﻿26 



OPHIURA L^VIS. 



shape accordingly ; length to breadth (sixth plate), 1.1 : 2.8. Disk 

 evenly and finely, but not very closely, granulated throughout, except 

 side mouth-shields, and a few naked scales at base of arm ; about 80 

 grains to a square mm. Arm-spines very characteristic, eight (rarely 

 nine) rounded, slender, slightly tapering, almost as long as joints, of 

 even length and size ; length to that of under arm-plate, .9 : 1. Liside 

 tentacle-scale oblong, with a rounded end, rather delicate ; length to 

 that of under arm-plate, .7:1; outside scale of about the same width, 

 but shorter, and cut off obliquely at the end. Color, in alcohol : above, 

 disk dull greenish-gray round edges, fading to dull yellowish-brown 

 towards centre ; ai*ms Ijanded with darker and lighter shades of duU 

 greenish-gray, each band occupying from two to five joints ; outer edges 

 of ujiper arm-plates finely marked with short, longitudinal lines of 

 brown ; below, uniform pale straw-color. 



This delicate and elegantly formed species may at once be distin- 

 guished from other Ojihiuroi with equal arm-spines and covered radial 

 shields, by its long, rounded, slender arm-spines. 



LIST OF SPECIMENS. 



Ophivira laevis Lyman. 



Stella Icevis Rondelet. De Pise. Mar., p. 120. 1554. 

 Stella LUMBniCALis ; S/f//a tefis LiNCK. De Stel. Mar., p. 46. 1733. 

 ? Stella lumbrkalis longicauda Linck. De Stel. Mar., p. 47, tab. XI. fig. 17. 1733. 

 Ophiura lacertosa Lamk. Syst. Anim. s. Verteb., p. 351. 1801. 

 Ophioderma longicauda Mull. & Teosch. Syst. Asterid., p. 8G. 1842. 



LIST OF SPECIMENS. 



"Whence obtained. 



Museum of Comparative Zoiilngy. 



411 



426 

 427 



Azores. 

 Spain. 

 Alger. 



Jardin des Plantes. 



Dried. 

 Alcoholic. 



