142 PROCEEDINGS OF THE ACADEMY OP 



Bittium nigrum, Tott. 

 Bittium greenii, C. B. Ad. 



Dredged. 

 Bittium, sp. 



Extremely abundant in the shallowest and most sluggish parts 

 of the harbor, adhering to marine plants. On forcing a boat 

 through beds of this vegetation, where the water hardly covered 

 the dredge, we took scores of specimens in a few minutes ; and 

 the same haul showed the following : Tellina tenera, T. iris, Co- 

 lumbella avara, Abra, Nucula, Corbula, Obeliscus, Turbonilla 

 interrupta, Area holmesii, Nassa vibex, obsoleta, &c. The Bitti- 

 ums were blackish, and covered with vegetable matter. 



Triforis nigrocinctus, C. B. Ad. 



Dredged. 

 Odostomia seminuda, C. B. Ad. 



Dredged, in deeper waters. 

 Odostomia impressa. Say. 



Dredged, with the last. 

 Turbonilla interrupta, Tott. 



Beach and dredged. 

 Turbonilla 1 sp. 



Specimens in a large miscellaneous lot gathered on the beach. 



Obeliscus crenulatus, Holmes. 



Dredged. 



"I have not access to Holmes's description, but think this 

 must be his shell." 



Eulima oleacea, Ktz. and Stm. 



Dredged ? (Label misplaced.) 



Sigaretus perspectivus, Say. 



Very common. Dead shells are plentiful everywhere ; and on 

 Bird Shoals the live animals are frequently found. The largest 

 animals measured about four inches across, with a shell of an 

 inch or more. 



Natica pusilla. Say. 



Not common. Two or three specimens dredged. 



[July 25, 



