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Volume 37, 1904
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Art. XII.—Additions to the Marine Mollusca of New Zealand.

[Read before the Wellington Philosophical Society, 2nd November, 1904.]

Plates VII. and VIII.

Some few months ago I received from Mr. A. Hamilton Director of the Colonial Museum, an interesting parcel of small and minute shells, which had been obtained by beach-gatherings at Whangaroa Harbour. This collection, though small in bulk, proves exceedingly rich in species. None of the larger forms are represented, and very few of those of medium size: it must therefore be regarded as little more than a tithe of the molluscan life of this northern locality. Several forms hitherto only recorded from Foveaux Strait and Stewart Island make their appearance, some of them in fair abundance.

In addition to the species recorded in the appended list, there are several which I have been unable to identify. Some of them may prove to be undescribed; others, again, are in too worn and damaged a condition—these include Bittium, Colina(?), and Triphora. Of the latter genus three species are represented, one of which has certainly not been recorded from New Zealand waters; it is little more than a fragment, but characterized by its four smooth spiral keels. Of Cryptodon flexuosum, Mont., a single valve occurs. The species is represented in the Colonial Museum collections by a number of separate valves, but the exact locality does not appear to have been given. Most probably they are from Stewart Island, as Captain Hutton records Cryptodon, sp. ind., from that locality.* The genus does not appear to have been again recognised, and in the “Manual of the New Zealand Mollusca,” page 223, is rejected from the list.

The identification of many of our marine shells, perhaps more especially the smaller forms, is decidedly difficult. There is an absence of figures, and the descriptions, unfortunately, are exceedingly brief.

My best thanks are due to Captain Hutton, Mr. Henry Suter, of Auckland, and Mr. Charles Hedley, of the Australian Museum, for much valuable assistance.

[Footnote] * Cat. Marine Moll. N.Z., p. 75.

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Cylichna striata, Hutton. Figs. 1, 2.

Cylichna striata, Hutton, Cat. Marine Moll. N.Z., p. 52 (1873); Cat. Tertiary Moll. and Echin. N.Z., p. 16; Manual N.Z. Moll., p. 120; Trans. N.Z. Inst., vol. xviii., p. 346. C. arachis, Hutton, “Macleay Memorial Volume,” p. 37 (not of Quoy and Gaimard). C. striata, Hutton, “Index Faunæ Novæ-Zealandiæ,” p. 69 (not striata, Pilsbry, Man. Conch. (1), vol. xv., p. 319, pl. 59, figs. 11, 12).

The types of this species are in the Colonial Museum. I have been unable to examine them, but Mr. C. Freyberg kindly did so at my request. They appear to be in good condition, sculptured with longitudinal growth-periods distinctly marked, but a total absence of spiral striæ; in fact, agree perfectly in all characters with the Whangaroa Harbour examples, of which there is a good series.

Pilsbry, when dealing with the specimens he had received from New Zealand, evidently had some doubts as to whether they were the true striata, remarking that the measurements given by Hutton indicated a much smaller form than his specimens. In addition to the larger size of his specimens, the measurements prove that they were of a more narrow, slender form. I have no doubt they were C. arachis, Quoy and Gaimard, with which the description agrees very well indeed. Examples of the latter species from New Zealand (I have only seen two) appear to be rather more minutely spirally striate than those from Port Jackson.

The figures and following description of C. striata is derived from the Whangaroa specimens: Shell short, subcylindrical, thin and white; last half-volution with a lightly concave appearance, more noticeable on approaching the lip. Sculptured with numerous well-marked longitudinal growth-periods, irregularly spaced. The crown concave, with a deep and moderately broad axial perforation. Aperture as long as the shell, narrow above, expanded and effuse below; the inner wall with a very thin callus. Columella thickened, slightly twisted, anteriorly rapidly declining, giving it an almost truncated appearance. In the juvenile stages the columella is usually more gently sloping; the crown with the same crater-like concavity, but the axial perforation shallow; the outer lip almost straight. Dimensions of largest specimen: Length, 3.8 mm.; breadth, 1.87 mm.

It is perhaps nearest to C. pygmœa, A. Adams, from Australia, but this species is adorned with well-marked somewhat distantly spaced spiral striæ.

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Clathurella epentroma, n. sp. Figs. 3, 4.

