﻿78 



OPIIIOCOMA ^THIOPS. 



LIST OF SPECIMENS. 



Whence obtained. 



281 

 282 



283 

 284 

 285 

 286 



1000 

 117G 

 1089 



Ma. 



Florida. 

 Bxy of Cumina. 

 Key West, Fla. 

 Tortillas, Fla. 

 Key West, Fh. 

 Tortuftas, Fla. 

 Cape Florida. 



Florida. 

 Cape Florida. 

 Jererale, Hayti. 

 St. Thomas, W. I. 

 Tortuo;as, Fla. 



Florida. 

 Florida ? 

 Key West, Fla. 



of Comparalice Zoology. 



Prof. Asjassiz. 



Feb. 1856. 

 Mar. 13, '58. 

 Mar. 6, 1858. 

 Ap. 14, 1858. 

 Apr 



1858. 



Smithsonian Institution. 



12+ 



St. Thomas, W. I. 

 Florida Keys. 

 Tortugas, Fla. 

 Tortugas, Fla. 

 St. Thomas, AV. I. 



Capt. Couthouy. 

 T. Lyman. 

 J. E. Mills. 

 J. E. Mills. 

 J. E. Mills. 

 J. E. Mills and 



G. Wurdeman. 

 Prof Agassiz. 

 G. Wurdeman. 

 Dr. D. F. Weinland. 

 A. II. Puise. 

 J. E. Mills. 

 University INIuseum, 



Copenhagen. 

 G. Wui-deman. 



Dr. Holder. 



Dr. Whitehurst. 

 A. H. Riise. 



Ophiocoma sethiops Lutken. 



Ophiocoina cethlops Lutken. Addit. ad Hist. Oph., p. 145. 



Sj)eeial Harks. — Large species. Greatest width of arms more than 

 three times as great as the length of the under arm-plates. Upper 

 arm-spine thickened. 



Description of a Specimen. — Diameter of disk, 31°"°- ; outer edge 

 of mouth-shield to outer corner of opposite mouth-slit, 13°°- ; greatest 

 width of arm without spines, T""'; length of arm, 190""-; distance from 

 outer edge of mouth-shield to inner points of tooth-papillae, to that 

 between outer corners of mouth-shts, 5.6 : 6.3. Eight broad, rounded 

 mouth-papillae to each angle of mouth ; of these the one next the outer 

 one usually broadest ; besides these, a row of three or four minute 

 bead-like mouth-papillfe, just below and outside of the tooth-papillae, 

 with which they might properly be classed. Tooth-papillje about 

 eighteen, irregularly disposed, short, stout, rounded, the two or three 

 lowest bead-like and much smaller than the rest. Teeth four, shaped 



