MUSEUM OF COMPARATIVE ZOOLOGY. 73 



Coelopleurus floridanus A. Ao. 



Some of the specimens of this species dredged off the Windward Islands in the 



Caribbean are much larger than the small tests from which this species was first 

 described. Several specimens measured over three quarters of an inch in diameter, 

 and others one inch in diameter. This species does not attain the size of C. Mail- 

 lardi. When alive it is most brilliantly colored, the color of the test varying 

 from a rich light chocolate in the interambulacra, separated by the brilliant 

 orange or yellow ambulacral areas. The primary radioles vary greatly in color, 

 from a delicate straw, often nearly white, to a bright carmine, or orange. 



Diadema setosum Gray. 



A single very young specimen of this species from 



Station 132. 115 fathoms. Off Santa Cruz. 



Aspidodiadema antillarum A. Ao. n. sp. 



Aspidodiadema microtuberculatuin A. Ac. Bull. M. C. Z., 1878, V. no. 9 (non Chall. 



Echini). 



At the time of writing the Report of the Challenger Echini, I referred the more 

 common of the West Indian species of Aspidodiadema to -/. microtuberculatum. 

 A more careful examination of the extensive series collected by the "Blake" shows 

 that these West Indian specimens belong to a species closely allied to A. micro- 

 tuberculatum, but differing from it in having a single row of minute plates larger 