Shell small, narrowly fusiform, the spire slender. Colour light reddish-brown or dull-chestnut. Whorls 5½, rounded or obscurely angled above the periphery, adorned with fine spiral and longitudinal sculpture, the latter strongest. Sutures deep. Protoconch of about one and a half whorls, strongly angled, and with four smooth narrow revolving riblets, the posterior minute and situate near to the suture; the apical half-turn obliquely curved down and somewhat imbedded in the succeeding whorl. The last whorl rather longer than the spire. Adult sculpture: The longitudinals number fifteen to sixteen small riblets on the last whorl, equal to or rather wider than the interspaces, and usually less developed on the anterior end; they are continuous in some, irregular in others. The spirals consist of undulating delicate riblets and threads. On the spire-whorls there are two, and on the last seven or eight slightly stronger; of these the four posterior are more widely spaced, two are above the outer lip and one in line with it; frequently forming beads on crossing the longitudinals. Within these spaces there are, on that adjoining the suture, four or five threadlets, sometime irregular in size; on the succeeding three spaces, usually three threadlets in each, the median one frequently strongest. Anterior to this the interspaces with one to three threads. The old beaks sometimes forming short irregular riblets. Aperture of medium breadth, less than half its length. Outer lip simple, the posterior sinus shallow. Columella lightly curved, the anterior canal short and broad. Length, 5.73 mm.; breadth, 2.11 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

This is a very beautifully sculptured little shell. The spirals on the anterior portion of the last whorl are somewhat variable in number and strength. The lightly angular appearance of the spire whorls in some individuals is due to the more prominent spirals being rather more pronounced; the spaces on these whorls are similarly adorned to the posterior portion of the last.

Clathurella epentroma, Murdoch, var. whangaroaensis, n. var. Fig. 5.

Differs from the typical form in the whorls being strongly angled, spire somewhat turrited, and the principal spiral riblets much more pronounced, but similarly placed. Colour, number of whorls, and protoconch the same as typical. Longitudinal ribs fourteen on the last whorl, equal to or narrower than the interspaces. Spirals—on the spire whorls two, and on the last four or five, prominent and forming beads on crossing the longitudinals.

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In addition there are on the anterior end a few more crowded and rather smaller. The interspaces with spiral strlæ, four or more, usually minute, sometimes almost microscopic. Outer lip with usually five well-marked sinuations corresponding to the principal spirals, posterior sinus shallow. Length, 6.83 mm.; breadth, 2.5 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

This form appears to somewhat approach Mangilia connectans, Sowb.,* from South Australia.

Mitromorpha suteri, n. sp. Fig. 6.

Shell small, fusiform, somewhat thin, with fine spiral and usually somewhat obsolete longitudinal riblets. Colour light reddish - brown, sometimes a pale band around the periphery, occasionally a narrow darker band at the sutures. Whorls 5, lightly rounded, the last longer than the spire. Protoconch of two whorls, somewhat globose, smooth and polished, the apical turn oblique to the succeeding whorl. Sculpture: The penultimate whorl with six to seven and the last with sixteen to twenty spiral riblets, seven or eight of which are in front of the aperture; they are slightly variable in strength, some in breadth equal to the interspaces, others rather narrower; also an occasional small thread here and there arises in the interspaces. Longitudinals irregular, low and rounded, more distinct on the spire, frequently obsolete. The growth striæ irregular, somewhat marked, and frequently cutting up the spirals into minute gemmules. Sutures impressed, usually margined with a wider riblet. Aperture somewhat narrow, rather longer than the spire. Outer lip thin, a little flattened; the posterior sinus broad, well marked. Columella almost straight, concave and lightly callused; the canal short and broad. Length, 4.56 mm.; breadth, 1.70 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

At first glance this species might easily pass for a Columbella. From M. substriata, Suter, it is at once distinguished by its colour and much stronger spiral sculpture. It appears to be nearest to M. subabnormis, Suter, the latter characterized by the well-developed oblique longitudinal riblets. Suter described this species as Clathurella, but it would appear to be more in harmony with Mitromorpha.

I have much pleasure in associating with this species the name of Mr. Henry Suter, of Auckland.

[Footnote] * Proc. Mal. Soc. London, vol. ii., p. 30, pl. in., fig. 14.

[Footnote] † Trans. N Z. Inst, vol xxxi., p. 74, pl. iii., figs. 5, 5a.

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Drillia lyallensis, n. sp. Fig. 7.

