﻿OPIIIURA CINEREA. 



29 



with specks of umber l^-own on disk, and bands of the same on arms ; 

 below, nearly white. The upper arm-plates are usually not broken 

 until the animal has a disk at least 12'""-. 



This species differs from others with radial shields and unequal spines, 

 as follows : from O. rubiciinda, in position and shape of mouth-shields ; 

 from 0. 23aname7isis, in having broken upper arm-plates, and in shape 

 of mouth-shields ; from 0. sqiiamosissima, in having upper arm-plates 

 broken, instead of scaly. 



A comparison of the original of Miiller & Troschel in the Vienna 

 Museum shows that their specimen is a young one of this species. Dr. 

 LUtken's name Antillarum must therefore be dropped. 



LIST OF SPECIMENS. 



104G 

 904 

 1013 

 1061 

 1072 

 1073 

 1106 

 1178 



Museum of Comparative Zoologi/- 



Tortugas, Fla. 



Tortugas, Fla. 



Tortugas, Fla. 



Florida. 



Florida. 



Hayti. 



St. Thomas, W. I. 



Florida. 



Cape Florida. 



West Indies. 



Jereraie ; Hayti. 



Florida, 



Florida. 



Gulf of Mexico, south 



of Vera Cruz. 

 Hayti. 



]\ni. 1.5-20, '5S 

 Early Mh. '58 

 Feb. 1856. 



Smithsonian Institution. 



Tortugas, Fla. 



Garden Key, Tortugas. 



Key Biscayne, Fla. 



Aspinwall. 



St. Thomas, W. I. 



St. Thomas, W. I. 



St. Thomas, W. I. 



Florida. 



St. Thomas, W. I. 



J. E. Mills. 

 J. E. Mills. 

 Tlieo. Lyman. 

 Prof. Agassiz. 

 Prof Acassiz. 

 Dr. D. F. Weinland. 

 A. H. Riise. 

 J. E. Mills. 

 G. Wurderaan. 

 LTniv.Mus.Cop'hagen 

 Dr. D. F. Weinland. 

 Prof Agassiz. 



G. Wurdeman. 

 S. S. Haldeman. 

 Dr. D. F. Weinland. 



Capt. AVoodbury. 

 G. Wurdeman. 

 G. Wurdeman. 

 Rev. T. PoweU. 

 A. H. Riise. 

 A. H. Riise. 

 A. H. Riise. 



A. H. Riise. 



Alcoholic. 

 Alcoholic, 



Dried. 

 Alcoholic. 



