R é s u m é. 



Duva, g. n. 



Generic Character. 



1 he zoanthodeme having the form of a tree, very much subdivided. The basal part of the trunk broad. The 

 mainbranches long, soft, flexible, and either dividing into small subsidiary branches, these again into divers branchlets — each 

 bearing at the extremity several polyps — or remaining undivided, but in that case, too, bearing at the extremity an as- 

 semblage of polyps, in part united at the base, in part separated by a slender coenenchym. The polyps non-retractile, short 

 but well developed, furnished with long, spindle-shaped, thorny spicules. The branches and small subsidiary branchlets without 

 any calcareous deposit. The spicules on the trunk occurring partly as short multiradial spindles, partly as simple double stars, 

 in neither case visible to the naked eye. The septa without any calcareous deposit. 



Duva rosea, n. sp. 



Tab. I, figs. i — 10. Tab. II, figs. i— 12. 



Specific Character» 



The zoanthodeme reaching 180 mm. in height. The trunk, 70 mm. in circumference at the base, greatly branching, 

 and grooved longitudinally. The basal part dilated, rather thick. The branches multiramous, with the outermost branchlets 

 bearing each at its extremity from 4 to 7 polyps, united in pairs at the base. The branches all without calcareous deposit. 

 The polyps cylindric, furnished with long, thorny, spindleshaped spicules on the anterior half of the body. The tentacles 

 without spicules. The inferior part of the trunk abundantly provided with spicules, the uppermost but sparingly. Colour 

 a pale rosy red. 



