of the Upper Cretaceous period.
Then followed the Eocene uplift, during which the weak post-Albian beds were removed from the greater part of the uplifted Tahoran peneplain and from the Clarence depression. At the close of the Eocene began the Oamaruian subsidence, during which the great Miocene formation was deposited, in some areas on the slightly eroded surface of the surviving Cretaceous strata, but mainly on the surface of the recently uncovered peneplain.
At the close of the Miocene there began a differential uplift in Otago and Auckland, pivoting on the Napier—Wanganui zone, where the movement still continued downward, this arising from the thrust accompanying the tilting of the ends of the main chains.
Before the advent of the newer Pliocene the Marlborough and north Hawke's Bay areas were raised above sea-level. In the Napier—Wanganui zone the deposition of marine sediments continued till the close of the newer Pliocene, when this region also rose above sea-level.
During the succeeding Pleistocene the alpine chains and the Kaikouras were covered with ice-fields that fed the Clarence glacier, which, in my opinion, formed the great post-Miocene conglomerate.
Geological History.
In Marlborough we are confronted with geological and physiographic conditions altogether unlike those prevailing along the main axial chain. The Inland Kaikoura and Seaward Kaikoura Mountains are well-defined ranges composed of folded argillites and greywackes of Juro-Triassic age, in
[Footnote] * In Maori, tahora = great plains and low-lying maritime lands.

many places intruded by a network of basic, semi-basic, and acidic dykes. The post-Jurassic (or Rangitatan) diastrophic movement that folded the ranges of the main axial divide was also responsible for the folding and elevation of the Kaikoura chains, and the subsequent intrusion of the igneous magmas.
McKay (1886, p. 65) has shown that the rocks composing these chains are arranged in two simple synclinal folds, separated by an anticlinal fold, the crest of which runs parallel with the present course of the Clarence Valley.*
The folding and elevation of the Jurassic and older rocks took place in the pre-Albian stage of the Lower Cretaceous. The denudation of the newly elevated folds of the main divide began immediately, and continued throughout the whole of the Albian, resulting in the base-levelling of the great peneplain elsewhere called Tahora. At this time the Seaward Kaikoura chain existed as an island, or as a long narrow peninsula.
During the progress of the Albian base-levelling of the mainland, Albian sediments were being deposited in the deep, clear waters of the fiord-like Clarence Sound, that separated the Kaikoura chains. After the post-Jurassic folding, and before the Albian, the crown of the Clarence anticline was deformed by powerful faults, the most important of which followed the base of the Inland Kaikoura chain.
The floor of the Clarence Valley is occupied by a sheet of strata many thousand feet in thickness, ranging in age from Lower Utatur (Albian) to newer Pliocene or even Pleistocene. Two unconformities have been recognized in this pile of material. The Lower Utatur strata are followed by the Amuri limestone, which, according to Henry Woods (1917, p. 4), favours the view that the latter is of Tertiary age, since the Upper Utatur (Lower Chalk) beds that normally follow the Lower Utatur in India, Japan, Madagascar, and Zululand are not known to be represented in New Zealand. The second unconformity comes between the Awaterean marine clays and a remarkable deposit which McKay (1886) called the “post-Miocene conglomerate.”
The Post-Miocene Conglomerate.
This deposit attains in places a thickness of 600 ft. It is mainly composed of water-worn drift, derived from the Juro-Triassic argillites, greywackes, and associated dyke-rocks that compose the Kaikoura chains, mingled with a confused pell-mell of angular slabs and irregular masses of Amuri limestone, “gray marls,” and fossiliferous Awatere (older Pliocene) clay-rock, some of the former of enormous size. Patches of this deposit occur near the Marlborough coast, resting on an eroded surface of the Amuri limestone. But its greatest development is in the Clarence Valley, where it lies on the “grey marls,” a clayey formation that conformably follows the Amuri limestone.
McKay in his report on the Cape Campbell district (1876, p. 190) gives a good description of this breccia-conglomerate. He says, “These conglomerates are composed in chief part of well-rounded boulders, but have a large percentage of angular blocks of great size, so that they often present the appearance of old morainic accumulations. A great variety of rocks
[Footnote] * Thomson (1919, p. 305) expresses the opinion that the strikes observed by him would tend to show that a strike west of north is prevalent in at least some parts of the Kaikoura area; and Cotton (1913, p. 244), arguing from the variability of strikes and dip, considers it probable that the older axes of folding make an angle with the general N.E.—S.W. trend of the chains. In my opinion the meagre evidence produced by these writers is not sufficient to invalidate the considered generalizations of McKay.

is represented in these conglomerates, including old slates and sandstones and crystalline rocks from the inland ranges, volcanic rocks belonging to the Amuri group, green sandstone from the ‘saurian beds,’ and great masses of Amuri limestone, and large blocks of fossiliferous conglomerate containing abundance of Awatere fossils; also blocks of sandy limestone and fine-grained standstones with abundance of Awatere fossils. These beds cannot be less than 200 ft. in thickness, and in places they rise to a height of 850 ft. above the sea. Like the Awatere beds, the conglomerates never pass to the eastward of the Amuri limestone, nor do they reach to the lower grounds on the west side of the range; but, as they are but the remnant of a formation that must once have covered a considerable extent of country, other outliers of them will probably yet be found to the south and west.”
Referring to the conglomerates at Heaver's Creek, he says (1886, p. 115), “They are rudely stratified, at places showing that the beds are standing nearly vertical; in the lower part are enormous blocks of Amuri limestone and masses of soft marly strata, which it seems impossible to convey any distance and deposit in the position in which they are found…. It is impossible to give any description which will convey a correct idea of the pell-mell manner in which the various materials of this conglomerate-breccia are mixed together.” Further on he says some of the masses of Amuri limestone in this deposit at Shades Creek “are of such an extent that at first sight they might be taken for an outcrop of this rock in situ.”
Relationship of Post-Miocene Conglomerate to Underlying Tertiary Formations.
The stratigraphical succession of the formations represented in eastern Marlborough is:—
| (1.) |
Post-Miocene conglomerate. |
| (2.) |
Awatere clay and marly beds. |
| (3.) |
“Grey marls.” |
| (4.) |
Amuri limestone. |
| (5.) |
Cretaceous strata. |
| (6.) |
Juro-Triassic basement rocks. |
Near the coast the conglomerate-breccia rests on the Amuri limestone, and in the Clarence Valley on the “grey marls.” It contains angular masses derived from the underlying Cretaceous strata, Amuri limestone, “grey marls,” and Awatere beds. McKay (1886 and 1890) and Hector (1886) considered it unconformable to the Awatere beds, a conclusion which I had no difficulty in endorsing in 1910.
Cotton (1910), in a general account of the geology and physiography of eastern Marlborough, expressed the view that the conglomerate-breccia was conformable to the “grey marls,” and this opinion appears to be supported by Thomson (1919). If this tumbled and confused deposit is conformable to the “grey marls,” the question arises, what has become of the Awatere beds? And in like manner, where it rests on the Amuri limestone, we may ask, what has become of both the “grey marls” and Awatere beds? It may be suggested that the conglomerate-breccia is the equivalent of the Awatere beds; but clearly this is impossible, as large masses of the latter are contained in the conglomerate.
Referring to the difficulty presented by the view of conformity, Thomson (1919) says, “Cotton accounts for the peculiar features of the conglomerate—viz., that it lies conformably on the ‘grey marls’ but contains materials

of all the underlying Notocene [Cretaceous and Tertiary]. beds—by assuming that a neighbouring area was differentially elevated to the extent of perhaps as much as 12,000 ft. without seriously disturbing the horizontal attitude of that portion of the Notocene series which, a little later, had the conglomerate deposited upon it.” This hypothetic assumption does not make the position easier. By all the criteria of stratigraphical geology, whatever its origin, there must be a time-break between the conglomerate-breccia and the “grey marls.”
Involvement of Post-Miocene Conglomerate.
Along the base of the Inland Kaikoura Range the Cretaceous and Tertiary deposits, including the post-Miocene conglomerate, are down-faulted towards the north-west, and appear to plunge below the Juro-Triassic rocks composing that chain.
There is no evidence that the Kaikoura chains were ever reduced to a sea-level peneplain, and all surmises to the contrary are purely hypothetical. At the time the Tahoran peneplain was being base-levelled the Kaikouras existed as ridges, separated by the Clarence Valley, into which the sea during the Albian stage gradually encroached. The advancing sea first formed a basal bed of conglomerate, which is entirely composed of material derived from the neighbouring mountain-walls. As the sea continued its invasion of the Clarence Valley the bed of conglomerate spread slowly landward, forming a deltaic deposit, on the emergent surface of which vegetation grew till destroyed and buried by sediments deposited by the advancing sea.
If the sea advanced from the north-east, as seems to be indicated by the distribution of the Cretaceous strata and Amuri limestone, the conglomerates laid down at the head of the sound should be coeval with the fine marine sediments deposited in the deeper water near the entrance of the sound. As the transgression progressed the conglomerates became everywhere covered with the finer muds and sands of the Upper Utatur.
At the beginning of the Cenomanian the advancing sea overspread the base-levelled Tahoran peneplain and covered it with a sheet of Upper Cretaceous sediments. During the Eocene uplift the newly formed Upper Cretaceous sediments in the Clarence fiord, in north and west Nelson, and throughout Westland, Southland, and south Otago, were completely removed by denudation. Only in north Otago and Canterbury did some remnants escape the general destruction of this period.
The Eocene uplift was followed by slow persistent submergence, during which the Oamaruian and Awatere sediments were deposited. At the close of the Miocene, differential uplift began along the axial chains, accompanied at the north and south by a tilting movement that pivoted about a zone extending from Napier to Wanganui, along which submergence continued till the close of the Pliocene, as witnessed by the newer Pliocene beds on the coasts of Hawke's Bay and Wanganui Bight. The movement was faster along the axial divide than at the east and west coasts, and this generated crustal stresses which found relief by fracturing and faulting, followed by the uplift and tilting of mountain blocks.
There was also, as already indicated, a general tilting of both ends of New Zealand coeval with the axial uplift. This tilt was greatest in Auckland and Otago, and least in the Napier-Wanganui zone. As a consequence of this unequal uplift the youngest marine strata known in Otago and south Canterbury are late Miocene; in Marlborough. older Pliocene: and in the Wanganui and Hawke's Bay areas, newer Pliocene.

Newer Pliocene.
As a further consequence of the pivotal (or differential) elevation, the refrigeration which afterwards culminated in the glaciation of a large part of the South Island and a small part of the North Island began in Otago and Southland as far back as the early Pliocene, and in Marlborough in the late Pliocene. The general advance of the alpine glaciers began in the late Pliocene, and throughout the South Island this was a period of intense fluviatile activity. In the early Pleistocene the high Kaikoura chains were covered with permanent ice-fields that fed the Clarence glacier, the terminal face of which reached the sea at the time of maximum refrigeration.
It was during the early Pleistocene that the Marlborough fluvio-glacial conglomerate was deposited. The piling-up of from 4,000 ft. to 12,000 ft. of sediments and other rocky detritus on the floor of the Clarence Valley disturbed the isostatic condition of the crustal strip lying along the Clarence fault, and as a result of this disturbance there was a revival of movement along the old fault-plane. McKay reported in 1886 that a distinct depression marked the line of the great fault, and this depression was said by the settlers to have been formed by the historic earthquake of 1855, which is also known to have opened gigantic earth-rents in other parts of Marlborough, as well as in Wellington.
I would suggest that it was the overloading of the Clarence segment which caused the Inland Kaikoura chain to creep towards the south-west. This and crustal weakness originated the overthrust which eventually entangled the Cretaceous and Tertiary strata and post-Miocene conglomerate along the course of the Clarence fault. But this suggestion is purely hypothetical and incapable of proof.
Conclusion.
Herbert Spencer has laid it down in his First Principles that no hypothesis is capable of more than partial proof, and that of two rival hypotheses the one that approaches nearest the truth is that which does least violence to fundamental principles. I venture to think that Cotton's titanic faulting and stupendous walls of weak, unconsolidated sediments (vide fig. 2, Cotton, 1913) postulate conditions that appear almost impossible. Moreover, his and Thomson's contention that the post-Miocene conglomerate is conformable to the “grey marls,” notwithstanding that it is composed of material derived from all the underlying formations, is opposed to all the canons of stratigraphical geology. The view of conformity did not even suggest itself to Hector, McKay, or myself.
According to Cotton's hypothesis, the faulting was a single catastrophic movement of such magnitude as to expose the Tertiary and Cretaceous strata in a stupendous fault-scarp from the steep face of which blocks and vast slabs of the different beds, under the influence of gravity, fell or slid into the valley below, forming the “pell-mell” so well described by McKay. But the blocks are contained in a matrix of fluviatile drift composed mainly of the basement Juro-Triassic rocks. Evidently the Clarence Valley was already drained by a well-established river-system. It seems incredible that the titanic dislocation required by Cotton's view could have taken place without causing serious disarrangement of the pre-existing drainage-system.
If it be conceivable that the faulting proceeded by a series of catastrophic displacements that exposed in a steep escarpment first the Tertiary and

afterwards the Cretaceous strata in the order to their superposition, we should expect to find the Awatere rocks, as the first exposed to shattering and crumbling, predominating in a stratum towards the base of the great conglomerate. Above this stratum there should appear a succession of layers dominated by blocks of “grey marl,” Amuri limestone, and Cretaceous rocks, and in the inverse order of their superposition. But the blocks of the different formations do not occur in this orderly succession: they are mingled in a confused jumble. Clearly this conception also fails.
It is generally recognized that all great faults are of slow growth. If the growth of the Clarence fault were slow, the denudation of the newly uplifted covering strata would result in the formation of the slopes normal to weak strata, and there would be no dislocation of the established drainage-system.
The Tertiary strata were laid down on the floor of the sea, and elevated before the process of shattering and denudation began. Surely this uplift and the geographical changes which it brought about must represent a time-break between the post-Miocene conglomerate and the underlying Tertiary strata which figure so conspicuously in its composition.
I do not know of any natural agency other than ice that could transport and leave stranded among fluviatile drifts slab-like masses of soft friable rock ranging from a few feet up to 70 ft. in length; and I can see nothing unreasonable in my suggestion that high chains like the Kaikouras could support ice-fields during the period of Pleistocene maximum refrigeration. I do not suggest that my view is the obvious truth. My contention is that it is a reasonable interpretation of the known facts. The obvious truth may often resemble a truism, which Carlyle has defined as an invention for concealing the real truth. The uplifted hand may obscure a landscape; and a simple truth may be presented in such a manner as to hide a whole gospel.
References.
Cotton, C. A., 1913. The Physiography of the Middle Clarence Valley, New Zealand, Geog. Jour., vol. 42, pp. 225–45.
—– 1914A. The Relations of the Great Marlborough Conglomerate to the Underlying Formation in the Middle Clarence Valley, New Zealand, Jour. Geol., vol. 22, pp. 346–63.
—– 1914B. Preliminary Note on the Uplifted East Coast of Marlborough, Trans. N.Z. Inst., vol. 46, pp. 286–94.
McKay, A., 1876. Report on Cape Campbell District, Rep. Geol. Explor., 1874–76, pp. 185–91.
—– 1886. On the Geology of the Eastern Part of Marlborough Provincial District, Rep. Geol. Explor., No. 17, pp. 27–136, with map.
—– 1890A. On the Earthquakes of September, 1888, in the Amuri and Marlborough Districts of the South Island, Rep. Geol. Explor., No. 20, pp. 1–16.
—– 1890B. On the Geology of Marlborough and the Amuri District of Nelson, ibid., pp. 85–185, with col. map.
—– 1892. On the Geology of Marlborough and South-east Nelson, Part II, Rep. Geol. Explor., No. 21, pp. 1–30, with map.
Marshall, P., 1919. Fauna of the Hampden Beds and Classification of the Oamaru System, Trans. N.Z. Inst., vol. 51, pp. 226–50.
Park, J., 1905. On the Marine Tertiaries of Otago and Canterbury, with Special Reference to the Relations existing between the Pareora and Oamaru Series, Trans. N.Z. Inst., vol. 37, pp. 489–551.
—– 1910. Geology of New Zealand.
Thomson, J. A., 1917. Diastrophic and other Considerations in Classification and Correlation, and the Existence of Minor Diastrophic Districts in the Notocene, Trans. N.Z. Inst, vol. 49, pp. 397–413.
—– 1919. The Geology of the Middle Clarence and Ure Valleys, East Marlborough. New Zealand, Trans. N.Z. Inst., vol. 51, pp. 289–349.
Woods, H., 1917. The Cretaceous Faunas of the North-eastern Part of the South Island of New Zealand, N.Z. Geol. Surv. Pal. Bull. No. 4.

