86 D. C. Danielssen 



separated by a narrow sarcosoma. The polyps non-retractile, well 

 developed, and richly supplied with spicules, especially on the 

 whole of the dorsal side. The entire zoanthodem is, either, rich in 

 spicules, or the greater part of the stem and, also, the branches 

 and branchlets, are devoid of them. Septa non calcareous. 



Subdivisions. 



A. The entire Zoanthodem containing spicules. To this sub- 

 division pertain: 



Duva arborescens n. sp. 



— aurantiaca n. sp. 



— frigida n. sp. 



— glacialis n. sp. 



B. The greater part of the stem and the branches with their rami- 

 fications, devoid of spicules. To this subdivision pertain: 



Duva spitzbergensis n. sp. 



— violacea n. sp. 



— flava n. sp. 



— cinerea n. sp. 



Duva arborescens n. sp. 



Specific characteristics. 



The Zoanthodem measures up to 120 mm in height ; and the 

 stem 60mm in circumference, at the base. Grooved longitudinally; 

 ramous, from a point commencing about 20 mm above the base 

 and thence to the summit. The basal part is coriaceous and not 

 particularly dilated. The branches bare, much ramified; the ex- 

 treme branchlets carry 3 — 5 polyps. The stem, the branches, the 

 branchlets, and the stalks (the extreme ramification), furnished with 

 calcareous spicules of variable forms. The polyps elongate, cy- 

 lindrical, with a rather long posterior body. The entire body of 

 the polyp furnished with 8 double series of spicate, partly, fusi- 

 form, partly, sub-claviform spicules, amongst which a few cruci- 

 form quadruplets visible. The tentacles devoid of spicules. Colour; 

 yellow, shading a little towards red. 



Habitat. A small specimen; 74° 53' N. L., 15° 55' E. L- 