Shell small, fusiform, rather solid. Colour light or dark brownish-red, or somewhat purple (slightly beach-worn specimens). Whorls 6–6½, rather flattened, spire with a lightly turrited appearance, apex smooth; last whorl much longer than the spire, with eleven or twelve low, strong, rounded and slightly oblique ribs, rather wider than the interspaces, obsolete on the anterior half and usually on approaching the outer lip. Spiral sculpture consists of minute striæ, erased upon the ribs, a few at the anterior end stronger, and frequently several rough irregular ridges the remains of the old beaks. Sutures impressed, somewhat deep. Aperture narrow. Outer lip slightly thickened, the posterior sinus near to the suture and moderately deep. Columella lightly curved, not heavily callused; the canal short, broad, and slightly twisted. Length, 12 mm.; breadth, 4.56 mm.

Type in the Colonial Museum.

Hab. Lyall Bay (Mr. C. Freyberg).

This species is not uncommon in shell sand, but in the majority of specimens the finer sculpture is totally erased. Most examples show prominent scars, flexures repaired during the life of the animal. Of the five specimens before me, three are pierced by a carnivorous mollusc, and, strange as it may appear, each in exactly the same spot—a little above and to the left of the outer lip. In sculpture the species most resembles Clathurella sinclairi, Smith.

Cerithiopsis sarissa, n. sp. Figs. 8, 9.

Shell small, narrow, and tapering to a slender point, adorned with spiral and slightly weaker longitudinal riblets which form gemmules on the lines of intersection, base smooth. Colour light or dark brown, somewhat shining; the sutures of the anterior whorls, fourth spiral on the last, and base dark-purplish. Whorls 11–12, sutures deep. Apical whorls without sculpture; the succeeding with three spiral and numerous slightly oblique longitudinal riblets forming rows of gemmules. On the anterior whorls the sutures are margined with a minute beaded riblet; this gradually strengthens, and on the last whorl forms a fourth spiral, with the beading less marked than on the rows immediately above; beneath this a shallow groove, thence gently curved to the columella, and curving obliquely around the latter is a minute ridge which terminates at the canal. Of the three spiral rows of gemmules the two anterior are the largest, and about equal to the interspaces. The gemmules, of which on the last whorl there are seventeen to twenty per row, are somewhat oval, shining and variously coloured, light-brown, pale-chestnut,

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and purple. Aperture ovate, with a well-marked chestnut band on the base, and the colour of the sculpture feebly produced. Outer lip sharp, sinuous. Columella short, nearly straight, and the beak slightly twisted to the left. Length, 6.25 mm.; breadth. 1.8 mm.

Type in the Colonial Museum.

Hab. Kawhia Harbour, immediately within the entrance, on rocks at low tide (R. M.); Whangaroa Harbour and Plimmerton, Cook Strait (Mr. Hamilton).

This beautiful little shell appears to be quite distinct from other New Zealand species. The few specimens obtained are, except that from Kawhia, dead and somewhat bleached; nevertheless the only example with the apex uninjured is from Whangaroa. The protoconch consist of about 3½ smooth rounded whorls, the apex globose, with the first half-turn oblique. The brephic period is not very distinctly marked off—it appears to consist of one volution; upon it a spiral riblet commences, which on the succeeding whorls forms the anterior spiral; thence follows somewhat strong longitudinal striæ, marking as it were short periods of growth, and from amidst these arise two posterior spirals, abruptly followed by the adult sculpture.

Leptothyra fluctuata, Hutton. Fig. 10.

Cyclostrema fluctuata, Hutton, Trans. N.Z. Inst., vol. xvi., p. 215 (1883, issued May, 1884). Leptothyra fluctuata, Hutton, Pilsbry, Man. Conch. (1), vol. x., p. 259, pl. 64, figs. 47, 48. L. fluctuata, Hutton, “Index Faunæ Novæ-Zealandiæ,” p. 81.

This species occurs in fair numbers. The irregular waved longitudinal bands of brown are well marked in some individuals; they extend across the base, but do not reach the umbilicus; the latter usually whitish, at times with broad white radiations. The spiral cingula vary from about twenty-five to thirty-five on the last whorl; the umbilicial area frequently cut up with strong irregular growth-periods. The outer lip descending, rather sharply in some, a thick callus uniting it to the columella. Height, 2.42 mm.; breadth, 3.11 mm.

The figure is derived from specimens collected by Mr. A. Hamilton at Whangaroa Harbour.

Captain Hutton kindly compared these northern forms with the types in the Canterbury Museum.

Hab. Foveaux Strait.

I have also to record the species from the Pliocene formation, Shakespeare Cliff, Wanganui—a single example, smaller than the recent forms.

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Leptothyra crassicostata, n. sp. Fig. 11.