Art. IX.—The Birth and Development of New Zealand.
[Read before the New Zealand Science Congress, Palmerston North, 26th January, 1921; received by Editor, 2nd February, 1921; issued separately, 27th June, 1921.]
Though it contains in its fabric rocks of great antiquity, considered as a geographical unit New Zealand is, geologically speaking, very young. We must ever bear in mind that, though it may be built of stones of great antiquity, a house is not older than its builder. And so it is with New Zealand. Its framework is composed of an extraordinary pile of Palaeozoic and Mesozoic rocks, but it was not till the Cretaceous epoch that these rocks were built up into the mountain-chains and other land-forms familiarly known to us by the geographical name “New Zealand.”
The Palaeozoic sediments were derived from the denudation of a land area that formerly occupied the greater part of the Southern Hemisphere. This ancient continent certainly existed throughout the whole of the Palaeozoic era, and eventually became submerged some time in the Mesozoic. Like the larger continents of the present day, this Archaean land was dominated by mountain-chains, tablelands, and plains, and its coasts were deeply indented with bays and estuaries. Though no trace of this Pacific continent now remains, the pile of sediments derived from the wear-and-tear of its surface tells us that it was no arid land, but possessed an abundant rainfall. Moreover, there is evidence that in the Cambrian, Devonian, and Permian epochs its alpine chains were covered with an ice cap from which tongues of ice reached down the mountain-glens towards the sea.
The great rivers which drained the highlands built up mighty deltas along the ancient strands, covering the floor of the seas where New Zealand now stands with sands and muds many thousand feet in thickness. But we must not assume that deposition was continuous in the New Zealand area throughout the whole of the Palaeozoic. No rocks of Devonian or Carboniferous age are known in New Zealand, and from this we infer that during a great hiatus, the exact limits of which are not yet definitely ascertained, there was a cessation of deposition on the floor of the seas covering the area now contained within our borders. The cessation of deposition on a sea-floor may arise from the profound submergence of the land area providing the sediments, or from the uplift of the sea-floor as a consequence of crustal folding or a recession of the sea. By submergence the scene of deposition is shifted landward, and by uplift seaward. The absence of Devonian and Carboniferous rocks leaves a tremendous gap in the geological history of New Zealand, and is ascribed to crustal folding that raised the sea-floor, thereby enlarging the borders of the ancient Palaeozoic continent.
In the late Carboniferous there began a general transgression of the sea that submerged the coastal lands and permitted the deposition of the Permo-Carboniferous Maitai series on the folded rocks of the Silurian and

older epochs. The succeeding Permian was an epoch characterized by earth-movement, and the intrusion of granitic and dioritic magmas on a gigantic scale.
The Palaeozoic formations contain an abundant marine fauna that in many respects shows a curious resemblance to the contemporary faunas of Europe and North America; but of the Psilophytales—the rootless and leafless land-plants of pre-Devonian Europe—and of the prolific Carboniferous flora of the greater continents there is no trace in New Zealand. For an explanation of this we must look to the land-movements that brought about the great Devonian-Carboniferous hiatus. And this leads to the surmise that the ancient continent on the shores of which the Palaeozoic sediments of New Zealand were laid down had no direct land connection with the Palaeozoic land areas of the Northern Hemisphere—a surmise further strengthened by the absence of the typical Glossopteris flora of the hypothetical Gondwanaland of the South Pacific.
But to return to the New Zealand area. After the cessation of the Permian diastrophic movements already described, normal deposition continued without interruption throughout the Triassic and Jurassic epochs, the sediments being derived from the denudation of the ancient continent, which was now larger in area, having been augmented in size by the addition of the uplifted Palaeozoic rocks of the New Zealand area. The Mesozoic sediments consist mainly of alternating beds of deltaic sands and muds, in places intercalated with marine beds containing a rich assemblage of fossil molluscs that in general facies bears a striking resemblance to the contemporary Mesozoic marine faunas of Europe. It is noteworthy that, though beds of limestone are common in all the Palaeozoic formations no limestones occur among the Juro-Triassic strata of New Zealand. This circumstance may possibly be ascribed to the prevailing deltaic conditions of deposition, which, as we know, would not favour the growth of limestone-building organisms.
Up till the close of the Jurassic epoch New Zealand had not come into existence, but for a million centuries rocky materials had been accumulating on the site it was destined to occupy. The early Cretaceous witnessed the birth of the new land. At this time there began two syntaxial crustal movements that folded and ridged the Mesozoic and older rocks into great chains. Of these, the Rangitatan, a north-east and south-west movement, produced the main alpine chains, and the Hokonuian the northwest and south-east transverse chains. These movements built up and gave definite form to the framework of New Zealand as we now know it. They were accompanied by rock-shattering and faulting, and the extrusion of igneous magmas, mostly of basic and ultra-basic types. This period of intense crustal movement also brought about the foundering and submergence of the ancient continent that had existed in the south from Archaean times, shedding the materials of which the Palaeozoic and Mesozoic rocks were mainly composed. The disappearance of the parent continent was doubtless a consequence of the process of crustal adjustment, or compensation, arising from the emergence of New Zealand from the floor of the ocean.
The aphorism of Plato that a country is only as old as its mountains contains more than a grain of truth, and in the case of New Zealand is actually true. The mountain-chains came into existence in the early Cretaceous, and it was in that epoch that the real history of New Zealand as a geographical unit began.

The Cretaceous and Tertiary formations are marginal deposits mainly composed of materials derived from the wear-and-tear of the axial chains. The post-Albian history of New Zealand is a chronicle of denudation, submergence, uplift, faultings, vulcanicity, glaciation, and river erosion, all of which have taken an active part in modifying and shaping the topographical forms with which we are familiar.
In the early Cretaceous the foothills, transverse chains, and even the lower parts of the axial chains became worn down to a peneplain that bordered the coast on all sides. When the peneplain became submerged by the mid-Cretaceous transgression of the sea, the area of the dry land was correspondingly diminished. It is probable that the New Zealand of this period was represented by a long narrow island, or by a chain of islands, of moderate relief, deeply indented with bays and sounds, and drained by numerous small streams. The submerged peneplain was now a sea-floor, and on it accumulated the marginal pile of Cretaceous and Tertiary sediments, which as partially consolidated and elevated strata may now be seen fringing many parts of the sea-coast in both Islands, and as down-faulted blocks on the flanks of the alpine chains. When we speak of the marginal pile of Cretaceous and Tertiary strata we do not wish it to be inferred that deposition was continuous. As a matter of fact, we know that it was broken by a considerable hiatus in the early Eocene.
The Cenomanian transgression was preceded by the deposition of deltaic and estuarine silts and muds, on the emergent surface of which there grew a dense jungle vegetation. The vegetable remains were subsequently buried by the sediments laid down by the advancing sea, and afterwards formed the coal-seams of our Upper Cretaceous measures. The Upper Cretaceous strata constitute what is called the Waipara formation.
At the close of the Cretaceous there was a general uplift which lasted well into the Eocene. During this uplift the greater part of the newly formed Cretaceous sediments was removed by denudation, thereby uncovering the pre-Albian peneplain.
Towards the close of the Eocene there took place another transgression of the sea, which was preceded by the deposition of deltaic sediments on the surface of the recently uncovered peneplain. A jungle vegetation flourished for some time on the emergent deltaic flats. Afterwards the marine sediments laid down by the advancing Miocene sea covered and preserved the vegetable remains.
The late Cretaceous and older Tertiary movements were unaccompanied by crustal folding, and as a consequence the stratigraphical break between the Upper Cretaceous and Lower Tertiary formations is generally insignificant. But in New Zealand, as elsewhere, the close of the Cretaceous witnessed momentous faunal changes.
The Miocene coal-measures and the associated marine strata that cover them constitute the well-known Oamaruian formation.
In the central, or Cook Strait, area deposition continued uninterruptedly till the close of the Pliocene, but in the north Auckland region and in that part of the South Island lying to the south of the Trelissick Basin marine strata of Pliocene age are absent. So far as we know, the Tertiary succession of marine strata in the far north and south of New Zealand ended with the deposition of the Awamoan beds, of Upper Miocene age. The Awamoan is the closing member of the great Oamaruian formation as developed in north Auckland, south Canterbury, Otago, and Southland. The abrupt

cessation of marine deposition in these parts is, I think, a good reason for considering the Oamaruian a distinct geological unit in the chronological succession of the Tertiary formations.
A cessation of deposition, or even an abrupt faunal change, is merely the expression of a geographical change. The absence of marine Pliocene deposits in the north and south of New Zealand must be regarded as a consequence of a differential elevation that raised the sea-floor in these parts till it became dry land, but did not affect the central region till late in the Pliocene.
At the close of the Pliocene the differential uplift became general throughout the length and breadth of New Zealand, the movement being more rapid along the axis of the main chains than towards the coasts to the east and west. The unequal upward movement raised the marginal cover of Tertiary strata high up on the flanks of the upraised axial chains, and at the same time subjected the rocks composing these chains to stresses that found relief by the formation of powerful faults. The major faults run more or less parallel with the trend of the folded chains. Thus in western Southland and in Otago they run north and south; in Canterbury, Marlborough, Wellington, Hawke's Bay, and south Auckland, north-east and south-west; in eastern Southland, north Nelson, and north Auckland, north-west and south-east.
The ancient peneplain, Tahora, which for a hundred thousand generations had exercised a powerful influence on the arrangement and distribution of the younger formations, now became deeply dissected, and for the most part almost obliterated, by the intense pluvial and glacial erosion of the Pleistocene period. In almost all cases the lines of dissection followed fault-planes, along which the rocks were, as a rule, shattered, and hence incapable of offering an effective resistance to the turbulent mountain-streams and the ponderous advance of the Pleistocene ice-sheet. The dissection of the uplifted peneplain was preceded by the removal from its surface of the covering strata, except along the coast and in the trough-faulted mountain-basins, where they were in some measure protected from the full activities of subaerial denudation.
The Pliocene uplift, elsewhere called the Ruahine movement,* gave the finishing-touches to the structure of New Zealand. The crustal dislocations and faultings which accompanied it determined the lines of the great trunk rivers, already well established in their courses when the Pleistocene refrigeration began. The Pleistocene glaciers descending from the alpine chains ploughed out and deepened the valleys, smoothed the contours of the mountain-slopes, and wore down to rounded hummocks the rocky ridges lying in their path. Before their final retreat they piled up vast moraines that will always remain as imperishable monuments of the iron grip in which in the near past the great Ice King held this now sunny land.
[Footnote] * See head of p. 67 of this volume.

Art. X.—Some Tertiary Mollusca, with Descriptions of New Species.
[Read before the Wanganui Philosophical Society, 25th October, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
Plates XIV–XIX.
Melina zealandica Suter. (Plate XIV, figs. 1, 2.)
M. zealandica Sut., N.Z. Geol. Sur. Pal. Bull. No. 5: Marshall and Murdoch, Trans. N.Z. Inst., vol. 52, p. 136, pl. 9, fig. 21; pl. 10, fig. 20.
Complete valves of this fine species were recently obtained. They are more oblique than appears in our figure of the restored valve, and there is also considerable difference between the young or medium-sized individuals and the large adult form. The latter is here illustrated by the photograph of a right valve, and shows the dorsal margin not markedly oblique to the body of the shell, while in some smaller individuals it is most pronounced and the posterio-ventral area considerably produced. But for the fact that intermediate forms occur and that they are all found together they might well have been regarded as distinct species. There also occurred an imperfect smaller valve, which is clothed with a thick periostracum, almost black.
Adult: Height, 150 mm.; length of hinge, 135 mm.; length of body across adductor-scar, 116 mm.
Locality: On the coast about three miles north of the Waipipi Stream, Waverley. This species also occurs in the Trelissick Basin, and at Target Gully, Oamaru.
Ostrea gudexi Suter. (Plate XV, fig. 1.)
N.Z. Geol. Sur. Pal. Bull. No. 5, p. 71, pl. 8, fig. 2.
Suter's paratypes from Kakahu show a considerable variation in the number of radial ribs; the typical form has seven to eight, others fifteen or more, excluding the small ribs on the posterio-dorsal area. Some specimens which appear to belong to this species have recently been found at Pahi. This (Pahi) form has nineteen to twenty ribs, with an additional five or six much smaller on the depressed posterio-dorsal wing.
Height, 30 mm.; length, 25 mm.
Locality: Pahi. Collected by Marshall. Material, two left valves.
Thracea magna n. sp. (Plate XV, figs. 2, 3.)
Description derived from right valves.
Shell large, oblong, inequilateral, beak at the posterior third, the umbo swollen and prominently curved inwards; the anterior dorsal margin long, slightly curved and declining, the end rounded; posterior dorsal margin

