92 D. C. Danielsseii. 



Drifa hyalina n. g. et sp. 



Generic characteristics. 



The Zoanthodem arborescent, ramous. The main branches 

 thick, and from them shoot out, everywhere, branchlets, closely 

 beset with polyps. The polyps non-retractile, elongate, with well 

 developed posterior body. The stem, the branches, the branchlets, 

 and the polyps, rich in calcareous spicules, of which, the sub-clavi- 

 form is the most predominant. Septa noncalcareous. 



Specific characteristics. 



The Zoanthodem measures up to 80 mm in height. The 

 stem longitudinally grooved, ramous, and 40 mm in circumference 

 at the base. The basal part firm, coriaceous, and not dilated. The 

 stem uniform in thickness throughout, but dilates a little at the 

 summit, where it carries 3 groups of polyps. The main branches, 

 everywhere, rich in branchlets closely beset with polyps. The 

 stem, and all of the branches, rich in calcareous spicules. The 

 polyps measure up to 8 mm in length, are nonretractile, have a 

 long posterior body, and are, as it were, encapsuled in sub-clavi- 

 form spicules. Colour; rose-red. 



Habitat. One specimen. 74° 53' N. L., 15° 55' E. L. 

 Depth, 329 m. Temperature, 2,5 C. Bottom ; Clay, sand. 



Drifa islandica n. sp. 



The Zoanthodem measures up to 60 mm in height. The 

 stem measures, at its base, 45 mm in circumference, is longitud- 

 inally grooved, and, from the basal part to the summit, is furnished, 

 round about it, with closely-set branches. The basal part is cori- 

 aceous, and discoidally dilated. The branches thick, cylindrical, 

 grooved, and are, quite from their root, closely beset, partly, with 

 branchlets, partly, with isolated polyps. The branchlets short, 

 thick, and, everywhere, carry polyps, arranged in closely-set 

 groups having the appearance of clusters of grapes. The stem, 

 the branches, and the branchlets, rich in oalcareous spicules. The 

 polyps are infundibuli-form, and measure 8 — 9 mm in length. The 

 anterior body, towards the tentacular margin, is strongly dilated. 

 The posterior body is long and narrow. The entire body rich in 