Shell small, solid, turbinate, with strong variable spiral sculpture. Colour whitish or light brown, occasionally with irregular markings of brown, most distinct on and below the periphery. Whorls 4, spire short, apex minute and without sculpture. The penultimate whorl with three to five, and the last with twelve to twenty, spiral ribs, four to nine of which are in front of the aperture. The ribs are very variable in size; there are five to eight strong riblets between the periphery and suture on the outer lip; in front of the aperture four or five. about equal to the breadth of the interspaces. On and immediately below the periphery frequently small and crowded, similar on the base, or there may be two or three more prominent intercalated with the smaller spirals, or the basal riblets generally stronger than those on the periphery. The growth-lines strong and irregular, producing here and there a lightly costate appearance, frequently pronounced in the umbilical area. Sutures impressed. Aperture subrotund. Outer lip sharp, descending, rather sharply in some. Columella lightly curved, somewhat produced and expanded anteriorly, a thick posterior callus spreading across to the outer lip. Umbilicus small and deep. Operculum circular, somewhat calcareous, of six or seven narrow folds, the nucleus central. Height, 2.49 mm.; breadth, 3.21 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

Distinguished from L. fluctuata, Hutton, by its much stronger sculpture.

Columbella huttoni, Suter, nom. mut. Fig. 12.

Lachesis sulcata, Hutton, Cat. Marine Moll. N.Z., p. 12 (1873); Cat. Tertiary Moll. and Echin. N.Z., p. 5; Manual N.Z. Moll., p. 45. Columbella huttoni, Suter, for sulcata, Hutton, preoccupied, “Index Faunæ Novæ-Zealandiæ,” p. 72 (1904).

The specimen figured is from the material collected by Mr. A. Hamilton at Whangaroa Harbour. The shell is small, robust, with well-marked spiral riblets somewhat wider than the grooves; last whorl longer than the spire, lightly carinate, more distinct in front of the aperture. Colour ash-grey, brown, or reddish-brown, sometimes variegated with white. Whorls rather flattened, 6 in number, including a 2- or 2½-whorled smooth reddish-brown protoconch. Sculpture: On the penultimate whorl five and on the last twelve to fourteen spiral riblets, five of which are in front of the aperture; a few of the riblets on the anterior end are minute, sometimes absent. These are crossed by irregular growth-lines, which give to the shell a slightly roughish appearance. Sutures impressed. Aperture oval, outer lip simple;

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columella curved, lightly callused, and frequently a small denticle at the anterior end. Length, 6 mm., breadth, 2.52 mm.

The type locality is Stewart Island, the types preserved in the Canterbury Museum. They would appear to be somewhat larger than the northern forms.

Columbella transitans, n. sp. Fig. 13.

Shell small, fusiform, somewhat shining, with well-marked spiral grooves usually less than half the breadth of the interspaces. Colour light or dark brown, olive, or reddish-brown; some examples with a lighter band immediately below the sutures and produced around the periphery, in others this band is darker than the ground-colour. Whorls 6, rather flattened, the last longer than the spire. Protoconch of two and a half whorls, smooth and shining, light or dark olive, the apex usually lightest. Sutures impressed. Sculpture: The penultimate whorl with five or six and the last with seventeen to twenty-one spiral grooves, six or seven of which are in front of the aperture; occasionally a wider space surrounds the periphery, lightly cleft with a minute groove; longitudinally striate with irregular growth-periods. Aperture oval. Outer lip simple, uniformly curved. Columella lightly callused, the canal short and broad. Length, 5.11 mm.; breadth, 2.14 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

From C. huttoni, Suter, it may be distinguished by its smaller size, more numerous and much narrower spiral grooves. Its sculpture suggests a position intermediate with that species and the next form described.

Columbella paxillus, n. sp. Fig. 14.

Shell small, slender, smooth or with minute spiral grooves; the last whorl lightly angled, only noticeable in front of the aperture. Colour light - brown or reddish - brown or almost black, the sutures occasionally a little lighter. Whorls 5½–6, lightly convex, the last longer than the spire. Protoconch of about two whorls, not well defined, apex polished. Sutures impressed. Sculpture: A few small spirals on the anterior end of the last whorl; above the periphery and on the spire minute, irregular, or absent; occasionally a few inconspicuous longitudinal riblets on the upper whorls of the spire. Aperture short, oval. Outer lip simple. Columella curved and lightly callused, the anterior canal short and broad. Length, 5.04 mm.; breadth, 2.04 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton); Whangarei

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Heads; also Takapuna, Manukau, Kawhia, and New Plymouth.