short, excavated below the beak, thence almost straight and slightly declining, the end obliquely truncated, basal margin lightly curved, ascending a little more rapidly to the anterior end; the posterior area is defined by a broad subangular ridge which descends from near the beak to the lower margin of the truncation, a smaller ridge similarly proceeding unites with its dorsal margin. Sculpture consists of fine growth-lines, irregular in places, and more pronounced on the posterior area; there does not appear to be any radial sculpture. Hinge without teeth, but with a strong inward-projecting lithodesma; the pallial sinus and adductor impressions obscure, the posterior adductor apparently large and near to the end.
Length, 78 mm.; height, 49 mm.; diameter of a single valve, 14 mm. Another valve: length, 68 mm.; height, 44 mm.
Type to be presented to the Wanganui Museum.
Locality: On the coast about three miles north of the Waipipi Stream, in brown sand and blue sandy clay.
The material consists of two right valves and one left, the latter rather fragmentary. In size it may be compared with Thracea sp. H. Woods, N.Z. Geol. Sur. Bull. No. 4, p. 34, pl. 19, figs. 4a, 4b. It shows even greater convexity than that species, and the beak is distinctly more posterior.
Miltha neozelanica n. sp. (Plate XVI, figs. 1, 2, and Plate XVII, fig. 1.)
Shell large, ovately subrotund, compressed, left valve distinctly more compressed than the right; beaks small, curved forward, and nearer to the anterior end; immediately in front of the beak is a small triangular area of the margin sharply inflexed to almost half the depth of the hinge-plate; the anterior dorsal area narrow and inconspicuous, the margin convex, declining, and forming a small distinct angle at the end, from this is a wide uniform curve continued around the ventral margin and terminating in a more pronounced angle at the posterior end; the posterior dorsal margin convex and regularly declining. On the posterior dorsal area of each valve one or two feeble corrugations following the curve of the margin. Sculpture consists of fine concentric threadlets, somewhat irregular towards the ventral margin, and rather more sharply raised on the posterior dorsal area; radiate striation is very obscure, indications of it in places only. The hinge-plate wide with two cardinals in each valve, the anterior small, separated by a narrow triangular pit; laterals consisting of a simple ridge on each side, the posterior almost obsolete; ligament and resilium deeply inset. Adductors, the posterior small ovate, the anterior large and much elongated, the lower end almost in a line vertical to the beak; pallial line impressed and distant from the margin, the latter smooth. The disc is more or less punctate and with small raised processes indicating attachment of the mantle; all valves have a rather broad oblique sulcus on the middle area.
Height, 94 mm.; length, 91 mm.; thickness of united valves, 32 mm. A right valve: height, 64 mm.; length, 68 mm.
Type to be presented to the Wanganui Museum.
Locality: On the coast about three miles north of the Waipipi Stream, in brown sands and in blue sandy clay; also in the sea-cliff near to the Hawera County metal-pit, Whakina.
In the list of fossils occurring in the Waipipi beds this species is recorded as Dosinia magna Hutton (Trans. N.Z. Inst., vol. 52, p. 124, 1920). In large specimens the anterior and posterior angles are more or less obscure

but in medium-sized examples are very distinct, and frequently the length of the valve exceeds the height.
This is the first record of a species of Miltha in New Zealand. Its large size and the fact that the Lucinidae are poorly represented in this country make this occurrence noteworthy.
Miltha dosiniformis n. sp. (Plate XVII, figs. 2, 2A.)
Shell large, solid, subrotund, somewhat compressed, the left valve rather less inflated; beaks small, a little anterior, and slightly curved forward; the anterior dorsal area narrow and inconspicuous, the margin slowly declining, uniformly curved around the end and ventral margin; the posterior dorsal margin slightly convex, declining, lightly angled at its termination, the end subtruncate; the posterior dorsal area with a well-marked ridge. Sculpture consists of fine concentric threads, somewhat irregularly disposed; the specimen is slightly eroded, but there does not appear to be any radial sculpture. Valves united and filled with hard matrix.
Height, 78 mm.; length, 83 mm.; thickness of united valves, 29 mm. Another example: height, 79 mm.; length, 81 mm.
Type in the collection of the Geological Survey, Wellington.*
Note.—On the card accompanying a specimen it is recorded as “Dosinia sp. Age 4 to 6. Locality No. 257. Kawau Island.” In addition to the two complete specimens there is a large fragment with the valves partly united and showing the pallial line distant from the margin; also two smaller fragments of right valves, one of which clearly shows the small deeply inflexed area in front of the beak.
Miltha parki n. sp. (Plate XVII, fig. 3.)
Shell large and solid, ovately subrotund, compressed, the left valve more compressed than the right; beaks prominent, curved forward, nearer to the anterior end; excavate in front of the beak with the margin sharply inflexed, thence rounded, the end subangled on meeting the ventral curve; the posterior dorsal margin convex and declining somewhat sharply, the end apparently slightly angled. The posterior dorsal area faintly indicated. Sculpture consists of fine concentric and radiate threads of about equal strength, producing minute granules. All examples have the valves united and are filled with a hard matrix; no description of the interior can therefore be given.
Height, 77 mm.; length, 75 mm.; thickness of the united valves, 25 mm.; the diameter of the right valve about one-third greater than that of the left. Other examples: height, 70 mm.; length, 70 mm. Another: height, 64 mm.; length, 62 mm.
Type and co-types in the collection of the Geological Survey, Wellington.
Locality: No. 526, Okoko—Waipa—Kawhia Road.
The specimens were collected by Professor Park and listed as Dosinia sp. (Geol. Rep., vol. 17, p. 139, 1885).
Note.—The three species of Miltha described may be distinguished from each other by the following characters:—M. parki, by the prominence of the beaks and the radial sculpture: M. neozelanica, by the anterior position of the beaks and their marked forward curve; in large specimens the
[Footnote] * Fig. 2A is from the right valve of the type, prepared by Mr. J. Marwick.

height is greater than the width and the marginal angles obsolete, though in medium-sized individuals the angles are very distinct; the left valve also is invariably much more compressed than the right: and M. dosiniformis by the submedian position of the beak, the more equal slope of the dorsal margins, and the more circular marginal contour. The two species are nearly allied, and closely approach Phacoides (Miltha) sanctaecrucis Arnold (U.S. Geol. Sur. Bull. 396, pp. 57–58, pl. vi, fig. 6, 1919) from the Coalinga District, California, recorded from Lower to Upper Miocene and perhaps Lower Pliocene.
A fragment of a Miltha was obtained by Dr. Thomson from the Mount Donald beds. It is too small to determine definitely, but is certainly very near to M. neozelanica.
A species of Miltha has recently (1919) been described by M. Doello-Jurado from the Tertiary beds of the Argentine in the Entrerienne formation, classed by von Ihering in the Miocene period.
Couthouyia concinna n. sp. (Plate XVIII, fig. 1.)
Shell minute, fusiform; whorls six, rounded and somewhat abruptly contracted at the sutures, apex minute, the two following whorls with fine spiral and axial threadlets, thence the axial riblets prominent, narrower than the interspaces, in places somewhat irregular and wrinkled, the spiral striae very indistinct, Aperture ovate, outer lip almost uniformly curved, basal lip very slightly produced; columella slightly curved, projecting, and with a small groove separating it from the body-whorl except on the upper third where the peristome is closely united.
Length, 2.6 mm.; width, 1.5 mm.
Type to be presented to the Wanganui Museum.
Locality: Target Gully. Collected by Marshall.
There is a single example only; it is near to the Recent species C. corrugata Hedley.
Vermicularia ophiodes n. sp. (Plate XVIII, fig. 2.)
Shell small, apparently solitary, of about seven or eight volutions, which are irregularly and obliquely spirally coiled and attached, with the exception of about one-third of the last coil, which is free and projecting; the apical whorl is broken and there appear to be internal septa, but there is no indication of septa in the terminal free portion; the sutures undulating and in places deep; the dorsal surface of the coils except the last with small somewhat irregularly-rounded pustules, frequently perforate, and between these irregularly granose. Viewed from the base the last coil produces a deep and rather elongated umbilicus, the sculpture is small undulating longitudinal threads, somewhat irregular and distinctly granular in places; the aperture subcircular.
Greatest diameter of shell, 15 mm.; greatest diameter of aperture, 4 mm.
Locality: Target Gully. Collected by Marshall.
Type to be presented to the Wanganui Museum.
Cymatium suteri n. sp. (Plate XVIII, figs. 3, 4.)
Shell small, fusiform, aperture and canal shorter than the spire; whorls six or seven, somewhat rounded, sutures impressed not deep, canal short;

sculpture consists of axial and spiral cords forming nodules on the crossings; they are equal to or rather wider than the interspaces; on the body-whorl the axials are more distant and less marked especially towards the lip, there are about thirteen on the penultimate whorl, growth-striae are well marked in places and there are several prominent varices; of the spiral cords there are six or seven on the penultimate whorl and fourteen or fifteen on the last, with an occasional minute thread in the grooves, those on the base and canal smaller and crowded, on each whorl the two spirals immediately below the sutures are small and close together. Aperture ovate, slightly oblique, the outer lip with a stout varex, somewhat expanded and with several stout elongated denticles; columella almost straight, smooth, with a stout callus narrowing to the end of the beak, which is slightly twisted.
Length, 13 mm.; width, 6 mm.; length of aperture and canal measured on the angle, 7 mm.
Locality: Waikopiro.
Type in the Wanganui Museum.
This small species came to light in the Suter collection. It is labelled by him “n. sp.,” and it is only one of many with which he was unable to deal.
Cymatium pahiense n. sp. (Plate XVIII, fig. 5.)
The specimen is embedded in sandy clay, and the front only is visible.
Shell of medium size, stout, shortly fusiform, aperture longer than the spire; whorls about five or six, the last large and narrowed to the short anterior canal; apex missing, the lower spire-whorls convex, lightly angled above; sutures impressed, apparently not deep; the body-whorl with a prominent varex to the left of the aperture. Sculpture consists of axial and spiral cords, the latter more pronounced and forming rows of small nodules, the separating grooves in width about equal to the cords; on the penultimate whorl there are apparently four or five spiral cords. Aperture slightly oblique and somewhat narrow, the outer lip widely expanded, thick and with ten to a dozen stout lamellae, which curve into the aperture; inner lip with a broadly expanded thin callus not obscuring the spiral sculpture; the columella almost straight, a few small lamellae at the anterior end, four stout rounded plates on the middle area, and immediately above these narrowly and rather deeply excavated, thence curving outward to the lip with the nodular spiral cords continuing into the aperture.
Length, 40 mm.; width, 23 mm.; length of aperture and canal, 25 mm.
Type to be presented to the Wanganui Museum.
Locality: Pahi. Collected by Marshall.
The apical whorls are missing, and therefore the proportional length of the aperture and canal to the total length is not as great as the measurements given above would indicate. It is a somewhat peculiar form, and placing it in Cymatium is not altogether satisfactory.
Cypraea sp. (Plate XVIII, fig. 6.)
Specimen very fragmentary. Spire concealed, aperture narrow above and strongly curved, outer lip thickened and extending above the spire, the margin incurved and dentate, inner lip with strong transverse teeth on the posterior area and perhaps continued to the anterior end.

Length, approximately 30 mm.; width, approximately 20 mm.
Locality: Pahi. Collected by Marshall.
Appears to be distinct from other species recorded from our Tertiaries, but is too fragmentary to determine definitely. The specimen to be lodged in the Wanganui Museum.
Admete maorium n. sp. (Plate XVIII, figs. 7, 8.)
Shell small, shortly fusiform, spire short; whorls five or six, prominently shouldered, apical whorls smooth and rounded; sutures somewhat impressed. Sculptured with stout axial and spiral cords forming small nodules on the crossings, both distinctly narrower than the interspaces, the axials are the more distant and becoming more or less obsolete on the base, there are twelve on the last whorl; of the spiral cords there are two on the spire-whorls and eight on the last, the lower five small, gradually diminishing anteriorly, of the three prominent cords the second and third are the more widely spaced. Aperture ovate, slightly oblique, outer lip imperfect, the margin no doubt crenulated; columella almost straight, slightly twisted at the extremity, narrowly but strongly callused, and with three strong evenly spaced plates on the anterior half.
Longth, 8.5 mm.; width, 5 mm.
Locality: Target Gully. Collected by Marshall.
Type to be presented to the Wanganui Museum.
Allied to A. suteri Marshall and Murdoch, but differs in the stronger sculpture, less number of axial cords, and the position of the plates on the columella.
Daphnella varicostata n. sp. (Plate XIX, fig. 1.)
Shell small, fusiform; spire lightly turreted, its length nearly equalling the aperture and canal; sutures somewhat impressed, narrowly margined below, usually more distinct on the higher whorls; whorls eight, the third and succeeding whorls convex, rising rather abruptly at the sutures, the last produced and gradually contracted to the beak; protoconch smooth; apex minute, whorls gradually increasing, thence with axial and spiral sculpture, the axials very irregular, close and distinctly raised, or almost obsolete in places, or broad and lightly rounded, usually feeble on the body, and the lines of growth well marked; the spirals small and variable, the grooves narrow, more strongly marked towards the beak; there are eight or nine spirals on the penultimate whorl. Aperture narrow, outer lip with sharp margin, the posterior sinus small, situated immediately below the suture, distinctly marked by the growth-striae; columella lightly curved, the anterior end slightly deflected to the left, thinly callused, and with small oblique threadlets corresponding with the adjacent spirals; canal short and fairly wide.
Length, 15 mm.; width, 6.25 mm.
Locality: Awamoa. Collected by Marshall.
Type and co-types to be presented to the Wanganui Museum.
There are three examples each varying slightly in the axial sculpture. With these is another example having very minute close spiral lines, the axials very feeble, almost suppressed, the sutures apparently not margined, and the protoconch increasing in girth more rapidly. The two latter characters are of some importance, but meantime it appears better to record the form “var. A.”

Euthria subcallimorpha n. sp. (Plate XIX, figs. 2, 3.)
Shell small, fusiform; spire equal to or slightly longer than the aperture; sutures impressed, fairly deep; whorls five, the apex missing, convex, the last rounded at the periphery, thence gradually contracted to the canal; sculpture—there are eight low rounded axials, more pronounced on the spire-whorls, feeble on the base of the last and vanishing towards the canal, they are rather narrower than the interspaces; the spirals consist of fine close incised lines, forming lightly raised threadlets on the upper spire-whorls, and with five or six on the canal more prominent. Aperture ovate, slightly oblique, narrowed above, below produced into a short open canal; outer lip sharp and with a number of small denticles within the margin, columella almost vertical, slightly callused, smooth, beak slightly twisted to the left.
Length, 12 mm.; width, 5.5 mm.; length of aperture and canal measured on the angle, 6 mm.
Locality: Target Gully. Collected by Marshall.
Type to be presented to the Wanganui Museum.
The only example has the axial ribs somewhat rubbed. It may be distinguished from callimorpha by the absence of the keel on the spire-whorls, the shoulder not excavated, the finer spiral sculpture, and somewhat longer canal.
Hemifusus (Mayeria) goniodes Suter.
N.Z. Geol. Surv. Pal. Bull. No. 5, p. 23, pl. 3, figs. 15, 16.
Two examples of this species were obtained at Pahi and agree well with Suter's description. The keel on the spire-whorls is well below the middle, the shoulder sloping and concave, the sutures somewhat impressed, sub-margined below and with a few small spiral threads, the spiral sculpture is distinctly developed on the anterior end only; growth-lines are somewhat prominent and appear to indicate a broad shallow sinus on the shoulder. It appears doubtful if the genus Hemifusus is best suited for the species, but better material is necessary to settle the question.
Length (imperfect specimen), 63 mm.; width, 27 mm.
Locality: Pahi. Collected by Marshall.
Eulimella awamoaensis n. sp. (Plate XIX, fig. 4.)
Shell small, subulate, straight, and polished; aperture about one-third of the total length; sutures distinctly channelled; whorls eight; the apex of the protoconch broken, it is apparently oblique; whorls flattened, narrowly subangled a little below the sutures, most marked on the higher whorls, the last narrowly curved on the periphery and convex below; sculpture consists of a number of irregularly-disposed feeble axial riblets, spiral striae very indistinct; aperture narrow above, outer lip straight, columella rounded, narrow and straight, basal lip imperfect, apparently somewhat produced.
Length, 7 mm.; width, 2.25 mm.; length of aperture, 2 mm.
Locality: Awamoa. Collected by Marshall.
Type to be presented to the Wanganui Museum.
Note.—In general form the species is near to E. limbata Suter.
Odostomia (Pyrgulina) pseudorugata n. sp. (Plate XIX, fig. 5.)
Shell small, elongated, narrowly turreted; whorls seven, protoconch smooth, heterostrophe, nucleus lateral, succeeding whorls slightly convex,

