MUSEUM OF COMPARATIVE ZOOLOGY. 115 



The coenosarc on the back part of the branch shows transverse canals more 

 transparent than the rest, in the spaces between successive polyps. 



This species is very common, having been obtained in twenty-three stations, 

 in depths ranging from 45 to 878 fathoms, off Havana, Santa Cruz, Montserrat, 

 Martinique, St. Vincent, the Grenadines, Granada, and Barbados. 



Antipathes (Bhipidipathes) tristis Duch. 



Plate III. Fig. 10. 



Of this delicate species there are several good specimens, 3 or 4 inches high ; 

 the branches are very slender; anastomoses among them are not plentiful, they 

 are more properly adherences. The spines are sharp, triangular. (Plate III. 

 Fig. 10.) The polyps are small, have short digitiform tentacles, and moder- 

 ately prominent mouth ; the two lower tentacles are sometimes laid around 

 the mouth, as figured in A. spiralis. 



Range from 45 to 226 fathoms, in eight stations, off Santa Cruz, Montserrat, 

 Martinique, St. Lucia, and Barbados. 



Antipathes thyoides Pourt. n. sp. 



« 



Plate III. Figs. 17 and 31. 



Densely flabellate, but entirely without adherences of the branchlets, which 

 ramify from the sides of the branches without showing any regular pinnate 

 arrangement. The finer branchlets show an apparent succession of swellings, 

 produced by the larger spines surrounding the polyj)S. The spines are of the 

 cylindrical type, unequal, with a few very long ones about the proximal end of 

 every polyp. ' (PL III, Fig. 17.) The polyps are of the sessile type, with 

 very short tentacles. (PI. III. Fig. 31.) 



The largest specimen spreads 20 cm. in height, and 30 cm. in breadth. 



In 124 fathoms, off St. Vincent. 



Antipathes picea Pourt. n. sp. 

 Plate III. Figs. 9 and 39. 



Branching, flabellate, the branches ^ith four rows of pinnules, two of which 

 remain generally small and simple, while the two others develop more and 

 give the pinnate appearance to the branches. These larger branchlets are 

 again beset with small pinnules on one side. This is precisely the same 

 arrangement as in A. tanacetum, from which it differs by the spines, which 

 are in the latter sj^ecies about three times as long as broad at the base, while in 

 A. jpicea they are about as high as broad. The polyps are small, with a large 

 spherical buccal knob and flattened tentacles, with slightly incised border ; 

 when strongly contracted they appear globular. They are thickly beset with 

 bundles of lasso-cells. On the thicker branches the polyps are rare, and have 