This little shell occurs in fair numbers. It is nearest to the preceding species; distinguished by the minute irregular spiral grooves, or their frequent absence except on the anterior end.

I may mention that Pyrene flexuosa, Hutton (dark form), is quite different in contour from the above: it has the form of C. choava, Reeve, and is probably only a colour variety of that extremely variable species.

Columbella saxatilis, n. sp. Fig. 15.

Shell small, ovate-elongate, sculptured with fine spiral and stronger longitudinal riblets. Colour light or dark brown, usually a pale band around the periphery. Whorls 6, rather flattened. Protoconch of two whorls, smooth and polished. Last whorl comparatively large. Sutures impressed. Sculpture: Longitudinal ribs sixteen to eighteen on a whorl, low and rounded, equal to or a little less than the breadth of the interspaces, becoming obsolete on the anterior end and usually on approaching the outer lip. Spirals undulating, small but well marked, wider than the grooves; on the penultimate six or seven, and on the last sixteen to seventeen, about seven of which are in front of the aperture; on crossing the longitudinals they have occasionally a somewhat granular appearance. Aperture somewhat narrow, longer than the spire. Outer lip rather flattened, a little thickened, and occasionally a few obscure denticles thereon. Columella frequently with two or three small folds or tubercles, the beak lightly twisted to the left; canal short and broad. Length, 5.86 mm.; breadth, 2.73 mm.

Type in the Colonial Museum.

Hab. Takapuna, from sand in rock-pockets (R. M.); Plimmerton, Cook Strait.

This species is perhaps nearest to C. pisaniopsis,* Hutton, a Pliocene form.

Crossea glabella, n. sp. Figs. 16, 17.

Shell minute, turbinate, smooth and rather solid. Colour white, somewhat shining. Whorls 3, without sculpture. Spire minute. Sutures distinct, not deep, with a narrow slightly concave depression below and adjoining. Base with broad depression, bounded by a prominent ridge; a second ridge arises from the narrow deep umbilicus; both sweep round to the anterior lip, where they form small well-marked expansions. Aperture subcircular. Inner lip reflected and callused, the latter

[Footnote] * Trans. N.Z. Inst., vol. xvii., p. 314; Macleay Mem. Vol., p. 45, pl. vi., fig. 17.

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spreading across to the outer lip, which is sharp and simple. Height, 1.97 mm.; breadth, 1.94 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton). Found also at Stewart Island (A. H.).

This species, in its smoothness, solidity, and scanty umbilicus, is perhaps nearest to C. carinata,* Hedley, from New South Wales (75–100 fathoms). It appears to be the first record of the genus from New Zealand.

Odostomia impolita, Hutton. Fig. 18.

Rissoa impolita, Hutton, Cat. Marine Moll. N.Z., p. 29 (1873); Proc. Lin. Soc. N.S.W., vol. ix., p. 941. Barleeia impolita, Hutton, Manual N.Z. Moll., p. 81. B. impolita, Hutton, Suter, Proc. Mal. Soc. London, vol. iii., p. 7. Odontostoma impolita, Hutton “Index Faunæ Novæ-Zealandiæ,” p. 74.

The figure offered is derived from specimens in the collection of Mr. Henry Suter (hab. Foveaux Strait). These specimens have 5 whorls (one more than given in the description of the species), including the minute polished apex, the heterostrophe character of which is not very clear, due apparently to its being much buried in the succeeding whorl. The whorls are convex, the last much longer than the spire. Spiral striæ minute, rather more pronounced on the anterior half of the last whorl. Columella plait small, the lip anteriorly slightly effuse.

The types are in the Colonial Museum.

Hab. Stewart Island.

Odostomia proxima, n. sp. Fig. 19.

Shell small, elongated, rather fragile, smooth. White and slightly shining. Whorls 6, somewhat rounded, the last a little longer than the spire; the apical whorl minute, polished and heterostrophe. Sutures deeply impressed, not channelled. Sculptured with longitudinal irregular minute growth-periods, in places slightly pronounced, usually more marked on the spire. These are crossed by minute spiral striæ and scratches, very irregularly spaced, in some almost absent except for a few on the anterior half of the last whorl. Aperture small, ovate, oblique; columella slightly thickened and reflected, the plait not prominent; the lip anteriorly rather effuse. Base narrowly perforate. Length, 3.9 mm.; breadth, 1.8 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

Distinguished from O. impolita, Hutton, by its more rounded

[Footnote] * “Memoirs Australian Museum,” vol. iv., pt. 6 (Thetis), 1903, p. 345, fig. 71.