subangled a little below the sutures, the latter deeply impressed. Sculpture consists of about seventeen rounded and slightly inclined-forward axial ribs, extending across the base and rather narrower than the interspaces; these are crossed by fine spiral threads which form minute granules on the crossings, a stronger and more distinctly nodular cord on the subangle and a similar cord margining the sutures; there are about five spirals on the penultimate whorl. Aperture imperfect (outer lip broken), columella nearly vertical, callused and with a stout plate above the middle.
Length, 3 mm.: width, 1 mm. Aperture slightly more than one-third of the total length.
Locality: Target Gully. Collected by Marshall.
Type to be presented to the Wanganui Museum.
Closely allied to O. rugata Hutton, from which it differs in its narrower form, slight but distinct nodular angle below the sutures, and the absence of a pronounced cord on the base; in O. rugata the basal cord is apparently always present, although the axials are frequently extended below it.
Turbonilla awamoaensis n. sp. (Plate XIX, fig. 6.)
Shell small, subulate, whorls ten, protoconch missing, flattened or slightly concave below the sutures, thence convex; sutures slightly impressed and, on the lower whorls, with one or two fine spiral threads above; whorls strongly axially ribbed, about fourteen ribs on the penultimate, including an occasional broader varex, the axials narrower than the interspaces, slightly flexuous and with a subnodular appearance immediately below the sutures, absent on the base; the last with a number of small undulating spiral threadlets towards the base, obsolete on approaching the columella; aperture oval, the basal lip slightly effuse, columella slightly curved, narrowly and stoutly callused.
Length, 10 mm.; width, 2.75 mm.
Locality: Awamoa. Collected by Marshall.
Type to be presented to the Wanganui Museum.
The sculpture readily distinguishes it from our other Tertiary forms.
Eulima aoteaensis n. sp. (Plate XIX, fig. 7.)
Shell small, subulate, straight, and highly polished; varices very indistinct, without sculpture excepting the microscopic growth-lines; whorls eight or nine, almost flat, the sutures oblique and very lightly impressed; the aperture about one-third of total length; the apical whorl missing, the next a little more rounded than the succeeding whorls, the last narrowing and slightly produced at the anterior end; aperture slightly oblique, very narrow above, lip almost straight, base rounded and slightly effuse; the columella almost straight, with a well-defined callus slightly spreading on the middle area and narrowing to the anterior end.
Length, 6.5 mm.; width, 1.25 mm.; length of aperture, 2 mm.
Locality: Target Gully. Collected by Marshall.
Type to be presented to the Wanganui Museum.
This species had been submitted to Suter, and is labelled by him “Eulima n. sp.” The form of the aperture, together with the length of the last whorl, appears to distinguish it from other New Zealand species.

Art. XI.—Fossils from the Paparoa Rapids, on the Wanganui River.
[Read before the Wanganui Philosophical Society, 25th October, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
No complete collection of fossils has yet been recorded from the strata that crop out along the course of the Wanganui River. For the most part the strata contain but few fossils, and in those localities where organic remains are abundant the material in which they are embedded is pebbly, or it has a concretionary nature, which makes it difficult to extract the fossils in a condition that allows of exact identification. The most promising locality that is known at present is probably that of the Paparoa Rapids, some twenty miles below Taumarunui. Park* was the first geologist to make any collections here, and he recognized some thirty species, the nature of which seemed to show that the strata were of a distinctly lower horizon than any that he found on the coast between Wanganui and Patea. A visit was paid by one of us to the locality in January, 1920, with the object of making as complete a collection as time and circumstances would allow. Two days were spent there, but the collection that was made did not contain a very large number of species. At the Paparoa Rapids the strata on the right bank of the river are almost horizontal, but on the left bank they have been disturbed by an extensive slip, and have locally a high easterly dip. The fossil-bearing rock is a fine, hard, bluish-grey sandstone, slightly concretionary in its nature, and large fossil shells are very conspicuous in it. The actual material of the sands is such as might well be derived from the rocks of Maitai age, of which the main mountain-ranges of the North Island are composed.
The following is a list of the species which were collected, the Recent species being marked with an asterisk.
-
Ancilla sp.; apex only
-
*Calyptraea novae-zelandiae Less.
-
Chione acuminata Hutt.
-
*Chione yatei (Gray)
-
Cominella aff. intermedia Sut.
-
Conus sp.; a fragment only
-
Corbula pumila Hutt.
-
Crassatellites attenuatus (Hutt.)
-
Crassatellites trailli (Hutt.)
-
Crepidula gregaria Sow.
-
Cucullaea worthingtoni Hutt.
-
Cytherea ensyi Hutt.
-
Dentalium solidum Hutt.
-
*Divaricella cumingi (Ad. & Ang.)
-
*Dosinia anus (Phil.)
-
*Dosinia subrosea (Gray)
-
Epitonium lyratum (Zitt.)
-
Glycymeris cordata (Hutt.)
-
Glycymeris subglobosa Sut.
-
Limopsis zitteli Iher.
-
Luponia aff. ovulatella Tate
-
*Mactra scalpellum Reeve
-
Natica (Polinices) gibbosus Hutt
-
Panope worthingtoni Hutt.
-
Paphia curta (Hutt.)
-
*Pecten convexus Q. & G.
-
Pecten huttoni (Park)
-
Struthiolaria cincta Hutt.
-
Surcula aff. fusiformis (Hutt.)
-
Turbo aff. superbus Zitt.
-
Turritella semiconcava Sut.
-
Verconella nodosa var.; not Recent
-
Verconella aff. dilatata; fragment only
-
Voluta sp.; not Recent
[Footnote] * J. Park, Rep. Geol. Explor. during 1886–87, p. 173, 1887.

There are only thirty-four species in this list, and many of them are represented by fragmentary material only, or they are filled with a hard and tough matrix. The hinge-teeth and apertures of many of the species are obscured, and this makes the identification a little uncertain. Only seven of the species are certainly Recent, and the percentage of Recent species therefore falls as low as 21. The small size of the collection, the fact that large species only were in a condition to be collected, and the uncertainty of identification in some cases make it unsafe to rely too closely on this percentage in correlating the strata with those of other localities in New Zealand.
The nature of the mollusca points rather to the Target Gully horizon, for there are only six species that do not occur there, and these species are found in horizons of much the same position near Oamaru or in the Trelissick Basin. On the other hand, the fauna of this stratum is of a distinctly older type than that of any of the coastal localities of the district in which we have collected fossils up to the present time.
Art. XII.—Tertiary Rocks near Hawera.
[Read before the Wanganui Philosophical Society, 25th October, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
In the last volume of the Transactions of the New Zealand Institute we published lists of fossils from various localities on the coast-line to the north-west of Wanganui. During the past year we have been able to make collections on the beach at Hawera, some twenty miles farther along the coast in the north-west direction. Throughout this distance the rocks are of the same general nature as they are near Wanganui—in other words, micaceous sands and clays (the papa rock). If anything, the material is rather more sandy on the average than it is farther south. There is perhaps rather less mica, and black grains are rather more numerous among the quartz-grains. The strike of the strata changes a good deal. As stated in our former paper, the strike between Castlecliff and Nukumaru is, on the average, 70°. By the time Patea is reached it is as much as 100°, and still farther north, at the mouth of the Tangahoe Stream, on the coast opposite Mokoia, it is 145°. This shows clearly that there is a gradual swing in the strike as one proceeds to the north-west. The dip is always to the south-west and is always slight, and has an average of about 4°.
The direction of the strike and dip as related to that of the coast is such that older and older beds are exposed as one journeys north until the mouth of the Tangahoe is reached. At this point the trend of the coast is parallel to the strike of the strata, and as one goes still farther north younger and younger strata again begin to make their appearance. About 500 ft. of strata separate the lowest horizon three miles north of Waipipi from the horizon at the mouth of the Tangahoe Stream. The Waihi beach

is five miles to the north of the mouth of the Tangahoe, and the horizon exposed on the beach at that point is about 100 ft. higher than the lowest horizon at the Tangahoe mouth, and is therefore 400 ft. lower than the Waipipi horizon, or, in other words, 4,200 ft. below the highest beds at Castlecliff.
The great regularity of the stiatification which is so noticeable to the south-east of Waipipi is just as noticeable in the strata exposed along the coast-line to the north-west of that place. There is no unconformity as far as our observations went, and there is no evidence of a stratigraphical disconformity. The similarity, too, of the molluscan faunas in the localities that have been mentioned is also so great as to show clearly that there is a palaeontological continuity.
Fossils from Hawera.
-
Ancilla depressa (Sow.)
-
Anomia huttoni Sut.
-
Arca novae-zelandiae E. A. Smith
-
Atrina zelandica (Gray)
-
Calliostoma pellucidum (Val.)
-
Calliostoma selectum (Chemn.)
-
Calyptraea novae-zelandiae var. inflata (Hutt.)
-
*Cardium spatiosum Hutt.
-
*Chione chiloensis Phil.
-
*Chione chiloensis var. truncata Sut.
-
Chione mesodesma (Q. & G.)
-
Chione yatei (Gray)
-
*Crassatellites aff. trailli (Hutt.)
-
*Crepidula gregaria Sow.
-
Crepidula monoxyla (Less.)
-
Cytherea oblonga (Hanley)
-
*Dentalium pareorense Pilsbry and Sharp
-
*Dentalium solidum Hutt.
-
Divaricella cumingi (Ad. & Ang.)
-
Dosinia lambata (Gould)
-
Dosinia subrosea (Gray)
-
*Fulgoraria morgani Marshall and Murdoch
-
*Fulgoraria sp.; not Recent
-
*Fusinus aff. spiralis aff. dentatus (Hutt.)
-
Glycymeris laticostata (Q. & G.)
-
*Glycymeris subglobosa Sut.
-
*Lima waipipiensis Marshall and Murdoch
-
*Lucinida levifoliata Marshall and Murdoch
-
Macoma edgari Iredale
-
Macrocallista multistriata (Sow.)
-
Mactra scalpellum Reeve
-
*Melina zealandica Sut.
-
*Miltha zelandiae Marshall and Murdoch
-
*Natica ovata Hutt.
-
*Natica sagena (Sut.)
-
Nuculana bellula (A. Ad.)
-
*Olivella neozelanica (Hutt.)
-
Ostrea angasi Sow.
-
Ostrea cucullata Born = corrugata Hutt
-
*Ostrea ingens Zitt.
-
Panope zelandica Q. & G.
-
*Paphia curta (Hutt.)
-
*Pecten semiplicatus Hutt.
-
*Pecten triphooki Zitt.
-
Pecten zelandiae Gray
-
*Phalium fibratum Marshall and Murdoch
-
Protocardia pulchella (Gray)
-
Psammobia stangeri Gray
-
*Struthiolaria canaliculata Zitt.
-
*Struthiolaria zelandiae Marshall and Murdoch
-
Struthiolaria aff. papulosa (Mart.)
-
Thais aff. lacunosa (Brug.)
-
Turritella carlottae Watson
-
Turritella rosea Q. & G.
-
Turritella symmetrica Hutt.
-
Venericardia purpurata (Desh.)
-
Venericardia unidentata (Basterot)
-
Verconella dilatata (Q. & G.)
-
Verconella mandarina (Duclos)
-
Verconella nodosa (Mart.)
-
Zenatia acinaces (Q. & G.)
The species marked with an asterisk are extinct. There are sixty-one species in this list, of which twenty-five are extinct: thus the percentage of extinct species in 41.

Our examination of the coast-line between Wanganui and the Waingongoro has now proceeded far enough to allow us to discuss various geological theories in the light of the facts that have so far been disclosed. We have now traversed the coast-line for nearly the whole distance of fifty miles, and the following opinions appear to us to be well established:—
| (1.) |
The series of rocks represents a period of continuous marine deposition. |
| (2.) |
The climate during this period of deposition was at no time colder than at the present, but, on the other hand, during the greater part of the time conditions were distinctly more genial. |
| (3.) |
There is no evidence of any sudden addition to the marine molluscan fauna whilst the deposition was in progress. |
(1.) The first of these opinions has to be supported from the palaeonto-logical, stratigraphical, and lithological facts that have been observed. From the palaeontological standpoint the evidence at first sight seems to be in favour of a decided break between the faunas of the two extremes—Castlecliff and Whakino. So greatly do the faunas in these two localities differ from one another that any geologist who saw the Castlecliff fauna at one time and that of Whakino—Waihi near Hawera at another, without examining any of the intermediate localities, would unhesitatingly come to the opinion that they represented different geological periods. It is, of course, true that several identical species occur in the two localities; but it is also true that the dominant species in the one locality are either absent from the fauna of the other or are there reduced to an insignificant proportion. Collections that have been made at intervening points, from two of which we have already published lists, show, however, a clear connection between the two divergent faunas. We have found no locality where the change in the faunas is so marked as to prove that there is a break in the palaeontological succession. The locality that we have found to be most suggestive of such a break is at a point three-quarters of a mile to the south of the Nukumaru boat-landing. Here we have found the last specimens of Melina zealandica, Lutraria solida, Cytherea enysi, Lucinida levifoliata, Mesodesma crassa, and Struthiolaria frazeri. These species, however, do not all disappear at the same horizon, but in a thickness of rock that measures about 100 ft. There is also the additional fact that the horizon in which all these species occur contains also as many as 76 per cent. of Recent species, and the fauna is clearly related in the most definite manner to that in the series of rocks that lies above it. For these reasons we do not regard this horizon as indicating in any sense a palaeontological break. On the other hand, there must be a most definite reason for the important faunal change which is so conspicuous at this horizon. It is our belief that this change is due to climatic conditions, or, at any rate, to a most important change in the temperature of the ocean-water which washed these shores at that time. The species that continued to exist after this time were, however, as varied, and indicate a temperature of sea-water at least as high as that of the present Cook Strait. We are inclined to think—though on this point there is room for much divergent opinion—that, on the one hand, the Waipipi series and the Whakino series contain a fauna that is, from the percentage of Recent species, and from the very nature of the fauna, perhaps equivalent to the Upper Miocene of Europe; but since it is probable that in an isolated country like New Zealand faunal change was relatively slow, it is undesirable, at the present time at least, to place much reliance

