The Norwegian North-Atlantic Expedition. 89 



Duva Spitzbergens n. sp. 



This has so much in common with Duva arborescens that it 

 is almost impossible to distinguish them, from each other, macro- 

 scopically, but if a powerful magnifying glass is used it will im- 

 mediately become apparent that, whilst Duva arborescens, has, 

 everywhere, calcareous spicules in the zoanthodem, Duva spitz- 

 bergensis is devoid of them, in most of its parts, and, therefore, 

 approaches more to Duva rosea, m. but from which it is dis- 

 tinguished, however, in several respects. 



Specific characteristics. 



The Zoanthodem measures up to 110 mm in height. The 

 circumference of the stem, at the base, is 45 mm; it is longitud- 

 inally grooved, cylindrical, and, from its basal part to the summit is 

 encompassed by branches; the basal part smooth; the branchlets bare 

 and strongly ramified; the outermost branchlets carry 3 — 6 polyps. 

 In the basal part of the stem, minute dispersed spicules, appearing 

 as spicate fusees with pennate dilations, and as cruciform quad- 

 ruplets. The entire remainder of the stem, with its branches and 

 branchlets, devoid of spicules. The polyps cylindrical, with 

 long posterior body. The body of the polyps furnished with 8 

 double series of spicules, of which, the 2 series on the ventral 

 side are very ' short, whilst, the 2 series on the dorsal side occupy, 

 almost the entire length of the polyp. The spicules of the body 

 appear as spicate fusees, spicate sub-clavates, and cruciform quad- 

 ruplets. The tentacles have, on the base of their aboral surface, 

 spicules which are a continuation of the spicules of the body. 

 Colour ; pale yellowish red. The polyps almost pellucid, with a 

 faint reddish tinge imparted from the gullet. The tentacles darker 

 in colour. 



Habitat. One largish, and one smaller specimen. 78° 48' 

 N. L, 8° 37' E. L. Depth, 199 m. Temperature, 1,1 C. Bot- 

 tom; Clay. 



Duva violacea n. sp. 



Specific characteristics. 



The Zoanthodem measures up to 80 mm in height. The 

 stem ramifies, at a little distance above the base, into two parts, 