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whorls and greater number, deeper sutures, irregular sculpture, and comparatively longer spire. It appears to be equally distinct from O. fasciata,* Hutton, a Pliocene form.

Odostomia vestalis, n. sp. Fig. 20.

Shell small, slender, fragile, smooth, and having a somewhat loosely coiled appearance. White and shining. Whorls 6, lightly convex; the last longer than the spire; apical whorl heterostrophe, slightly obliquely tilted. Sutures impressed, shallow and lightly submargined. Sculptured with minute irregular growth-lines, crossed by irregular microscopic striæ, the latter only indicated here and there. Aperture pyriform; columella lightly reflected, the plait small, rather deep within the aperture; anterior lip lightly effuse. Length, 4.31 mm.; breadth, 1.63 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

This form, of which there is but a single example, is nearest to the preceding species; distinguished by its more slender form, more shallow sutures, less rounded whorls, and more rapidly lengthening or loosely coiled appearance.

Odostomia (Pyrgulina) rugata, Hutton.

Odostomia (Parthenia) plicata, Hutton (not of Montford), Trans. N.Z. Inst., vol. xvii., p. 319, pl. xviii., fig. 17 (1884, issued May 1885). Odostomia rugata, Hutton (nom. mut.), Trans. N.Z. Inst., vol. xviii., p. 353 (1885, issued May 1886); “Macleay Memorial Volume,” p. 58, pl. vii., fig. 51.

This species has hitherto been recorded only as a Tertiary fossil. Pliocene: Wanganui and Petane. Found also in the Pareora system. It appears to be rare, both fossil and recent. Of the latter I have seen but three examples, and not in very good condition. I may add—the shell is white, somewhat shining and rather solid; the longitudinal riblets strong, slightly oblique advancing, seventeen to eighteen on the last whorl, feeble or obsolete on the anterior end; spirally adorned with minute dense striæ. Sutures impressed and lightly margined. Columella plait strong. Measurements (approx.): Length, 2.76 mm.; breadth, 1.28 mm. The fig. 51 in the “Macleay Memorial Volume” shows the riblets on the spire-whorls sloping forward, or advancing in a most marked manner. In the examples before me the slope is certainly less than half that shown in this figure.

Hab. Whangaroa Harbour, and Plimmerton, Cook Strait (Mr. A. Hamilton); Takapuna (Rev. W. H. Webster).

[Footnote] * Trans. N.Z. Inst., vol. xvii., p. 320; Macleay Mem Vol, p. 58, pl. vii.,

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Vulpecula (Pusia) hedleyi, n. sp. Fig. 21.

Shell small, shortly fusiform, sculpture minute. Colour greyish-white, occasionally very faintly mottled with brown. Whorls 4½–5, rather flattened; spire short, conical, apex blunt; the last proportionally very large. Sutures lightly impressed. Sculptured with minute spiral grooves and with irregular longitudinal plications, the latter slightly more prominent at the sutures. Aperture oblique, narrow and much longer than the spire. Lip uniformly curved and slightly thickened. Columella white, lightly callused and armed with four plaits, the anterior two more oblique; opposite the latter the columella is lightly swollen. Anterior canal short and broad. Length, 5.42 mm.; breadth, 2.63 mm.

Type in the Colonial Museum.

Hab. Whangarei Heads, dredged in shallow water (Mr. C. Cooper, of Auckland).

Distinguished from other New Zealand species by the feeble longitudinal sculpture and short spire. I have much pleasure in naming this species after Mr. Charles Hedley, of the Australian Museum—a token of appreciation of his invariable kindly assistance.

Trophon (Kalydon) curta, n. sp. Fig. 22.

Shell small, ovate, rather solid, spirally and longitudinally ribbed, the latter strongest and forming prominent nodules on the lines of intersection. Colour whitish, occasionally a brown band on the base, rarely a few ill-defined scattered spots on the periphery. Whorls 6, lightly shouldered. Protoconch of two whorls, smooth except the last half-turn, upon which two small spirals arise. The sculpture consists of ten or eleven, rarely twelve, longitudinal ribs, narrower than the interspaces except when the latter number occurs, then equal or rather wider. Of the spirals there are two on the spire-whorls and six or seven on the last—occasionally three on the penultimate and eight on the last; the anterior spiral not infrequently prominent and the nodules sometimes obsolete. Aperture ovate. Outer lip slightly expanded, the margin occasionally feebly dentate; anterior canal short and somewhat curved. Length, 5.7 mm.; breadth, 2.59 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

Occurs in fair numbers, and appears to be the smallest of the genus recorded from New Zealand.