on any such correlation. On the other hand, the Castlecliff series contains a fauna with such a high percentage of Recent species that it is in all probability more or less equivalent to the Upper Pliocene of Europe. While we think that the extreme faunas show as great a difference as is indicated by these periods, we also think that, divergent as they are, a complete transition occurs in the strata between them from the one fauna to the other.
This opinion as to the continuity of the rock-series is also strongly supported by stratigraphical evidence, which may be summarized under three heads:—
(a.) We can nowhere find an important stratigraphical break in the line of cliffs, which is almost continuous throughout the distance. There is, of course, a great deal of irregularity in the stratification, due to tidal scour and to current-bedding, but the cause and nature of this is at once apparent. The only place where we have found anything more important is at a locality about two miles and a half to the north of Kai Iwi. In this place, as mentioned in a previous paper, there is clearly an old land-surface, which is indicated by a thin deposit of beach-worn pebbles, a layer of carbonaceous matter, strata penetrated by roots, and borings of littoral mollusca. On the other hand, this structure is not associated with any distinct change in the species of mollusca, and it must, in our opinion, be regarded as due to a merely temporary and local emergence of a coastline that was otherwise undergoing a submergence about as rapid as the accumulation of sediment for a long period of time.
(b.) We have found no sudden change of dip and strike that has extended through a thickness of more than 100 ft. of sediment. Throughout the strata that are exposed on the coast-line the strike and dip are remarkably constant. The strike swings round gradually from 85° at Castlecliff to 125° near Whakino, but, except for a few local variations, there is no sudden change. Perhaps the most marked of these sudden variations is that which occurs at the mouth of the Waipipi Stream, but in a few hundred yards along the beach the normal strike is restored.
(c.) Lithologically the sediments are very similar throughout. In those few localities where there are embedded pebbles they are always fragments of submetamorphic rocks of the nature of greywackes. Where the sediments are of a finer nature they are always bluish-grey in colour, and contain a great abundance of quartz and of muscovite mica. The lithological nature of this fine sediment is so similar throughout that there is little doubt that it has all been derived from one and the same source. This conclusion points to the probability that the sediments were all deposited while the areas of land and sea remained approximately the same, and consequently there is a presumption that all the sediments were deposited during the same geological period.
It may therefore be taken as a fact that palaeontological, stratigraphical, and lithological evidence alike support the belief that the series of rocks exposed on the coast-line between Wanganui and Hawera represents a period of continuous sedimentation which in New Zealand geology may be said to belong to the upper part of that great geological system which we, by somewhat extending the classification of Captain Hutton, have called the Oamaru system. We are of opinion that the Wanganui system must now be regarded as having lost its individuality, and that it must in future be looked upon as the upper strata of the great Oamaru system. We consider it possible that the period of deposition of these rocks extended

over the period that in Europe elapsed between the Upper Miocene and the Upper Pliocene, though we do not wish to insist upon this correlation. It appears to us that under the peculiar conditions in New Zealand which necessarily resulted from the prolonged isolation of this small land the rate of organic change, so far as it is shown in the marine mollusca, does not give a very satisfactory basis for the correlation of the New Zealand sediments with those of Europe, so far at least as the Tertiary rocks are concerned.
(2.) Climate: If it be accepted that the continuity of the strata in the Wanganui coast is as precise as has been described, it at once becomes evident that climatic conditions in New Zealand have been warm or mild during the whole period of time that was occupied in the deposition of the sediment. It has also been suggested that this lapse of time is more or less equivalent to the interval between the Upper Miocene and the Upper Pliocene in Europe. Whether this is the case or not, it may be taken as certain that the period called by Hutton the “older Pliocene” is comprehended in this interval. All who have studied New Zealand geology are aware that Hutton was of opinion that the great extension of the glaciers of New Zealand occurred during this Upper Pliocene. We hold that the evidence which we have been able to bring together shows conclusively that the climate of New Zealand during this Upper Pliocene period was at the least as genial as it is now, and that there can have been no glacial extension relative to the present sea-level during that period. There is, on the other hand, much evidence that the warm climate of the early Tertiary has become a good deal colder during the late Tertiary in this country. At least three genera which indicate warm conditions—Melina, Olivella, and Miltha—have now disappeared. In many other genera species of large size have been replaced by others of much smaller dimensions. Large species of Melina are at present restricted to the warmer tropical waters, and it may well be held that Olivella and the large species of Miltha indicate the prevalence of warm climatic conditions. This conclusion is enforced by the occurrence of large species of Cardium, Cytherea, Pecten, Ostrea, Paphia, Natica, and Dentalium. It becomes evident that climatic conditions in New Zealand between the Upper Pliocene and the Upper Miocene, so far as these periods can be judged by the nature of the marine mollusca now exposed on the cliffs of the north coast of Cook Strait, were never colder than now, and during the greater part of that time they were a great deal more genial. There is also evidence that during at least the earlier portion of this interval the climate was a great deal warmer than it is at the present day.
(3.) Change in fauna: We regard it as a fact that during the long period of time that is represented by these sediments there has been no sudden appearance of a new fauna. Everywhere the fauna contained in each separate stratum may reasonably be regarded as the lineal descendant of that in lower strata, though in each stratum there are perhaps a few species or genera that are found sparingly elsewhere. In no case, however, is there such a change as to justify the opinion that a foreign element has been introduced into the previous fauna. This idea of the continuity of the marine molluscan fauna of the younger Tertiary rocks of New Zealand may be carried a little further, for it is a fact that the fauna of the highest beds that are exposed differs but slightly from the marine molluscan fauna of the present day. It is certainly a fact that no additional foreign element distinguishes the Recent fauna from that which is contained in the Castlecliff beds.

It has frequently been remarked before by one of us when speaking of the molluscan fauna of the earlier portion of the Oamaru system—notably that of Target Gully—that it was distinctly richer than that of the present day. It is hardly correct to make this statement in speaking of any comparison between the fauna of the Waipipi series and that of the Castlecliff series. The fauna that has been collected from the former locality up to the present time is not very extensive, and it is notably wanting in the smaller species. These facts effectively prevent a complete comparison being made. It can, however, be safely said that, while the Castlecliff fauna contains a large number of species that are not found at Waipipi, most of these additional species have been found elsewhere in Tertiary rocks of greater age than those of the Waipipi series.
During the time that elapsed between the Waipipi and the Castlecliff periods of deposition, perhaps Upper Miocene to Upper Pliocene, a period elsewhere estimated as equal to a lapse of 690,000 years, an important change took place in the fauna. This change was not the result of the introduction or addition of new species or of new genera, but was due to the extinction of some genera which had been of importance up to the middle of the period, and of numerous species that had given a definite character to the earlier fauna.
As has already been remarked, the molluscan fauna of the Castlecliff series differs in few respects from the Recent fauna. It is probable that the difference is even less than a comparison of the lists would suggest, for the Castlecliff beds were deposited at a depth that approached 100 fathoms, and we have at present an incomplete knowledge of the fauna of the New Zealand sea-floor at that depth. Dredgings that were made outside the Great Barrier in 1904 brought to light several species that had previously been collected in the Castlecliff series, and had been thought to be extinct. From our work on the mollusca of the beds on the Wanganui coast-line we consider that we have a knowledge of at least the main features of the New Zealand marine mollusca from the Upper Miocene to the present day. Such a knowledge must shed an important light on theories that have been advanced in regard to the relations or land connections between New Zealand and other countries during this lapse of time. A number of eminent authorities have written on this subject, but at the present moment we wish to restrict ourselves to those who have made specific statements in regard to these land connections during the period with which we have dealt—namely, from the Upper Miocene to the present day. Hutton* has definitely stated that during the older Pliocene New Zealand was in direct communication with New Gumea. The statement is based mainly on the occurrence of Diflodon aucklandicus in lignite-beds at the Dunstan, in Otago, a species which is said by Hutton to have its nearest ally in New Guinea. We consider it to be impossible that a continental extension of such a magnitude should have occurred without having the greatest effect on the molluscan fauna of New Zealand at that time, and of this we have not been able to find any trace. Marshall† has stated that the great Pleistocene elevation connected New Zealand with some of the northern tropical islands, and provided also a shallow-water connection with Antarctica. This statement was based on older opinions of Hutton. It is sufficient
[Footnote] * F. W. Hutton, Index Faunae Novae Zealandiae, p. 18, Dulau and Co., 1904.
[Footnote] † P. Marshall, New Zealand and Adjacent Islands, p. 49, Carl Winter, Heidelberg, 1912.

to say that a comparison of the mollusca of the Castlecliff beds with the Recent mollusca shows definitely that New Zealand did not at that time receive additions of any importance whatever to its marine molluscan fauna, and therefore that any extension of the area of New Zealand at that time did not in any way impair its isolation.
Park* has stated that during the Pleistocene the area of New Zealand was many times greater than now, that the whole of the South Island and most of the North Island was glaciated, and in a map he shows the land extending to New Caledonia The general similarity between the fauna of the Castlecliff beds and the Recent fauna goes far to disprove the idea of glaciation of this district, while there is no evidence known to us, so far as the mollusca are concerned, that would show a Pleistocene extension of New Zealand to New Caledonia. Hutton in various other publications urged not only that New Zealand was greatly extended during the early Pliocene, but also that it was heavily glaciated at that time. It is probable that in the rock-series that we have described the Nukumaru series is about the age of the early Pliocene. In these beds we have at once a proof that this part of New Zealand was not elevated at that time, and we also have distinct proof that the climate was no colder, but was probably a good deal warmer than at the present day.
There are, however, clear proofs that New Zealand, or at least this part of the country, was considerably elevated at the close of the time of deposition of the Castlecliff beds. Two of these may be quoted. Artesian wells in the lower valley of the Wanganui River bed have reached a depth of 400 ft. without passing through the alluvial matter that the river has deposited. The valley of the Waingongoro River had a bed that extended to an unknown depth below the present sea-level, and had a width of about half a mile at the present beach-level. In addition to these facts, the strata of the series of rocks that has been described have all been elevated and eroded off to a uniform level before the next series of rocks was deposited. This upper rock-series rests in all cases unconformably on those that we have described, lying directly on the Whakino-Waihi beds in the extreme north of the district at which we have worked. The general occurrence of the sediments suggests that all the overlying beds were removed by erosion before these Pleistocene sediments were deposited. As to the precise age of this upper series of rocks we have at present no exact information. They frequently contain a large number of molluscan fossils at the base, but we have seen no extinct species of mollusca among them, and it is probable that they are approximately equivalent to the Pleistocene of Europe. Thomson has lately proposed to apply the name “Hawera series” to them. There is no particular objection to this, though the term “Pleistocene” has long been used in New Zealand, and it has not yet been shown that they are not a reasonable equivalent of the European Pleistocene.
It is perhaps advisable to recapitulate that after the Castlecliff series had been deposited there was a prolonged period of moderate elevation during which a great deal of erosion took place. Though this elevation was considerable, it was not great enough to bring the New Zealand area sufficiently close to any other country to allow of the introduction of any new features into the marine molluscan fauna of New Zealand.
The work that has been done in recent years on the fossil and Recent mollusca of New Zealand is now of sufficient amount and importance
[Footnote] * J. Park, Geology of New Zealand, p. 14, 1910.

to justify a consideration of the indications that they offer regarding the relations of New Zealand to other land areas in past time. It is evident that an accurate knowledge of the Recent fauna is of special importance when one is dealing with the main facts of the Tertiary geology of this country. Sir James Hector some forty years ago said, “An accurate knowledge of the affinities and distribution of the Recent shells of New Zealand is a very necessary element in the geological survey of this country.”* The application of this principle is as essential now as it was then. Hutton, in the Introduction of his Manual of 1880,† states that the better the fauna of New Zealand becomes known, the more prominently does it stand out as distinct from that of any other country, and this is particularly the case with its shells. Again, in his Introduction to the Index Faunae Novae Zealandiae,‡ he summarizes the elements of our fauna, points out the affinities with other faunal regions, and applies the test of geological evidence to indicate the time of their appearance in our area and the probable source from which they were derived. Hutton's review of our fauna, however much we may differ from many of his conclusions, does most distinctly emphasize its ancient character and the long period of isolation that is needed to account for many of its peculiarities.
Palaeontology in New Zealand has within recent years made a very considerable advance, more especially in our knowledge of the earlier Tertiary faunas, though there is still a rich field for further research. Enough, however, is now known to simplify many of the difficult problems that beset Hutton in 1904.
At the first view it may appear that our molluscan fauna contains a very considerable Australian element. According to Suter§ there are about 140 species common to both, a number that is about equal to one-eighth of the total species that he records. Recent investigations show that many of his determinations cannot be upheld, that others are very doubtful, and others again, such as Tonna, are really varietal and not strictly identical with the Australian species. But, admitting that there is a considerable number of species common to both, including the Cymatiidae, a group of large shells every New Zealand species of which occurs in Australian waters, it is not necessary to imagine a bridge across the Tasman Sea, or even to demand a close approach of the two land areas. The larvae of the marine mollusca are free-swimming creatures. In some species this stage in their life-history is brief, but in others it is of some length. Myriads of them are, of course, carried out to sea and perish, but when aided by ocean currents and other favourable conditions they are able to travel long distances. The southern portion of Australia, or at least Tasmania, may be said to lie in the region of the “roaring forties,” and the southern portion of the Tasman Sea is constantly swept for a portion of the year by hard and prolonged westerly gales, and with this aid from time to time some of the larvae would be certain to reach our shores. We might reasonably expect a larger and more important Australian element in our molluscan fauna than we actually have. It is obvious that very few of the species that survived the journey across the Tasman Sea would succeed in establishing themselves in the face of a new set of natural enemies, as well as changes in climatic and physical conditions. If the accession to our fauna had been
[Footnote] * In Hutton's Manual of the New Zealand Mollusca, Preface, p. iii, 1880.
[Footnote] † Ibid., p. ii.
[Footnote] ‡ F. W. Hutton, Index Faunae Novae Zealandiae, Introduction, pp. 13–19, 1904.
[Footnote] § H. Suter, Manual of the New Zealand Mollusca, pp. v, vi, 1913.

the result of a colonization across shallow water, or from a land close at hand, we should have expected to find a compact assembly, and not the more or less scattered fragments that are actually found.
Apart from the Australian element, the marine mollusca possess no characters suggestive of recent accessions from other faunal regions, for the Antarctic element is very largely a relic from older geological times.
The terrestrial and fresh-water mollusca require for their dispersal a close approach of lands, if not an actual land bridge. It is true that occasionally marine currents may bring some species to oceanic islands, but if these were introduced in some far-off period it would be extremely difficult, if not impossible, to be certain as to their origin.
Of the land mollusca which have been grouped under the Flammulinidae, Endodonta and Laoma comprise by far the greater number of our snails. They are ancient inhabitants and a primitive race. The geographic range of the group is almost world-wide, but palaeontology so far has found very little record of them. Pilsbry* remarks that “the Carboniferous of Nova Scotia has afforded a small helicoid which in form and sculpture can only be compared with such Endodontidae as Pyramidula or Charopa.” In support of our belief in the great antiquity of these helicoids, it may be pointed out that a number of genera appear to have developed in our area and are restricted to it, and that no New Zealand species has been recorded from any other faunal region. Of other groups, the Athoracophoridae may perhaps have been developed in our region. The Rhytidae, which include our large carnivorous snails, are of very ancient lineage. The operculate group is in great measure peculiar to our fauna. Hedley† remarks on this when he discussed the relation of the fauna and flora of Australia to that of New Zealand. Partly to account for the dispersal of Placostylus Hedley constructed his Melanesian Plateau.‡ If that land area or archipelago be granted a great antiquity it would appear to provide all the necessary communications even for the most primitive forms.
The groups of fresh-water mollusca are in perfect accord with the land mollusca. Gundlackia, Potamopyrgus, Lymnaea, Isidora, and Melanopsis are all of ancient lineage, while Diplodon is recorded from our Cretaceous beds at the Malvern Hills. Hedley,§ writing on the surviving refugees of ancient Antarctic life, discusses many interesting problems of distribution. He regards their advent as taking place by circuitous routes at wide intervals of time, and thinks that they are of great antiquity.
In our younger rocks the percentage of Recent species is very high, and in making comparisons between these we prefer to use the names of definite horizons where the species have actually been collected, rather than period-names, which may often involve incorrect correlation.
For the first of these we select the blue clays and sands of the coastal cliffs near Castlecliff. The fauna of these beds differs from the Recent fauna only in the presence of Ataxocerithium, and in the absence of a few obscure genera and a few groups whose habitat is between tide-level or in very shallow water. The total of extinct species is here not more than 7 per cent.
In the Kai Iwi beds, three-quarters of a mile south of the stream, the fauna presents no distinctive features from that at Castlecliff, except
[Footnote] * Manual of Conchology, vol. 9, p xxxix, 1894.
[Footnote] † Natural Science, vol. 3, p. 189, 1893.
[Footnote] ‡ Proc. Linn. Soc. N.S.W., vol. 7, ser. 2, pp. 337–39, 1893.
[Footnote] § Proc. Roy. Soc. N.S.W., vol. 29, pp 278–86, 1895.

