II 



Professor Verrill records in »Proceedings of United States National Museums for 1879, p. 199, an Alcyonarian, to 

 which he has given the name of Alcyonium multiflorum, and that would seem to approximate Duva rosea rather closely; but 

 to judge from his very brief description, unaccompanied too, as it is, by figures, we are disposed to regard the animal as a 

 form specifically distinct from Duva rosea, though it certainly will have to be referred to the genus Duva, since, for divers 

 reasons, it does not admit of being classed under the genus Alcyonium. 



Duva pellucida, n. sp. 



Tab. III, figs, 1— 11. 



Specific Character. 



The zoanthodeme tree-like. The trunk 14 — 15 mm. high and 4 mm. broad at the base, branched, and with the 

 basal part dilated. At the extremity of each branch, a group of from 5 to 7 short, bell-shaped polyps, having on the anterior 

 part of the body 8 series of elongate, thorny — part straight, part curved — spindleshaped spicules, — produced on to the ten- 

 tacles. The branches and the upper half of the trunk without calcareous deposit. The basal part and the lowermost part of 

 the trunk calcareous. The spicules occur here, as a rule, as simple double stars. The trunk, the branches, and the polyps 

 hyaline, pellucid, and over the whole surface densely beset with nematocysts. 



Duva puler a, n. sp. 



Tab. III, figs. 12—24. 



Specific Character. 



The zoanthodeme greatly branching. The trunk 12 mm. high, and 5 mm. broad at the base. The branches as a rule 

 ramifying, and each branch or branchlet having at the extremity from 3 to 5 polyps. The polyps exceedingly ventricose, 

 with retractile tentacles. The whole body of the polyps beset with thorny spicules, part spindleshaped, part clubshaped. The 

 tentacles furnished with a series of transversely placed flat spicules. The lower half and basal part of the trunk abundantly 

 provided with simple and complex double stars; the upper half, as also the branches, without spicules. Colour a milky white. 



