34 ROCHESTER ACADEMY OF SCIENCE. [Nov. 23, 



213. Turbo setosus, Gmelin. Both of the above forms were 

 received in considerable numbers. 



214. Tubo radiatus, Omel. 



Family TROCHIDi^. 



215. Trochus (Cardinalia) virgatus, Gmel. Does not seem 

 to be common. 



Family HALIOTIDiE. 



216. Haliotis pustulata, Reeve. A very variable species 

 received in considerable quantity, and allied to H. varia, Linn., but 

 separated from that species by the flattened cords of the surface. 



Family FISSURELLIDiE. 



217. Glyphis Ruppellii, Sowb. A very common species. 



Order POI,YPLACOPHORA. 

 Family CHITONID.S. 



218. Acanthopleura borbonica, Desh. A very common 

 species, very like Chiton piceiis^ Gmelin, from the West Indies. 



219. Chiton sp. A small species which I was not able to 

 identify. 



Class PELECYPODA. 



Family OSTREIDiE. 



220. Ostrea sp. Small specimen?, _ evidently young individ- 

 uals, found attached to floating pieces of pumice stone. 



Family SPONDYLIDiE. 



221. Spondylus coccineus, Lam. Very common. 



Family PECTINIDiE. 



222. Pedum spondyloideum, Gmelin. Not a common 

 species. 



