96 D. C. Danielssen. 



Nephthya polaris n. sp. 



Specific characteristics. 



The Zoanthodem measures up to 35 mm in height, bushy. 

 The basal part, discoidally dilated, hard, very calcareous. The 

 stem cylindrical, its lowest half-part free of branches but closely 

 beset with foraminifera. The branches thick, richly beset with 

 polyps, so arranged that each branch forms, almost, a sphere. The 

 stem, and the branches, rich in spicules. The polyps shoot out 

 direct from the branches; measure 4 mm in length; infundibuli- 

 form with short posterior body. The tentacles, 1,5 mm long, thick, 

 and somewhat truncated. The body of the polyps, especially on 

 the dorsal side and on the tentacles, is very rich in calcium. The 

 pinnules noncalcareous. In the basal part, and lower part of the 

 stem, the bi-stellate is the most frequent form. In the rest of the 

 stem, and the branches, the bi-stellate is much less frequent, and in 

 these situations, plainer almost fusi-form spicules are the most 

 frequent. In the polyps; clavates, and sub-clavates, are the most 

 frequent forms. Colour; the stem, branches, polyp-body, and the 

 lowest half-part of the tentacles, faint brownish red. The upper 

 half-part, also the pinnules, dark chestnut-brown. 



Habitat. A few very small specimens. 70° 41' N. L., 

 10° 10' W. L. Depth, 481 m. Temperature, 0,3 C. Bottom; 

 Brown clay, stones. Two specimens. 71° 42' N. L., 37° l' E. L. 

 Depth, 271 m. Temperature, 1,4 C. Bottom; Clay, stones. Four 

 specimens. 74° 8' K L., 31° 12' E. L. Depth," 269 m. Tem- 

 perature, 0,4 C. Bottom; Clay. 



Gersemiopsis arcticas n. g. et sp. 



Generic characteristics. 



The Zoanthodem arborescent. The stem ramous. The bran- 

 ches ramify into several branchlets. The sarcosoma not plentiful. 

 The ducts wide. The polyps, cylindrical, with long posterior 

 body, non-retractile. The gullet furnished with two fillet-formed 

 protuberances (flaps). The stem, branches, branchlets, and polyps, 

 richly furnished with spicules, of which, subclavates and clavates 

 are the most prominent. 



