Stuckey. — A Review of the New Zealand Actiniaria. 389 



Distribution. — Of the genus — Mediterranean, Red Sea, Indian Ocean, 

 Atlantic, Tierra del Fuego, New Zealand, Pacific, China Sea. Of the species 

 — Island Bay, Ohiro Bay. 



Genus Tealidium (Hertwig). 



ParactidcB having the tentacles placed in several rows of uniform size 

 in the same row, and having the body-wall covered with fine papilla?. All 

 mesenteries perfect and gonophoric except the directives. (Hertwig's 

 definition modified.) 



This genus was erected by Hertwig for the reception of a form found 

 in the " Challenger " material, a form which agreed with Paractis except 

 in the warty character of the body- wall. In Hertwig's species (Tealidium 

 cingulatum) the wall bulges outwards, forming a girdle below the tentacles. 

 This he attributes to the great development of the sphincter. In the species 

 described below the same thing is seen, though I have no direct evidence 

 that it arises from the cause ascribed by Hertwig. Probably this feature 

 may come to be regarded as of generic value. 



11. Tealidium cinctum (sp. nov.). 



• Pedal-disc. — Adherent in cleft of rock, making the animal difficult to 

 remove. The mesoglcea is fibrous, and contains numerous lacuna?. 



Column. — The upper part is brownish in colour, the lower part dirty- 

 white. The upper part is covered with verrucae in vertical rows ; small 

 shells, &c., are attached to these verrucse. The lower part, which is im- 

 bedded in a cleft of the rock, is without the verruca>, and is channelled by 

 fine furrows. The verrucse act as suckers, by which the animal covers itself 

 with bits of shell and other debris. In full expansion the column bulges 

 outwards, forming a circular swelling just under the bases of the tentacles. 

 The ectoderm is somewhat irregular, and there appear here and there spaces 

 between the cells. The nerve-layer is feebly developed. The mesoglcea 

 is well developed, and contains small lacunae. It runs into the ectoderm 

 in the form of conical papillae. 



Tentacles. — These are 48 in number, apparently in four cycles. Length, 

 about 16 mm. They are pellucid, with a mauve-pink shade. There are 

 white transverse markings on the inner sides. The ectoderm is of the same 

 irregular character as that of the column, but the intercellular spaces are 

 smaller. The nervous layer is well developed, being several cells deep. 

 There is a fair development of the ectodermal muscles, but the endodermal 

 musculature is w^eak. The lumen of each tentacle is filled with what appears 

 to be hypertrophied endoderm. 



Oral Disc. — The colour is pale brown, with a ring of green round the 

 mouth, and a broken ring of yellow round the green. The histological 

 features resemble those of the tentacles. 



Sphincter Muscle. — This is mesogloeal and diffuse, extending through 

 the whole wall of the column. There is, however, a decided thickening 

 under the edge of the disc, and this probably constitutes the true sphincter. 

 Hertwig describes a similar sphincter in Antholoba reticulata. 



Mesenteries. — There are 24 pairs, 2 pairs being directives. All reach 

 the stomodaeum, and are about equal in development. All are gonophoric 

 except the directives. I have made this a generic feature, since Tealidium 

 cingulatum (Hertwig), the only other known species, has all its mesenteries 

 perfect and gonophoric (? directives). The musculature is well developed. 

 (Plate XXIV, fig. 2.) 