perhaps a slightly higher percentage of extinct forms. Nukumaru beach, from the boat-landing to a point one mile to the south of it, has a fauna that shows a somewhat marked difference, not only in the greater percentage of extinct forms and in the occurrence of the genera Melina and Lutraria, but the assembly of species has changed notably. Some of the Recent species are in great abundance, others have distinctly decreased, and others are uniformly distributed; and in addition to this several are characterized by their unusually large size.
The Waipipi beds, from a quarter of a mile south of the stream to three miles to the north of it, show a still more marked change of fauna. In addition to the genera Melina and Lutraria, there are Crassatellites, Miltha, Cardium and Olivella, a difference in the assembly of Volutes, Dentalium, Pecten, and Struthiolaria. The abundance of the individuals of extinct species is somewhat pronounced as compared with the Recent, and the large species are in particular abundance.
The Whakino-Waihi beds, on the coast near Hawera, have a fauna closely similar to that of the Waipipi beds. The percentage of extinct species is only slightly greater, but there is a difference in the prominent species. Lutraria has not been found; Melina, Cardium, and Crassatellites are scarce, while Pecten, Natica and Dentalium, are in great abundance; Chione chiloensis is not uncommon. Of the Recent species, Atrina zelandica and Ostrea angasi are in great abundance.
It has already been pointed out that from Castlecliff to Waipipi there is an unbroken stratified series. We now extend that series to Waihi, and note that within its limits we see a most marked faunal change within a continuous series of deposits. Had it so happened that the beds that lie between the different horizons that are mentioned above had not been preserved, and that the several fragments had been so disturbed that stratigraphical evidence was practically valueless, palaeontology would then have been the only guide to their respective ages. It would have been evident that Castlecliff and Kai Iwi were essentially of the same age. The Nukumaru beds, on the other hand, might well have been regarded as a formation of a different period, and in the Waipipi strata the faunal change is so great that they would probably have been assigned a greater antiquity than they actually possess. On the other hand, the Whakino-Waihi beds are so similar in fauna to those at Waipipi that they would probably have been placed in the same horizon, whereas they are actually separated by several hundred feet of strata. The change in the fauna was slow between the Waihi-Whakino and Waipipi stages, and between the Kai Iwi and Castlecliff stages, but it was relatively rapid between the Waipipi and Nukumaru stages. This rapidity, we think, marks a great change in the physical or climatic conditions of the time.
It may fairly be claimed that there were no important accessions to the fauna during the Castlecliff to Whakino-Waihi period of deposition, for, as stated previously, the majority of the Recent genera are represented, and usually by Recent species, and the extinct species that occur in any abundance have already been recognized in earlier formations in New Zealand. Even genera such as Couthouyia, Ataxocerithium, and Melina occur at Target Gully, and a fragment of Miltha, perhaps similar to the Waipipi species, has been collected at Mount Donald.
While the Waihi beds are the lowest of the unbroken series of deposits on this coast, and while the palaeontology of the Tawhiti beds as recorded by Marshall, and the Ormond beds as recorded by Henderson and Ongley, indicate a fairly close relationship, we cannot claim that the one would

directly succeed the other. It is, however, perfectly clear that there is a far closer relationship between the Waihi and Tawhiti beds than between the Waihi and Castlecliff beds. The change from the Tawhiti to the Waihi beds does not in any way suggest that elements of a new fauna were introduced between these periods. On the other hand, the Tawhiti fauna is as closely related to the fauna of Target Gully as it is to the Waihi fauna. And, again, there is no indication of the introduction of new elements to the marine molluscan fauna during that interval of time.
The various lists that have now been published of the mollusca of many Tertiary horizons near Oamaru enable us to carry this review a little further. These lists appear to indicate a gradually changing fauna; nowhere does there seem to be an inrush of additional types. The genera that we have in our marine mollusca now were practically all present at the time that the Target Gully beds were deposited. The fauna of that time was certainly richer than the present one. The change that has taken place since then has been of the nature of reduction rather than of addition. We have, then, been forced to the conclusion that from the time the Wangaloa and Hampden beds were deposited until the present day the marine mollusca of New Zealand has shown a gradual development without any important additions at any time from other fauna regions. This, of course, implies that New Zealand has been completely isolated throughout this long interval of time.
The genera Murex and Trophon, that Hutton* refers to as having reached New Zealand from the Australian region in Pliocene time, have now been collected from Target Gully. The statement of Hutton that Typhis is of Eocene occurrence in Australia and Miocene in New Zealand needs revision, for the Australian Eocene is now generally classed as Miocene, while Typhis occurs as low as the Wharekuri beds in New Zealand. Further and more careful comparison of Australian and New Zealand specimens of Pectunculus laticostatus is necessary before any conclusions can be drawn from the time of appearance of the species in the Tertiary rocks of these countries. Dosinia greyi has been recorded from Wangaloa by Marshall. It is thus clear that the palaeontological proofs brought forward by Hutton in 1904 of a Tertiary land connection with Australia fall to the ground in the light of the fuller information that has since been acquired.
It has been frequently suggested that the resemblance between the Miocene fossils of South America and those of New Zealand is so great that it proves that those lands were either actually connected in the middle Tertiary or were separated by a narrow stretch of water only.† Accurate comparisons have shown that many of these identifications were inaccurate, and the number of species common to the two lands has now been reduced by Suter to six only. It is probable, however, that still further comparisons are required. It is, at any rate, noticeable that the six species referred to do not occur in the same Tertiary horizon in New Zealand, and that half of them occur in our lowest Tertiaries (Wangaloa and Hampden), which are probably equivalent to the Eocene of Europe. Recent work has shown that it is very noticeable that the Cretaceous fossils of Seymour Island are far more similar to the Cretaceous of New Zealand than the Tertiary fossils of the same locality are to those of this country. The Navidad and South Patagonian Tertiary fossils also are distinctly different from those of New Zealand.
[Footnote] * F. W. Hutton, Index Faunae Novae Zealandiae, Introduction, p. 18, 1904.
[Footnote] † C. Chilton, Subantarctic Islands of New Zealand, vol. 2, p. 805, Government Printer, Wellington, 1909.

Art. XIII.—Geology of the Waikato Heads District and the Kawa Unconformity.
[Read before the Auckland Institute, 15th December, 1920; received by Editor, 31st December, 1920; issued separately, 27th June, 1921.]
Plates XX, XXI.
| Introduction. |
| Previous Work in the District. |
| The Coastal Area between Manukau Entrance and Waikato River. |
| The Area East of the Sand-dunes. |
| A Suggestion of Origin of the Sand-dunes and of the Lignite-beds. |
| Sub-recent Oscillations of Level: Origin of Manukau Harbour. |
| Mutual Relations of the Areas North and South of the Waikato River: an Hypothesis of Major Faulting. |
| The Area South of the Waikato. |
| General Description. |
| Drainage of the Southern Area. |
| The Older-mass of the Southern Area. |
| The Marine Fossiliferous Shales or Belemnite-beds. |
| The Fossil-plant Beds. |
| Age of the Older-mass. |
| General History of the Coastal Area South of the Waikato River. |
| Relation between the Mesozoic Older-mass and the Younger-mass (or Notocene Beds. |
| The Younger-mass (or Notocene) Beds. |
| The Kawa Section. |
| Order of Ascending Sequence. |
| The Kawa Pumice-bed in Relation to the Waikato River. |
| Structural Plateau near the Coast. |
| Slipped Country above Waiwiri Beach. |
| Sinkholes. |
| Microscopic Characters of some of the Rocks: The Kawa Basalt; Waitangi Bay Basalt; Pakau Basalt; Algal Limestone; Glauconitic Limestone; Marly Limestone; Globigerina Limestone. |
| Summary and Conclusions. |
Introduction.
The entrance to the Manukau Harbour and the lower part of the Waikato River separate three notably distinct topographic and structural regions. That to the north of the Manukau is characterized by a broad range of hills of resistant rock, deeply dissected by streams. The middle area is constituted by a line of ancient sand-dunes facing the ocean, and is considerably worn by streams, moderately low country rising behind it to the east. The third area, that south of the Waikato River, is a broad minutely-dissected upland of more varied structure than the others, and it, with the second or middle area, forms the subject of this paper.
Previous Work in the District.
Hochstetter (1867) in 1859 collected fossils from the Waikato South Head, as well as from the plant-beds near Oruarangi Point, some four

miles farther south, and classed the beds containing them as Neocomian. The sand-dune area was briefly described by him, and the structure illustrated by a section across the sand-dunes near the northern end.
Park (1910) alludes to the dune formation of the sandhills, and further calls attention to the oxidation of the ironsand into hard bands of limonite.
Cox in 1876 journeyed south along the coast from the mouth of the Waikato River, but so hurriedly that he appears to have failed to observe a conspicuous unconformity in the Tertiary strata at the Kawa Stream (fig. 11) and a less noticeable one at the Waikawau Stream (fig. 9), though in his report he expressed the conviction that an unconformity existed at the base of the beds he called the “Cardita beds,” and classed as lowest Eocene in age.
Hutton (1867) had reported on the same district, and would seem to be misunderstood by Cox (1877, p. 16) when the latter quotes him as classing the Cardita beds with the Waitematas, in which he distinctly says he could find no fossils (1867, p. 16). Cox's report is somewhat confusing.
One of the most valuable contributions to the knowledge of the geology of Port Waikato district is that by the late E. A. Newell Arber (1917), who allocated the plant-beds of the Mesozoic sequence to the Neocomian. A feature of particular interest is his discovery of leaves of the angio-sperms Artocarpidium Arberi Laur. and Phyllites sp., thought by him to be amongst the earliest dicotyledons yet discovered, and, as Dr. L. Laurent says, “it is hardly possible to attach too much importance to the discoveries.”
Bartrum. (1919B) described a fossiliferous bed at the Kawa Creek, some fourteen miles south of Waikato Heads. He published a list of fossils collected from the bed, and described six new species discovered there by him (Bartrum, 1919a).
Almost the only other reference of any importance to the geology of the area studied is one by Bartrum (1917) to the discovery of several types of volcanic rocks in pebbles of conglomerates in the Mesozoic strata.*
The Coastal Area between Manukau Entrance and Waikato River.
From the Manukau Harbour to the Waikato River, in a belt averaging five to six miles in width, stretch now deforested hills, which for twenty miles form a straight coast-line of almost continuous cliffs averaging 500 ft. to 600 ft. in height, broken only by the narrow valleys of a few streams draining to the west. Immediately behind these hills is a belt of low country bordering the Waiuku Creek, and forming the Akaaka Swamp in the south. East from this belt the land rises gently, forming undulating country of subdued topography, the highest point being the volcanic cone of Pukekohe Hill, some 710 ft. high.
The characteristic cross-bedding of wind-deposited sands is conspicuous from top to bottom along the line of cliffs facing the sea (Plate XX, fig. 1). The beds vary in texture from a fine to a fairly coarse sand, and many consist of a large proportion of magnetite with grains of feldspar and some quartz. Certain very fine beds appear to be pumiceous. The contained magnetite has been oxidized to the brownish hydrated oxide of iron
[Footnote] * Whilst this was in press reference to the geology of the district appeared in a report by Dr. J. Henderson on the Huntly Subdivision, which was published in 14th Ann. Rep. N.Z. Geol. Surv., 1920, and distributed early in 1921.

(limonite), forming tough, resistant, anastomosing bands, or more frequently lens-like or irregular beds of considerable thickness, which constitute the most resistant parts of the nearly vertical cliffs, and in a few cases, as at the Fishing Rock, opposite Waipipi, form reefs running a short distance out to sea.
From the general proximity of the watershed to the line of cliffs, and the longer and more gentle easterly slope towards the Waiuku Creek, and from the loftiness of the cliffs, which have been cut back by the waves almost to the watershed, and the character of some of the lower beds, it is evident that these hills at one time extended much farther seaward—probably several miles at least. Except in the extreme south of this area the sand of these hills is much limonitized and consolidated, while the surface on the easterly (or landward) slope is decomposed to a yellowish-red clay to a depth often of 6 ft., and is covered with a fairly good soil.
Near the Waikato River and the “gaps” or stream-valleys opening west the surface is composed of loose sand travelling inland. This is particularly well shown at Lake Pokorua. Only in a few places, such as the Waiuku and Pokorua gaps, is there convenient access to the beach.
A mile south of Pokorua Stream outlet a bed of lignite outcrops for a distance of 100 ft. at the foot of the cliffs. It is about 5 ft. above high water, but rises gently to the south. The only other bed of lignite outcropping on the coast is a small one in a short stream-valley two miles south of Manukau Heads. The only other lithologic feature deserving of mention is a bed of sand from 3 ft. to 6 ft. thick, near the foot of the cliffs close to the outcrop of lignite, which is a fine, light, white sand, evidently pumiceous.
The Area East of the Sand-dunes.
To the east of the sand-dune range, bands of lignite 18 in. thick can be seen on both sides of Waiuku Creek, just above or at high-water mark Beds which are either pumiceous or of very fine light sandstone occur above the lignite. On the east bank a coarse conglomerate sometimes occurs. A short distance to the north of Awhitu Wharf a bed of lignite occurs intercalated in sand. Stream-bedding is noticeable in most of these deposits of sand along the Waiuku Creek.
Hochstetter (1867, p. 272) furnishes a section which seems too generalized in respect of the lignite formation. The occurrence of but two small bands, the larger not more than 100 ft. long, in a length of sea-cliff extending twenty miles hardly warrants the use of the name “lignite formation” to include the western lower beds on the coast range in which these two bands occur. Their very frequent occurrence in the sand and silt-beds along the Waiuku Creek, however, amply justifies the name so far as it is applied to the low-lying area east of the coast range. The undulating country east of Waiuku Creek and of the Akaaka Swamp consists of an extensive deposit of basaltic breccia—the “basaltic boulder formation” of Hochstetter (1867, p. 268), Hutton (1867, p. 7), and Cox (1877, p. 17)—mixed with much red loam resulting from decomposition of the breccias and tuffs.
The most extensive lava-flow is that at Waitangi Stream, two miles from Waiuku; whilst the volcanic tuffs become very prominent in the Koraka district, near Drury. On the south side of the Waikato River, at Pakau Stream, and at Tauranganui, three miles to the north-east, lava-flows occur associated with volcanic breccia similar to that forming several small isolated hills in the Akaaka Swamp. Evidence of stream-bedding has been observed in the tuffs and breccia at Tauranganui.

