ACTINIARIA ig- 



I 



verrucae are present, the papillae are namely here, as I have stated before, tliickenings of the mesogloea. 

 If this species really is a Paractid, it must have a new genus name. I provisionally propose Paratealidiutn. 



Tealidium jungerseni n. sp. 



Diagnosis: Basal disc ver}- thin. Body-wall in the distal part with rather distinct longitudinal 

 furrows. Spliincter now concentrated, now more elongated, not longitudinally stratified. Tentacles 48, 

 conical, not longitudinally sulcated, with somewhat thickened mesogloea on the outer side at the base. Long- 

 itudinal muscles of the tentacles rather well developed also on the outer side, though weaker here than on 

 the inner side, with closely packed, palisade-shaped folds. Actinopharynx very short with about 6 longitudinal 

 furrows on each side. Pairs of mesenteries 24, of which at least 6 pairs perfect. All mesenteries fertile. Nenia- 

 tocysts in the ectoderm of the tentacles very sparse, 36x2,5 — 3^, its spirocysts verj^ numerous, 19x2 — 

 46 X 3 ;/. Nematocysts of the stinging battery on the outermost tentacles very large, 106 — 134 x 11 — 15 {i. 

 Typical nematocysts of the actinopharynx partly 29 — 30 X 3 //, partly 20 — 25 X 2,5 ft. Nematocysts with 

 discernible basal part to the spiral thread, 26 — 36 X 4 — 5 //. 



Colour? 



Dimensions: Height of the largest specimen 0,3 cm, breadth 3,5 x 2 cm. Inner tentacles 

 0,5 cm long. 



Occurrence: Danmark Strait. 64°34' N. 3i°i2' W. 1300 fms. Bottom temp. +1,6° (Ingolf-Kxp. 



St. 11) 3 sp. 



Davis Strait. 59°i2' N. 5i°05' W. 1870 fms. Bottom temp. + 1,3° (Ingolf-Bxp. .^Vl 



St. 38) I sp. 



Exterior aspect: The pedal disc is very wide. The body is in contracted state disc-like, in one 

 specimen a little elevated in the middle (in the sphincter region), in the specimen from the station 38 the body 

 forms a low cone. The column is provided with very numerous, closely packed, small mesogloea-papillae, all 

 of about the same size, towards the distal end they are somewhat scarcer and seem, at least partly, to be 

 lacking in the region of the sphincter (in the capitular region). In the two largest specimens this region was 

 provided with some irregular protuberances, which may possibly have arisen by the strong contraction. 

 The column is besides longitudinally sulcated, the furrows correspond to the insertions of the mesenteries 

 and appear most distinctly in the distal, not involved part of the body. Sometimes transversal furrows 

 are to be observed, they are certainly due to the contraction of the animals. The tentacles are thick at the 

 base, tapering towards the apex, not longitudinally sulcated, and incurvate. In one specimen — I have exam- 

 ined two specimens concerning the tentacles — the tentacles were a little swollen at the outside of the base. 

 The number of tentacles was 48, probably (6 + 6 + 12 + 24). ^^^ oral disc is ver>- wide and thin, I cannot 

 determine its structure as it was strongly extended, and its ectoderm lost. The actinopharynx is very short 

 and provided with about 6 longitudinal furrows on each side of the sagittal axis. The two s}'mmetrically 

 placed siphonoglyphes are provided with aboral prolongations. 



Anatomical description: The ectoderm of the column is lost, but to judge from fragments it 

 seems to have been low. The mesogloea is in the greater part of the column rather thin and provided with 



