The Norwegian North-Atlantic Expedition. 91 



and quadruplets, are visible. In the body of the polyps, the 

 fusi-form is the most frequent. Colour; strong straw-yellow. 



Habitat. Several specimens. 69° 46' N. L., lé° 15' E. L. 

 Depth, 1187 m. Temperature, 0,7 C. Bottom. Sabulous clay. 



Duva cinerea n. sp. 



Specific characteristics. 



The Zoanthodem measures up to 28 mm in height. The 

 stem is cylindrical, grooved, and measures about 20 mm in circum- 

 ference at the base but diminishes in thickness up towards the 

 summit at which point it ramifies into 2 branches, which again 

 ramify into branchlets, each carrying groups of polyps. The 

 basal part is thick, firm, and somewhat dilated. Immediately 

 above the basal part, and up to its summit, the stem is, round 

 about it, furnished with short, thick, branches, placed pretty far 

 apart from each other and, of these, several, quite at their root, 

 ramify into two, which again ramify into numerous branchlets, 

 each carrying 6 — 7 closely-set polyps; other branches — and these 

 the greater number — ramify, a couple of millimetres beyond 

 their roots, into many short, and crowded branchlets, each of which 

 carries a similar number of polyps. These are chalice-formed, and 

 measure 3 mm in length; they have a short, narrow posterior 

 body, in which the spicules arrange themselves in longitudinal 

 series. The aboral side of the tentacles is furnished with spicules 

 which, upon the lowest half-part, are placed longitudinally, and, 

 on the uppermost part, transversally. In the basal part, complex 

 stellates, and pennate, dilated, spicate fusees are the most frequent 

 spicular forms. The lowest part of the stem is poor in spicules. 

 The remainder of the stem and, also, the branches with their 

 ramifications, are devoid of spicules. The body of the polyps is 

 rich in spicules, which appear, principally, in the fusi-form. The 

 colour of the stem, and the branches, is greyish-green; the polyps 

 greyish. 



Habitat. One specimen. About 69° 14' 1" N. L., 14° 42' 50" 

 E. L. Depth, 548 m. Temperature, 4,0 C. Bottom ; Clay, shingle. 