A Suggestion of Origin of the Sand-dunes and of the Lignite-beds.
North of Manukau Harbour is a strongly resistant coast-line which has retrogressed considerably owing to wave-attack. Similarly, south of the Waikato River all evidence points to considerable sea-cliff recession. The writer's belief touches entirely new ground, and it is this: that regularity of coastal outline was reached between Waikato Head and Manukau North Head by spit or perhaps barrier-beach formation in the not distant past, when the relative level of sea and land approximated the present, and that a great estuary of the Waikato River was formed behind this barrier, in which pumice-silts were deposited and bands of lignite formed. This beach supplied the material raised by wind into lofty sandhills, which have been cut into by the waves as the shore-line advanced towards maturity.
Mr. J. A. Bartrum, in mentioning to me that this accorded with his own view, called my attention to a fact which I have since been able to confirm—namely, that there are similar sand-ranges west of Helensville, going north along the western margin of the Kaipara Harbour. He further pointed out that in that district there is every evidence of former uplift in elevated erosion-plains.
This theory of the origin of the sand-ranges with an extensive estuary of the Waikato River behind them readily accounts for the origin of the pumiceous silts and the lignite bands west of the ranges, for it is believed that the silts were formed in the estuary by the deposition of fine material, largely pumiceous, brought down by the Waikato River from the great pumice lands of the middle of the Island. There are pumice-silts at Mangere, opposite Onehunga, at Otahuhu, and near Drury and Papakura. They are thus very widespread round the shores of Manukau Harbour, the waters of which cannot have supplied the material. The Waikato River, then, appears to be the only source of origin that can satisfactorily account for these silts. Well-borings in various places around Waiuku and the Akaaka Swamp support the view that an extensive estuary existed. The lignites at and above high-water mark along the Waiuku Creek, and exposed in railway-cuttings between Otahuhu and Papakura, would be formed in this estuary by the accumulation of vegetable material in the swamps.
The two lignite bands at the foot of the sand-dunes on the coast contain fragments of wood, undecomposed or slightly carbonized, and, amongst other vegetable remains, the abundant long leaves of the raupo (Typha angustifolia). They were probably formed in shallow lakes or lagoons occurring in the hollows of the sandhills in their early stages, just as the remains of similar vegetation are accumulating at the present time around the swampy raupo-covered margins of Lake Pokorua, north-west from Waipipi, and other lakes even in the shifting sand-dunes near the Waikato River. It is possible, however, that they had an origin similar to that of the Waiuku bands—that is, in the swamps marginal to the early Waikato estuary, which have since been covered up by the inland advance of the dune-belt, and then re-exposed by sea-cliff recession in conformity with the general retrogression of the coast both north and south of this area.
Sub-recent Oscillations of Level: Origin of Manukau Harbour.
The bands of lignite exposed at frequent intervals along the banks of Waiuku Creek are either at or slightly above high-water mark, and are covered to a depth of from 5 ft. to 20 ft. by silts. They thus furnish evidence of sub-recent minor oscillations of the district. In the arm of

Manukau Harbour that penetrates to Otahuhu—indeed, in most of the harbour's ramifications—similar evidence is available. These silts are now being cut back rapidly by wave-action at high-water,* and present low cliffs that rise to no great height above high-water level.
The story they unfold is briefly as follows: After their deposition, uplift over the whole Auckland area occurred, of which local evidence is found also in the Waitemata Harbour.† Following the uplift the silts were dissected by the various streams emptying into the Manukau Harbour, such as the Waiuku, and the present channels thus formed. Depression soon followed, admitting the tidal waters into the stream-courses. (See fig. 2, A.)
Mutual Relations of the Areas North and South of the Waikato River: an Hypothesis of Major Faulting.
It is believed that the northern shore of the Manukau is roughly coincident with a fault-line running east and west, and that the Waikato River in the last few miles of its course traverses another fault-line parallel with the first, cutting the Mesozoic rocks at right angles to their strike. This latter has been called the Waikato fault. The country between is deemed faulted down at least 2,000 ft., leaving the eroded Mesozoic rocks on the south standing 12,000 ft. above sea-level.
Fig. 3.—Coast section, Waikato South Head. a', belemnite marly shales; a, sands and shales; o, sandy limestone; c, brown sands and silts; d, gray clays and silts; e, red clays and sands; f, zone of comminuted shale; g, fault.
Though no conclusive evidence of the faulting could be obtained, the south bank of the Waikato River presents the appearance of a deeply dissected fault-scarp; and, further, at the South Head there is a nearly vertical fault,
[Footnote] * Tidal interval at spring tides, 14 ft.
[Footnote] † I am indebted to Mr. J. A. Bartrum for pointing this out to me, and for a sketch of the continuation of Grafton Gully into the harbour, which he drew from data supplied by the Harbour Board, and which is reproduced in fig. 2, B.

heading 30° to the north and striking 30° north of east, roughly along the line of the river, and traceable for some 50 yards. The limestones on the north must be downthrown 200 ft. to 300 ft. at least. This fault may very well be one of the step-faults of the zone of faulting referred to above. Brown sands and sandy limestone are here brought in contact with Mesozoic shales (belemnite-beds) dipping 45° south west and striking 30° west of north, forming the southern (or upthrow) side of the fault. The shales are finely comminuted in a band some 20 ft. wide along the line of the fault.
The most important reason for suggesting faulting is the abrupt termination of the older rocks along a fairly definite line, and their replacement by an area of much later sedimentation. Along the maturely dissected scarp of the Waikato fault between Maretai Stream and the South Head, wave-attack has in places produced typical sea-cliffs, above which are hanging valleys.
It is possible, though unlikely from their position, that river-planation, and not wave-attack, was responsible for the wearing-back of these cliffs.
The Area South of the Waikato.
General Description.
The country to the south of the Waikato River dealt with herein is an upland, 600 ft. to 1,200 ft. above the level of the sea, consisting of uniformly resistant rocks, except along the sea-coast, where the upper portions are much less resistant than the lower. This upland is deeply dissected by stream-valleys running north-west and east from the main watershed, which sends out numerous sharp spurs, so that the surface is very uneven and rugged.
presenting few level tracts. The rocks consist of a basement (herein called the “older-mass”) of symmetrically folded sediments, on the eroded and weathered surface of which in many places the younger-mass beds* rest horizontally, and therefore unconformably; these latter consist of moderately resistant marine sediment. They again are covered unconformably along the coast by less resistant Pleistocene and Recent† clays and sands.
[Footnote] * Part of the Notocene of Thomson (1917, p. 408).
[Footnote] † The Notopleistocene of Thomson (1917, p. 411).

Drainage of the Southern Area.
The Opuatia River, with its upper east-flowing tributaries, cuts across the strike of the rocks of the Mesozoic older-mass where these are exposed in its upper course. This indifference to the strike of the folded rocks can be explained by supposing these streams to be superposed consequents. On account of having had their courses shortened by coast-recession, the streams flowing west from the watershed are shorter than those to the east. Those flowing north-west, having maturely dissected the fault-scarp facing the Waikato River, are obviously streams consequent on the deformation. Their courses are short and their drainage areas small.
From Port Waikato the main watershed runs in a south-easterly direction for forty miles or more.
The Maretai Stream, flowing north into the Waikato River, has cut its way down to grade along what is believed to be a fault-line, on the west side of which the beds of the older-mass are strongly downfaulted, the scarp on the upthrow (or eastern) side being immaturely dissected. This fault probably extends a long distance south-west. A sunken outlier of the younger-mass at Newdick's, on the western side of the stream-valley, appears to owe its position to the effect of the faulting along this line.
Most of the streams flowing east or west are graded, and the Okahu and Maretai Streams, flowing north-west, are similarly graded in their lower courses. The Waikawau Stream, seven miles south from the Waikato River, is graded for some two miles of its lower course. Its middle course is between the high vertical walls of its limestone gorge, which soon widens out to a broad valley, the floor of which is covered by flood-plain and delta deposits.
The Kawa Stream, still farther south, has a comparatively bottle-necked outlet to the sea. In its middle course it flows across extensive flood-plain swamps, which cover a broad depression, believed to have originated in the foldings and dislocations of the beds of the older-mass and younger-mass alike, which are made evident in the coast sections from the Waikawau Stream along the Waiwiri Beach to the Kawa Stream. Solution may have played its part, as in the Waikawau and upper Huruwai valleys. The writer's first impression was that it represented a gigantic sinkhole.
The Older-mass of the Southern Area.
It has been pointed out above that the southern area consists strati-graphically of a younger-mass unconformably overlying an older-mass. The writer considers that the sediments of the older-mass are folded in fairly symmetrical waves measuring four miles from crest to crest, the strike of the axes of the folds being about 30° west of north. The limbs of the folds have an average dip of about 30° and a maximum of 45°. The average is that of thirty-two determinations in different localities. These sediments are therefore not less than 7,000 ft. thick in those portions above sea-level. The conclusion as to the symmetry of the waves is deduced from the evidence of strike and dip of the beds along the Waikato River, as well as from those along the Opuatia and Huruwai Streams and the coast sections.
In the deepest part of the anticline, which is exposed in a good section at the South Waikato Head, the lowest beds visible are the belemnite shales—a fine, slightly calcareous mudstone containing some thin, light-coloured, highly calcareous bands. In these, but more conspicuously in

all the higher beds in this formation, plant-remains are abundant, though rarely in other than fragmentary form. Tree and fern trunks and large roots are abundant, more particularly two miles south of the Heads in a very thick bed of concretionary sandstone.
The following is roughly the sequence, in ascending order, of the beds as shown in the coast sections from south of the Huruwai Stream to the Waikato Heads. (See Plate XXI, fig. 2.)
| (1.) |
700 ft. of dark marly shales containing marine fossils (Cox, p. 20), and herein spoken of as the “belemnite-beds.”* |
| (2.) |
Hard grey sandstone with shaly beds. |
| (3.) |
Thick beds of concretionary sandstone, containing tree-trunks in abundance, amongst which could be recognized some resembling tree-ferns. These beds thin out laterally, rapidly giving place to thin bands of shale and sandstone. |
| (4.) |
Shales with bands of a hard, shiny, black, impure coal 1 ft. and 1 ½ ft. thick, dipping seaward at an angle of 35° to west. These outcrop on the strike coast near Hanwai Stream. |
| (5.) |
Alternating beds of hard shale and sandstone, the shale bands outcropping at Oruarangi Point, about five miles south of Waikato River, being rich in well-preserved plant-impressions. |
| (6.) |
Bands of shale interbedded with sandstone and containing thin coaly bands. |
| (7.) |
Fine conglomerate. |
| (8.) |
Coarse sandstone, stream-bedded, with large fragments of wood, outcropping on the beach south of Huruwai Creek. |
Fig. 7.—Observed section north of Hanwai Creek. Height of section, 200 ft.; length, 100 yards. Mesozoics (strike 25° west of north, dip 35° to west) overlain by horizontal Notopleistocene beds.
Though the strike of the main axes of the folds is 30° west of north, it occasionally changes locally to north-and-south and east-and-west, for there is much local distortion, notably in the axis of the syncline where the Waimate Stream enters the Waikato River, about two miles above its mouth.
[Footnote] * A similar series of shale-beds, though unfossiliferous, appears at the top of the watershed between the Okahu and the Moewaka Streams, where deep weathering has increased their friability.

A little north of Orairoa Point, six miles south of Waikato River, the basal sedimentaries disappear under the seaward-dipping beds of the younger-mass, and are not found again north of the Kawa Stream, though they are said to outcrop farther south.
From the South Head to the Waikawau Stream the Mesozoic beds form locally a prominent strike coast—i.e., the coast follows the strike of the seaward-dipping beds, leaving here and there a promontory of very resistant sandstone beds presenting precipitous bluffs to the fierce attacks of the violent Tasman Sea.
The Marine Fossiliferous Shales or Belemnite-beds.
As stated above, the shale-beds at the Waikato South Head contain marine fossils. Cox (1877, p. 19) reported having obtained the following: “Aucella plicata, Inoceramus haasti, Inoceramus (sp. ind.), Belemnites aucklandicus, Halobia sp., Placunopsis striatula, and other species not determined.”
As the result of many hours of patient search, the writer recently gathered from these shales numbers of belemnites, which are abundant, and eight or ten other fossil species not yet determined, but the majority apparently not previously reported from this locality. All that can be said is that amongst the species found at Waikato Heads shales are brachiopods, pelecypods, and gasteropods.* (See Plate XXI, fig. 1.)
The Fossil-plant Beds.
From 2,000 ft. to 3,000 ft. higher up in the conformable sequence occur the beds near Oruarangi Point first collected from by Hochstetter (1867, p. 278). These are alternating sandstones and shales, and contain abundant well-preserved plant-fossils.
Newell Arber (1917, pp. 18, 20) in a recent palaeontological bulletin describes and figures a number of fossil plants from these beds.
After a careful comparison of the plant-fossils gathered on two visits to these plant-beds, and of others gathered by Mr. J. A. Bartrum from
[Footnote] * Mr. J. A. Bartrum has informed me since the above was written that he forwarded a selection of the fossils from these beds to Dr. C. T. Trechmann, of Durham, and amongst them the following forms were determined by him (accompanying remarks are those made by Dr. Trechmann): Arca (Parallelodon) egertonianus Stoliczka (found in Spiti shales, India, and in Somaliland); Arca blandfordiana Stoliczka; Aucella cf. spitiensis extensa Holdhaus; Limea sp. (two); Pyrgopolon (?) (? a serpulid); Serpula sp. (the Serpula is rather like Serpula convoluta Goldf. from the Dogger: see Zittel-Eastman, p. 138); Trigonia sp. Several other forms, notably lamellibranchs and a serpulid, though generically unidentifiable, furnish additions to the above list.