Rissoa leptalea, n. sp. Figs. 23, 24.

Shell minute, subrimate, slender, smooth, and rather fragile. Colour white, shining and semi-transparent. Whorls 5, having a somewhat loosely coiled, and those of the spire swollen, ap-

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pearance. Apex minute; the last whorl longer than the spire. Without sculpture except the microscopic growth-lines. Sutures impressed and lightly margined. Aperture ovato-subcircular, peristome continuous; the columella and lip broadly expanded, the latter shortly descending. Length, 1.94 mm.; breadth, 66 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

Of this minute form there are only two examples. It is perhaps nearest to R. lubrica,* Suter, from Stewart Island.

Rissoa microstriata, n. sp. Fig. 25.

Shell minute, ovate-elongate, smooth and white. Whorls 5, somewhat swollen at the shoulders, thence gently flattened to the sutures; the latter impressed and lightly margined. Apex minute; last whorl longer than the spire. The sculpture consists of microscopic dense spiral striæ, broken up into variable lengths by the irregular lines of growth. Aperture obliquely broadly ovate; lip slightly thickened, a callus spreading across the body to the columella; the latter thickened and lightly reflected. Length, 2.11 mm.; breadth, 1.08 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

This little shell is perhaps near to Barleeia neozelanica, Suter, while the sculpture, though microscopic, may be compared with Rissoa emarginata, Hutton, a Pliocene form.

Rissoa insculpta, n. sp. Fig. 28.

Shell small, elongate, slightly rimate, rather fragile. White. Whorls 5, lightly rounded; the last whorl much longer than the spire; the apex minute. Sutures impressed. Sculptured with minute spiral threadlets, absent on the apical whorls, about sixteen on the penultimate, and on the last about twenty-five, of which seventeen to eighteen are in front of the aperture. These are crossed by irregular growth-lines, here and there rather pronounced. Aperture broadly ovate, slightly oblique, and the peristome continuous. Columella regularly curved, lightly thickened and expanded, anteriorly a little produced; outer lip slightly thickened and projecting from the whorl above. Length, 2.56 mm.; breadth, 1.35 mm.

Type in the Colonial Museum.

Hab. Whangaroa Harbour (Mr. A. Hamilton).

This form is near to R. foveauxiana, Suter. It differs in

[Footnote] * Proc. Mal. Soc. London, vol. iii., p. 5, fig. iii. (in text).

[Footnote] † Proc. Mal. Soc. London, vol. iii., p. 8, fig. v. (in text, on p. 5).

[Footnote] ‡ Proc. Mal. Soc. London, vol. iii., p. 5, fig. ii. (in text).

– 230 –

being more slender, more feebly rimate, sculpture much finer, sutures less deep, and the whorls less rounded. Perhaps the preceding species, R. microstriata, is next in the order of kinship. For comparison I herewith offer a figure of R. foveauxiana, derived from specimens identified by Mr. H. Suter; also a figure of R. fumata, Suter, derived from a typical specimen (hab. Lyall Bay).

List of Species from Whangaroa Harbour.

Class Gasteropoda.

Marinula filholi, Hutton.

Leuconopsis obsoleta, Hutton.

Cylichna striata, Hutton.

Drillia lævis, Hutton.

Surcula zealandica, E. A. Smith = cheesemani, Hutton (not novæzealandiæ, Reeve).

Mitromorpha substriata, Suter.

" subabnormis, Suter.

" suteri, Murdoch.

Mangilia flexicostata, Suter.

Clathurella sinclairi, E. A. Smith.

" epentroma, Murdoch.

" " var. whangaroaensis, Murdoch.

Daphnella lacunosa, Hutton.

Cancellaria trailli, Hutton.

Trophon duodecimus, Gray.

" plebejus, Hutton.

" curta, Murdoch.

" pumila, Suter = ambiguus Philippi var. pumila, Suter = T. bonneti, Cossmann.

Columbella choava, Reeve.

" huttoni, Suter.

" transitans, Murdoch.

" paxillus, Murdoch.

Taron dubius, Hutton.

Vulpecula rubiginosa, Hutton.

Leiostraca murdochi, Hedley.

Odostomia angasi, Tryon.

" proxima, Murdoch.

" vestalis, Murdoch.

Pyrgulina rugata, Hutton.

