232 BULLETIN OF THE 



Ophiothamnus vicarius Ltm. 



Ophiothamnus vkariics. Bull. Mus. Comp. Zool. I. No. 10, p. 342. 1869. 111. Catal. 



Mus. Comp. Zool. No. VI. PI. II. Figs. 8, 9. 



Station 5, 152-229 fathoms, 5 specimens. Station 45, 101 fathoms, 1 spe- 

 cimen. 



Ophiocamax histrix sp. nov. 



Plate I. Tiga. 13 - 15. 



Special Marks. — Mouth-papillae numerous and spine-like. Disk covered 

 •with rather large and very irregular plates, and radial shields sparsely beset 

 with stout thorny spikes. 



Description of an Individual. — Diameter of disk 11 mm. Width of arm close 

 to disk, without spines, 3.5 mm. About thirty long, spiniform, equal mouth- 

 papillae to each angle, arranged in clusters. Mouth-shields small, slightly 

 swollen, with a long lobe projecting towards the interbrachial space, a blunt 

 angle inward, and lateral corners rounded ; on the outer portion are a few 

 grains. Side mouth-shields very large, meeting broadly within, and connected 

 with the first under arm-plate. Under arm-plates much broader than long, 

 with an obtuse angle within, outer edge slightly curved, and truncated angles 

 on the lateral sides. Side arm-plates large, and projecting, nearly meeting be- 

 low at base of arm, but not above. Upper arm-plates large, slightly swoUen, 

 with the outer edge, which is much broader than the inner, irregularly curved. 

 Disk thick and somewhat swollen, with deep constrictions on the interbrachial 

 sijaces, covered with coarse, angular, irregularly shaped plates, carrying a few 

 short, pointed, thorny spikes. Radial shields large, and irregularly angular, 

 wider without than within, where they are separated by one or more wedge- 

 like scales ; length to breadth 3.5 : 2.5 mm. Eight long, thorny, glas.<«y arm- 

 spines, the uppermost being as long as six arm-joints, and the second as four, 

 whence they diminish rapidly downward to the lowest, which is scarcely as 

 long as a joint. "Three long, stout, bluntly pointed, thorny tentacle-scales to 

 each pore. Color in alcohol, pale bluish-gray. 



Sigsbee, off Havana, 175 fathoms, 7 specimens. 



Ophiothrix violacea Mull & Tr. 



Ophiothr ix violacca Syst., Ast^rid. p. 115. 1842. 



Ophiothrix caribcea Ltk., Vidensk. Meddelelser, Jan. 1856. 



Ophiothrix Kroyeri Ltk., Vidensk. Meddelelser, Jan. 1856. 

 Station 11, 37 fathoms, 8 specimens. Station 12, 36 fathoms, 3 specimens. 

 Station 32, 95 fathoms, 1 specimen. Station 38, 20 fathoms, 2 specimens. 

 Station 39, 14 fathoms, 10 specimens. Station 45, 101 fathoms, 1 specimen. 

 Bahia Honda, 2 specimens. 



Ophiothrix Suensonii Ltk. 

 Ophiothrix Siiensonii, Vid. Mcdd. p. 16. 1856. 

 Station 45, 101 fathoms, I specimen. 



