268 BULLETIN OF THE 



96 fathoms. Station 241, Grenadines, 163 fathoms. Station 246, Grenada, 

 154 fathoms. Station 247, Grenada, 170 fathoms. Station 249, Grenada, 262 

 fathoms. Station 285, Barbados, 13-40 fathoms. Station 292, Barbados, 56 

 fathoms. Bartlett, Station 30, 21° 26' 30" N., 86° 28' 40" W., 51 fathoms. 

 Bartlett, entrance to Port Royal, Jamaica, 100 fathoms. 



Ophioscolex tropicus Ltm. 



Station 195, Martinique, 502| fathoms. Station 266, Grenada, 461 fathoms. 

 Station 211, Martinique, 357 fathoms. Station 273, Barbados, 103 fathoms. 



Young specimens resemble the young of 0. purpureus, but have much more 

 regular mouth-papilla; and flatter arm-spines. 



Ophioscolex glacialis Mull. & Tr. 



Station 336, 38° 21' 50" N., 73° 32' W., 197 fathoms. 



From the following three stations, lying much further to the south, there 

 were specimens having shorter and more numerous mouth-papillae, and much 

 thinner skin. I prefer to consider them as varieties, until additional speci- 

 mens shall prove their final relations. 



Station 185, Dominique, 333 fathoms (young). Station 274, Barbados, 209 

 fathoms (young). Station 293, Barbados, 82 fathoms (young). 



OPHIOTOMA* gen. nov. 



Disk covered by a thick, naked skin, which conceals the small shapeless 

 radial shields. Numerovis mouth-papillae and teeth; no tooth-papillae. Arm- 

 spines hollow, as in Ophiacantha, and smooth. Upper arm-plates present. 

 Two genital openings in each interbrachial space. 



The genus may be called an Ophioscolex with upper arm-plates and hollow 

 arm-spines. 



Ophiotoma coriacea sp. nov. 



Plate II. Figs. 1-3. 



Special Marls. — A. dozen spiniform or tooth-like papillae to each mouth- 

 angle, besides two minute ones under each of the second mouth-tentacles. 

 Five smooth, slender, tapering arm-spines. 



Description of an Individual. — Diameter of disk 16 mm. Width of arm 

 near disk 3 mm. Mouth-angle elongated and bearing about a dozen papilla;, 

 wliereof the outer ones incline to be spiniform, while those within are some- 

 what more flattened and tooth-like. The second mouth-tentacle has also a 

 couple of minute spiniform scales, which stand on the side mouth-shields. 

 Seven or eight stout, flat spear-head-shaped teeth. Mouth-shields wide tri- 

 angular with rounded corners ; length to breadth, 2.5 : 1.5. Side mouth- 



* 6<pis, snake; TOfi-fi, a cut. 



