The Norwegian North-Atlantic Expedition. 93 



spicules consisting, principally, of foliaceous sub-clavates, but, up 

 towards the tentacular margin, there is, between the tentacles, a 

 triangular space devoid of spicules. The tentacles well furnished 

 with spicules of variable form, whilst, the pinnules are devoid of 

 them. The zoanthodem is, everywhere, closely beset with 

 nematocysts. Colour ; light chestnut-brown, with intense dark-brown 

 pinnules. 



Habitat. One specimen. 64° 36' N. L., 10° 22' W. L. 

 Depth, 547 m. Temperature, 0,3 C. Bottom; Dark-grey clay. 



Nannodendron elegans*) n. g. et sp. 



Generic characteristics. 



The Zoanthodem arborescent. The stem hard, grooved, from 

 the base to the summit beset, round about it, with hard, stiff, lob- 

 ate, clavi-form branches that close in, compactly, to each other, 

 and are, everywhere, richly beset with polyps. The basal part 

 hard, coriaceous, and discoidally dilated. It, as well as the stem 

 and the branches, is rich in spicules. The polyps retractile, cy- 

 lindrical, and rich in spicules. The tentacles about half the length 

 of the body of the polyp, and their entire aboral side richly fur- 

 nished with spicules. In the stem, and the branches, zooids, 

 everywhere. The gullet of the polyps furnished with spicules. 



Specific characteristics. 



The Zoauthodem measures up to 35 mm in height. The 

 stem cylindrical, hard, longitudinally grooved; measures about 

 40 mm in circumference at the base, diminishing gradually, a 

 little, in thickness, up towaids the summit at which point it 

 ramifies into 3 — 4 branches; it is beset, round about it, from the 

 base to the uppermost extremity, with clavi-form, lobate, hard 

 branches which are, everywhere, furnished with polyps. The 

 branches close compactly together and, almost, quite cover the 

 stem. The basal part hard, coriaceous, and discoidally dilated. 

 The polyps cylindrical, with a rather short posterior body. In 

 the stem, and the branches, zooids, everywhere, also, over the 

 entire Zoanthodem, nematocysts. The spicules of the basal part 

 form, most frequently, bi-stellates and complex stellates. On the 



*) ravvoç, a dwarf, ôevôpov, a tree. 