Turbonilla zealandica, Hutton.

Cæcum digitulum, Hedley.

Turritella carlottæ, Watson.

" kanieriensis, Harris.

Cerithiopsis terebelloides, von Martens.

" sarissa, Murdoch.

– 231 –

Potamopyrgus antipodum, Gray.

Rissoa huttoni, Suter.

" hamiltoni, Suter.

" subfusca, Hutton.

" " var. micronema, Suter.

" foveauxiana, Suter.

" cheilostoma, Ten.-Woods.

" suteri, Hedley.

" rosea, Hutton.

" neozelanica, Suter (Barleeia).

" leptalea, Murdoch.

" microstriata, Murdoch.

" insculpta, Murdoch.

Rissoina rugulosa, Hutton.

Eatoniella olivacea, Hutton.

Littorina mauritiana, Lamarck.

Risellopsis varia, Hutton.

" var. carinata, Kesteven.

Calyptræa maculata, Quoy and Gaimard.

" scutum, Lesson.

Trichotropis inornata, Hutton.

Crossea glabella, Murdoch.

Natica australis, Hutton.

Scala zelebori, Frauenfeld.

Janthina exigua, Lamarck.

Leptothyra fluctuata, Hutton.

" crassicostata, Murdoch.

Phasianella limbata, Hutton.

Trochus tiaratus, Quoy and Gaimard.

Cantharidus dilatatus, Sowerby.

" sanguineus, Gray.

Monilea egena, Gould.

Calliostoma punctulatum, Martyn.

Ethalia zelandica, Hombron and Jacquinot.

Incisura lytteltonensis, E. A. Smith (Scissurella).

Megatebennus moniliferus, Hutton.

Emarginula striatula, Quoy and Gaimard.

Acmæa pileopsis, Quoy and Gaimard.

Class Pelecypoda.

Barnea similis, Gray.

Saxicava arctica, Lin.

Cardium pulchellum, Gray.

Chione crassa, Quoy and Gaimard.

Tapes fabagella, Deshayes.

Cyamiomactra problematica, Bernard.

Kellya sanguineum, Hutton.

– 232 –

Kellya parva, Deshayes.

Lasea miliaris, Philippi.

Diplodonta zelandica, Gray.

Divaricella cumingi, Adams and Angas.

Cryptodon flexuosum, Montague.

Cuna delta, Tate and May.

Verticipronus mytilus, Hedley.

Cardita aviculina, Lamarck.

Venericardia zealandica, Potiez and Michaud.

" corbis, Philippi.

Lima bullata, Born.

Pecten zelandiœ, Gray.

Philobrya meleagrina, Bernard.

" costata, Bernard.

Barbatia decussata, Sowerby.

Glycymeris striatularis, Lamarck.

Nucula nitidula, A. Adams.

Leda concinna, A. Adams.

Malletia australis, Quoy and Gaimard.

Class Brachiopoda.

Terebratella rubicunda, Sowerby.

Rhynchonella nigricans, Sowerby.

Explanation of Plates VII. and VIII.
Plate VII.
Figs. 1, 2.

Cylichna striata, Hutton.

Figs. 3, 4.

Clathurella epentroma, n. sp.

Fig. 5.

Clathurella epentroma, var. whangaroaensis, n. var.

Fig. 6.

Mitromorpha suteri, n. sp.

Fig. 7.

Drillia lyallensis, n. sp.

Figs. 8, 9.

Cerithiopsis sarissa, n. sp.

Fig. 10.

Leptothyra fluctuata, Hutton.

Fig. 11.

Leptothyra crassicostata, n. sp.

Fig. 12.

Columbella huttoni, Suter.

Fig. 13.

Columbella transitans, n. sp.

Fig. 14.

Columbella paxillus, n. sp.

Plate VIII.
Fig. 15.

Columbella saxatilis, n. sp.

Figs. 16, 17.

Crossea glabella, n. sp.

Fig. 18.

Odostomia impolita, Hutton.

Fig. 19.

Odostomia proxima, n. sp.

Fig. 20.

Odostomia vestalis, n. sp.

Fig. 21.

Vulpecula hedleyi, n. sp.

Fig. 22.

Trophon curta, n. sp.

Figs. 23, 24.

Rissoa leptalea, n sp.

Fig. 25.

Rissoa microstiata, n. sp.

Fig. 26.

Rissoa fumata, Suter.

Fig. 27.

Rissoa foveauxiana, Suter.

Fig. 28.

Rissoa insculpta, n. sp.