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Volume 11, 1878
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Art. XXXII.—The Sea Anemones of New Zealand.

[Read before the Otago Institute, 11th June, 1877.]

I Should not have chosen such a pretentious title for this paper, but that I wished to include in it descriptions of the three New Zealand sea anemones that have not been found near Dunedin. The sea anemones are animals that can only be described from living specimens; they must be collected, brought home alive, and placed in water before their structure and colour can be seen, and when they are dead there is no known means of preserving them so as to be of any use. To enable observers, therefore, in any part of the colony away from libraries, to describe these animals, I have included in this paper not only descriptions of all the New Zealand species not described in our Transactions, but also an analysis of all the known genera.

Zoantharia-Malacodermata.
Analysis of the Families.
Base adherent at pleasure.
Tentacles all compound Thalassianthidæ.
Tentacles both compound and simple Phyllactidæ.
Tentacles all simple
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Column pierced with loopholes Sagartiadæ.
 Column imperforate.
 Column smooth
  Margin simple Antheadæ.
  Margin beaded Actiniadæ.
 Column warted Bunodidæ.
Base non-adherent.
Lower extremity rounded, simple Ilyanthidæ.
Lower extremity enclosing an air-chamber Minyadidæ.
Thalassianthidæ.
Analysis of the genera (after Milne-Edwards).
The tentacles of one kind only.
The trunk ramified.
The branches long and four-fingered Thalassianthus.
The branches inflated and with scattered papillæ Actinodendron.
The trunk simple.
The trunk with scattered branched filaments Actinaria.
The trunk with groups of rounded papillæ Phymanthus.
The tentacles of two kinds.
The internal with globular papillæ, the external
laciniated Sarcophianthus.
The internal laciniated, the external granulated Heterodactyla.
Phyllactidæ.
Analysis of the genera (after Milne-Edwards).
Compound tentacles on the margin of the disc.
 Column smooth Phyllactis.
 Column warty Oulactis.
Compound tentacles on the disc, between two circles of
simple tentacles Rhodactis.
Sagartiadæ.*
Analysis of the genera (after Gosse).
Tentacles moderately long, slender.
Disc perfectly retractile.
 Column destitute of suckers Actinoloba.
 Column furnished with suckers Sagartia.
 Column clothed with a rough epidermis Phellia.
Disc imperfectly retractile.
 Base annular, parasitic on shells Adamsia.
 Base entire, not parasitic Gregoria.
Tentacles mere warts; set in radiating bands Discosoma.

[Footnote] * Nemactis (Actiniadæ) has also the column pierced.

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Antheadæ.
Analysis of the genera.
Mouth normal.
Tentacles not fully retractile.
 Column long, trumpet-shaped Aiptasia.
 Column normal.
   Tentacles conical Anthea.
   Tentacles fusiform Eumenides.
 Tentacles retractile.
  Tentacles subulate.
   Tentacles sub-equal Paractis.
   Tentacles very unequal Dysactis.
  Tentacles not subulate.
  Tentacles club-shaped
   Mouth elevated Melactis
   Mouth depressed Corynactis.
  Tentacles moniliform Heteractis.
Actiniadæ. Analysis of the genera.
Tentacles not retractile.
 Column short and cylindrical Comactis.
 Column long and conical Ceratactis.
Tentacles retractile.
 Skin smooth.
  Column pierced Nemactis.
  Column imperforate Actinia.
 Skin warted Phymactis.

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Bunodidæ.* Analysis of the genera (after Gosse).
Tubercles conspicuous.
 Disc and tentacles retractile.
  Tubercles of one kind only.
   In the form of rounded warts.
    Irregularly scattered Tealia.
    Arranged in vertical lines Bunodes.
    Arranged in wavy horizontal lines Cereus.
    Arranged in a single horizontal line Hormathia.
   In the form of pointed blisters Cystactis.
  Tubercles of two kinds, viz., rounded warts and erectile pointed papillæ Echinactis.
 Disc and tentacles not retractile Bolocera.
Tubercles obsolete Stomphia.

[Footnote] * Phymactis (Actiniadæ) has also the column warted.

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Ilyanthidæ. Analysis of the genera (after Gosse).
Tentacles of one kind; marginal
 Column thick, pear-shaped.
  Mouth with a papillate gonidial tube Peachia.
  Mouth simple Ilyanthus.
 Column slender, long, worm-shaped
  Invested with an epidermis Edwardsia.
  Without an epidermis Halcampa.
Tentacles of two kinds; marginal and gular.
  Naked; freely swimming Arachnactis.
  Dwelling in a membranous tube; sedentary
    Column inferiorly perforate Cerianthus.
    Column inferiorly imperforate Saccanthus.
Minyadidæ.
Analysis of the genera (after Milne-Edwards.)
Tentacles simple.
  Column smooth Plotactis.
  Column warty Minyas.
Tentacles compound Nautactis.

Descriptions of the New Zealand Species.
Phyllactidæ.

Tentacles of two kinds; simple and compound. Oulactis (M. Edwards).

Column with warts. Compound tentacles placed round the margin of the disc, and outside the simple tentacles.

Oulactis plicatus, sp. nov.

Column cylindrical, not much expanded at the base, about as high as broad; warts arranged vertically in numerous (80 or 100) rows. Brownish yellow, with the warts dirty white. Disc circular, concave; the margin, when expanded, thrown into five deep folds. Crimson, radiately streaked with yellow near the margin. The simple tentacles are conical, about two-thirds of an inch in length, and arranged in two rows. They are transparent, of a violet or greenish colour, and often with opaque whitish transverse bands on the interior aspect. The compound tentacles are in a single row, and about two-thirds the length of the simple tentacles. They are white, and multi-lobed, the lobes being subcylindrical and rounded at the ends.