the same place, with those figured by Arber, a selection was made of types that appeared to be new, and forwarded by Mr. Bartrum to Arber for determination, but his death occurred before he was able to examine them.
On the banks of the Waikato River near Waimate Creek, at about high-water mark, well-preserved plant-impressions can be obtained from various beds, especially from one of fine white sandstone about 1 ft. in thickness. Some 6 ft. above this bed occurs a bed of coal 12 in. to 18 in. thick associated with a similar fine sandstone. These beds, occurring in the axis of a syncline, are not less than 2,000 ft. above the belemnitebeds, from which they are distant two miles across the general strike of the sequence, the effect of downthrow along the Maretai fault-plane being taken into account.
Age of the Older-mass.
Arber (1917) classes the upper plant-beds at Oruarangi Point in the Neocomian, as did Hochstetter (1867) originally. The fossil plants in the beds mentioned above at Waimate, about two miles up the Waikato River from its mouth, are apparently the same as those at Oruarangi; the beds containing them are therefore Neocomian, and hence the lower belemnite-beds are most probably of Jurassic age.
General History of the Coastal Area South of the Waikato River.
Mid-Cretaceous uplift and folding of the Jurassic and early Cretaceous sediments (here spoken of as the “older-mass”) was followed by dissection and by planation to a greater or less degree; depression then ensued, and was succeeded by a long period of sedimentation, during which most of the beds of the younger-mass were laid down. Subsequent deformation of the older-mass, involving warping and dislocation of the beds of the younger-mass, and general though unequal uplift, initiated a long period of erosion, during which movements of elevation continued, and the younger-mass was stripped from much of the higher portions of the uplifted area, whilst the older-mass was deeply cut into by superposed consequent streams. At the same time, too, the fault-scarp along the line of the Waikato River, a product of the deformation which followed the conclusion of deposition of the younger-mass, was maturely dissected.
During the period when the beds of the younger-mass were being laid down slight uplift took place, at least in some localities, as at the Kawa, where the movement was sufficient to bring about sea-planation of certain impure limestones after they had been slightly warped. With slow depression, again, other beds were laid down unconformably above the warped and planed limestones; local volcanic activity occurred depositing beds of ash and lava. These were again covered by swamp-silts, and, upon uplift, by wind-blown sands.
Relation between the Mesozoic Older-mass and the Younger-mass (or Notocene) Beds.
The Notocene beds, using the name suggested by Thomson (1917, p. 408) for the “covering strata” or “younger rock-series” of New Zealand, were deposited on the eroded surface of the folded older-mass. (See figs. 3, 4, 5, 6, 7, and 8.)
An outlier of Notocene beds at Pa Brown, high up near the source of the Moewaka Stream, a tributary of the Opuatia, is of great importance as indicating the former greater extent of these beds. This small outlier, covering about a quarter of a square mile, consists of 40 ft. to 50 ft. of platy bands of an extremely hard limestone, containing abundant large

oyster-shells, sharks' teeth, and small indeterminate shell-fragments, underlain by a thick layer of calcareous sandstone, very similar lithologically to that in the bed of the Opuatia Stream four to five miles farther east. A short distance to the west the Mesozoic rocks of the watershed rise 100 ft. to 200 ft. higher.
An examination of the upper parts of the valleys of the Maretai, the Huruwai, and the Waikawau Streams reveals the same phenomenon as the Opuatia Valley—namely, that the Notocene suddenly appears deep down in troughs in the Mesozoic older-mass. The lowest beds there observable are calcareous sandstone, passing upwards into a hard, scantily fossiliferous, platy limestone, which changes in facies with great rapidity. Again at the Waikato South Head there is a downfaulted block of the Notocene beds which owes its preservation to its resistant character. (See fig. 3.)
No shore-line deposits have been found in these valleys or depressions to support the view that the Notocene beds were laid down in deeply eroded valleys into which the sea penetrated when the land was depressed, although fragments of Mesozoic rocks were found in a basal bed of the younger-mass near Orairoa Point, half a mile south of the Huruwai Stream. The upper Notocene beds are often of hard, pure limestone, and must have been deposited in deep, clear water at a distance from land. Having in view the fact that the Notocene beds have suffered very considerable erosion, the final conclusion is that they covered the whole area—even the more elevated tracts occupied by the Mesozoic rocks, where now no trace of them is left. They covered a broadly truncated surface of the Mesozoic rocks, and when later uplift set in would be removed most readily from the uplifted areas. As pointed out, the Notocene beds in several places occupy valley-like depressions in the Mesozoic strata, either as the result of faulting or owing to involvement in the folding of the Mesozoic older-mass that occurred subsequent to the deposition of these younger-mass beds. The latter supposition appears the more probable explanation, although a more careful examination of the district is needed to settle the point.
The Younger-mass (or Notocene) Beds.
The beds of the younger-mass dip slightly to the south along the coast, and their sequence from their lowest upwards is not easy to determine. The following is the probable upward sequence:—
| (1.) |
At the base algal tabular limestone. It contains angular fragments of the underlying Mesozoic rocks where it rests on the latter at Orairoa Point, north of Huruwai Stream. This limestone seems to rest on still lower blue sea-muds, and to lose both its tabular and brecciaceous character. |
| (2.) |
Grey calcareous sandstone, 300 ft. thick in places such as the Opuatia Stream valley and the upper Waikawau, changing to a blue sea-mud at the base of the outcrops on the coast between the Waikawau and Kawa Streams. |
| (3.) |
Tabular limestones. At the Waikawau and the Ruahine Streams, and along the northern half of Waiwiri Beach, the upward succession is of alternating calcareous sandy beds, and thin, hard, marly limestone, all becoming tabular, sandy, or even shelly limestones farther back from the coast and south from the Ruahine Stream. They appear as a pure, hard, coarsely crystalline limestone in a large cave two miles from the coast on the north bank of the Waikawau Stream. Half-way up this series of thin beds a discontinuity occurs in the Waikawau section. |

Minor faulting and some planation, probably by wave-action, occurred, and was followed by the deposition of a dark-greenish sandy bed containing many easily gathered marine fossils. Other similar but less fossiliferous beds follow, being interbedded with thin, hard, closely-jointed, more calcareous layers, the whole attaining a thickness of 130 ft. to 150 ft.* They are called the “blue marls” or “Cardita beds” by Cox (1877), from the presence in them of “a large Cardita that cannot be distinguished from ‘Cardita planicostata’ of Europe [see Hector, 1877, p. viii], and are probably of Lower Eocene age.” They are correlated with what has been spoken of earlier in this paper as the tabular limestones of Pa Brown and other localities.
The exposures of the Notocene beds along Waiwiri Beach show some warping and frequent faulting on a small scale, with possibly a much more powerful fault at a point where the sea-cliffs are temporarily interrupted. (See fig. 10.)
The beds of Koruahine Bluff, at the south end of Waiwiri Beach, which could not be definitely correlated with others either north or south in this section owing to the rapid changes in the facies of the limestones, furnished numerous fossils, among which were abundant echinoids, a few brachiopods, several species of Pecten, and abundant Foraminifera, with occasional sharks' teeth. They are not like the fossils of the “Cardita beds,” which are prominent along Waiwiri Beach, but rather resemble those of the shelly bed at the Huruwai Stream and of the tabular limestone at Waikato South Head. These beds probably correlate with the warped and sea-planed beds of the syncline at the base of the Kawa section, for their fossil content is somewhat similar. Thomson has expressed the opinion after examining them that the brachiopods are typically Oamaruian.
[Footnote] * On revisiting the Waikawau in February of 1920 the writer found an immense slip had recently occurred, obscuring the features of the section here referred to, but facilitating the collection of fossils from a very fossiliferous band higher up the cliff than the rubble-bed.

The glauconitic greensands of the south Kawa section (see fig. 11) were not traced north of the Kawa Stream.
| (4.) |
Above the tabular limestones appear fine light-coloured silts and clays. These close the Notocene sequence. |
| (5.) |
Brown sands. As pointed out already, the Notocene beds show folding, and on their eroded surface rest the younger beds.* In most of the sections the brown sands follow the tabular limestones unconformably. However, near the Hanwai Creek and the Waikato South Head they rest on beds of fine light-coloured silts and clays, called by Hochstetter (1867) “Pleistocene silts,” which contain no fossils. (See figs. 3 and 7.) The brown sands show the characteristic irregular bedding of wind-blown sands, except where bands of silt are interbedded with them in their lower parts. |
| (6.) |
Shifting sands of recent date close the sequence. |
The Kawa Section.
The most important section shown along this coast is that to the south of Kawa Stream, and referred to herein as the “Kawa section.” The well-marked unconformity in the sequence of its strata, the evidence of volcanic activity, and the pumice-bed, 170 ft. to 180 ft. above sea-level, possibly
connecting these beds with the history of the Waikato River, are the features which give it this importance. It was described in detail by Bartrum (1919b). The following brief description contains a few facts not recorded by him.
Order of Ascending Sequence. (See fig. 11.)
| 1. |
Blue calcareous sea-muds. |
| 2. |
Glauconitic greensands (15 ft. to 20 ft.). |
| 3. |
Above the glauconitic greeesands come 50 ft. to 60 ft. of thin calcareous sea-muds. These thin beds, after deposition, were affected by movements of compression, resulting in faulting and gentle folding, and accompanying uplift. Then followed a period of planation by the sea which cut their upper surface into a plane of marine denudation. |
| 4. |
Fossiliferous yellow sands to a depth of 36 ft. were now deposited by the sea on the marine-planed surface of the slowly sinking land. Mr. J. A. Bartrum has published a list of fossils from this bed and has described some new species (Bartrum, 1919a and 1919b). |
[Footnote] * The Notopleistocene beds of Thomson (1917).

| 5. |
Volcanic ash, breccia, and basaltic lava. The marginal portions of the plug contain included fragments of the calcareous beds through which it was extruded. The volcanic-ash bed contains large fragments of the underlying calcareous beds, and varies from a coarse ash in the north to a breccia or agglomerate as it approaches the neck of the volcano. These beds are distinctly unconformable to the underlying fossiliferous sands. |
| 6. |
Stream-bedded sands, 30 ft. thick, follow; they include a band of lignite 8 in. thick. In proximity to agglomerate which is above the volcanic lava-plug they appear locally to overlie beds of included tuff of which the upper limit is a sharply marked erosion-plane coincident approximately with the upper level of the yellow fossiliferous sands. |
| 7. |
Brown sands (30 ft.) follow, whose lower layers are horizontally bedded, whilst higher up they are composed of peculiar lenses encrusted by limonitized ironsand. The thin encrusting layers show an interlacing tendency typical of wind-blown sands where the winds change direction frequently, and so form confused series of ripple-marks. It is not easy to explain why the encrusting layers alone should become limonitized, leaving the sand between loose and unaltered. |
| 8. |
Pumice-bed (10 ft. to 20 ft.). This is a white, light, slightly plastic clay band, its very thinly bedded nature indicating deposition in the fairly still water of a swamp or lake. It is undoubtedly a fine pumice, enclosing large fragments of the same material. Non-pumiceous silts of irregular thickness replace the pumice to the south, above the volcanic conglomerate which covers the remnant of the lava-plug. |
| 9. |
200 ft. of brown, oxidized, wind-blown sands rich in limonite concretions. |
The Kawa Pumice-bed in Relation to the Waikato River.
The occurrence of this bed of pumice-sand, containing coarser fragments of pumice, 180 ft. above high water, so far south of the mouth of the Waikato River makes one hesitate to ascribe its origin to transport by that river of material from the pumice plateau through which it flows for so much of its upper and middle course. No other origin, however, readily suggests itself, whilst this theory has several facts to support it:—
| (1.) |
There is no other visible source whence the material may be derived. |
| (2.) |
The characteristic deposits made by the Waikato in the Bay of Plenty district and in the Hauraki Plains are largely rhyolitic pumice-silt which resembles the Kawa deposit. |
| (3.) |
Not only has the coastal area risen, but the whole country to the east and south-east as far as the middle Waikato basin, including the southern portion of the Hauraki Plains, across which the river flows in a north-westerly direction, has also been elevated with reference to sea-level since the course of the Waikato River was diverted from its old channel leading through the Hinuwera Valley to the Hauraki Gulf. There has thus been regional uplift. At the point below Maungatautari Gorge where the river enters the middle Waikato basin the surface of the plain is 300 ft. above sea-level. According to Henderson (1918, p. 60) this plain was formed by loose pumice of fluviatile origin whilst the land was depressed. About this time also the river changed its course from the Hinuwera Valley to the north-west across its own alluvial plain. (See Henderson 1918, pp. 112–15; and Cussen, 1889, p. 409, and 1894, pp. 401–10). The pumice of the Kawa beds must have been brought down at that time and deposited in a depression forming a swamp on the borders of a large estuary or low-lying coastal land such as then existed. When elevation ensued the tendency would be for the river to deepen its bed, and this has been done across the middle Waikato basin, the deepening here corresponding approximately to the uplift of the |

|
Kawa pumice-bed, above which all the beds are subaerial deposits. (See Cussen, 1889, p. 413.) |
|
| 4. |
It might be suggested that wave transport may have brought the pumice from far-distant localities; but the nature of the material and its bedding negative such a suggestion. |
It may be mentioned that Mr. Bartrum (1919a, p. 104) similarly is inclined to ascribe the origin of this pumice-bed to the Waikato River.
Structural Plateau near the Coast.
The Notopleistocene formations along the coast form a structural plateau governed by the bedding of the horizontal sheet of limonitized sands forming the uppermost beds and now acutely dissected by the westerly streams. The residual ridges between these streams are all about the same height, and, seen from the northerly geodetic station, Waihonui, they are remarkably uniform. These divides are sometimes, as at Waihouni and Opura, small tablelands, remnants of the old platform.
Slipped Country above Waiwiri Beach.
For a quarter of a mile back from the Waiwiri beach the country has slipped along parallel lines, presenting seaward-facing scarps 10 ft. to 30 ft. or 40 ft. high. The whole area between these scarps and the sea-cliffs is tossed into hummocky mounds. Only the upper or sandy beds appear to be affected, and these are being slowly pushed over the cliffs on to the beach. The scarps form a rude semicircle facing the sea for a distance of over a mile. They are said to be as fresh-looking to-day as they were forty-five years ago. The scarps reveal cross-bedding everywhere.
The composition of these beds is a light, dull, black sand, the blackness not being due to grains of magnetite, which is not abundant, but to dull, light grains of material probably owing its origin to the erosion of shale-beds of the Mesozoics. They are unlike any of the other beds north or south that occupy a higher horizon than the Cardita beds or tabular limestone. The Cardita beds appear to have formed the base of a plain of marine denudation in this locality, possibly contemporaneous with that at the Kawa, or perhaps more recent, when the yellow and brown sands, &c., were removed by wave-action.
Sinkholes.
Close to the ridge above the great area of slipped country are several sinkholes, or swallow-holes, vertical cavities formed by the internal running of the sands beneath the surface, which then subsided. Similar sinkholes can be observed in the pumice lands near Hamilton. One at Pa Brown, due to solution of the limestone beneath the surface, is of much larger dimensions than those between the Ruahine and Kawa Streams.
Microscopic Characters of some of the Rocks.
The Kawa Basalt.—In a holocrystalline pilotaxitic groundmass consisting of long microlites of feldspar, showing good flow-structure, with less prominent prisms and grains of augite and olivine and very numerous fine specks of magnetite, occur separate phenocrysts of augite and olivine, and some glomero-porphyritic phenocrysts of olivine and augite with associated chlorite. The augite is usually colourless, but sometimes has a pink border. The olivine phenocrysts show the mesh-structure characteristic of alteration to serpentine along lines of fracture and around the edges. A secondary fibrous mineral, chlorite, is formed in numerous cavities. Large olivine nodules, up to 2 in. in diameter, are numerous in this basalt.

Fig 1.—Showing the characteristic dune-bedding in the consolidated sands close to the bed of lignite near the Fishing Rock, on the coast north-west of Waruku.
Fig. 2.—Photomic rograph of algal limestone north of To Orairoa Point. The section shows the structure of the algae very clearly, but on so fine a scale that the photograph reproduces it poorly. a, an alga (? Lithothamnion); b, Polyzoa; c, a forammiet. probably Amphistegina × 24.
Fig. 3.—Photomierograph of fine Globigerina limestone, Koruahme Point. × 24. (Photomicrographs by J. A. Bartrum.)

Waitangi Bay Basalt.—A couple of miles to the north of Waiuku there occurs a basaltic lava-flow which can be traced along the bed of the Waitangi Stream. Elsewhere it is covered deeply in a ferruginous clay resulting from the decomposition of basalt, so that its extent could not be ascertained. At one time the rock was quarried for road-metal at Waitangi Bay, where the stream enters Waiuku Creek. Here it is coarsely columnar. Examined under the microscope this rock is seen to be quite similar to the basalts common round Auckland City. It consists of a holocrystalline, pilotaxitic groundmass of long feldspar laths and small gr
