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. Inside 

 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 ; arms banded with darker and lighter shades of dull 

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

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

 bro^^^l ; below, uniform pale straw-color. 



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

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

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



LIST OF SPECIMENS. 



Catalogue 

 Number. 



I Number 

 of Spec. 



Locality. 



When 

 Collected. 



Whence obtained. 



Nature of 

 Specimen. 



Museum of Comparative Zoology. 

 107 I 49 I 1 I Brazil. | | Univ.Mus. Copenhagen.] Alcoholic. 



Smithsonian Institution. 

 1002 I . . I 1 I Brazil. I | Univ.Miis. Copenhagen.! Alcoholic. 



Ophiura Isevis Lyman. 



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

 Stella lumbricalis ; Stella Icevis Linck. De Stel. Mar., p. 46. 1 733. 

 ? Stella lumbricalis loiu/icauda Lixck. De Stel. Mar., p. 47, tab. XL fig. 17. 

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

 Ophioderma longicauda Mull. & Trosch. Syst. Asterid., p. 86. 1842. 



1733. 



LIST OF SPECIMENS. 