Height about 2 ½ in. when extended. In rock-pools on the coast, near Dunedin.

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The animal fastens pieces of broken shells, small stones, etc., to its column, and when retracted looks like a small heap of gravel. The compound tentacles are not sensitive. Its nearest ally is Metridium muscosum Drayton, from New South Wales, which Milne-Edwards and Haime have placed in their genus Oulactis. Occasionally some of the lobes of the compound tentacles are pink or orange.

Sagartiadæ.

All the tentacles simple. Column pierced with loop-holes.

Gregoria, Gosse.

Disc imperfectly retractile; column smooth, without suckers, perforated by a few large loop-holes.

Gregoria albocincta, sp. nov.

Column cylindrical, broader than high; yellowish-orange, vertically striped with yellowish-green, each band having a central line of darker green. Disc circular; reddish orange or brick red, radially streaked with darker; margin not beaded; mouth elevated, round; throat ribbed. Tentacles in four indistinct rows round the disc, short, about half the diameter of the disc, conical with blunt points, and often much swollen at the base. Their colour is opaque white. Diameter, about .3 or .4 of an inch.

Common in rock-pools near Dunedin. Sometimes the column is vertically streaked with red and white.

Antheadæ.

All the tentacles simple. Column imperforate, and smooth. Margin of disc not beaded.

Paractis, M. Edwards.

Column naked. Tentacles retractile, subulate, sub-equal.

Paractis monilifera.

Actinia monilifera, Drayton in Dana Expl. Exp., Zooph., p. 136.

Paractis monilifera, M. Ed., Corall. I., p. 248.

Column broader than high, dilated at both extremities, where the exterior surface has moniliform rugosities, of a pale brown with deeper lines. Tentacles longer than the disc, in three rows; ringed with brown and white. Disc yellowish.

Bay of Islands.

Anthea, Johnstone.

Column short, expanded at the base, surface wrinkled. No suckers, warts, nor loop-holes. Tentacles numerous, submarginal, scarcely retractile.

Anthea olivacea, sp. nov.

Column short, broad, and expanded at the base, slightly horizontally wrinkled; of an olive green colour down to the base. Disc circular, concave, with the mouth slightly raised; of a darker green than the column and

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tentacles; mouth plaited, pink inside. Tentacles in four rows, much longer than the disc, tapering, not perfectly retractile, of the same colour as the column.

Diameter, about half an inch.

In rock pools near Dunedin.

In small specimens the tentacles are quite retractile.

There is also a variety in which the column is longitudinally streaked with yellow.

Actiniadæ.

All the tentacles simple. Column imperforate, smooth. Margin of the disc beaded.

Actinia, Linn.

Column short, much expanded at both ends, the margin separated by a broad but shallow fosse from the tentacles. Tentacles subequal, retractile.

Actinia (?) thomsoni.

Actinia (?) thomsoni.

Actinia thomsoni, Coughtrey, Trans. N.Z. Inst. VII., p. 280.

Port Chalmers.

I have not seen this species, and as Dr. Coughtrey has not mentioned any marginal beads, I doubt its being a true Actinia.

Actinia (?) striata.

Actinia striata, Quoy and Gaim., Voy. Astrol., IV., p. 164.

“Small, cylindrical, elongated; pale blue striated with reddish; tentacles numerous, acute, yellowish; mouth brownish yellow. Height, half an inch. Bay of Islands.”

I have not seen this species, and cannot say to what genus it should be referred.

Phymactis, M. Edwards.

Column with suckers, but no loop-holes; margin of disc beaded.

Phymactis polydactyla, sp. nov.

Column short, cylindrical; suckers raised on warts, crowded at the upper part of the column, but arranged in vertical rows lower down; whitish, with the warts olivaceous brown. Disc circular, concave, of a deep crimson; a row of round white beads round the margin. Tentacles numerous, in three rows, conical, much shorter than the diameter of the disc; the exterior rows generally pink, the interior yellowish, or whitish, or greenish; sometimes with opaque white transverse bands interiorly.

Diameter, about one inch.

In rock pools near Dunedin.

Phymactis inconspicua, sp. nov.

Column cylindrical, as long or longer than broad, with vertical rows of suckers on warts. Olive brown above, passing into yellowish white below;

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the warts brown, often pale-centred. Disc round, concave, olive brown, sometimes marked with grey, marginal row of beads white.

Tentacles moderate, nearly or quite equal to the diameter of the disc, quite retractile; olive brown margined with white, and often white-spotted.

Diameter about .3 of an inch.

In rock pools near Dunedin, abundant.

In some the warts are obsolete near the base, owing to the animal having lived in a narrow crack in the rocks. There is also a variety in which the tentacles are purplish grey, and the disc even is sometimes the same colour.

Minyadidæ.

Base not adherent; lower extremity enclosing an air-chamber. Floating on the ocean.

Minyas, Cuvier.

Tentacles simple; column warty.

Minyas (?) viridula.

Actinia viridula, Quoy and Gaim., Voy. Astrol., IV., p. 161., pl. 13, f. 15–21.

Minyas ? viridula, M.Ed., Corall. I., p. 229.

Shape variable, discoid or elongated, longitudinally ribbed. Ribs twenty, tuberculated, and with a median row of white suckers. Mouth plicated. Greenish, mixed with bistre upon the ribs, and of a deeper green in the intervals.

Pacific Ocean, between New Zealand and the Friendly Islands.