SIMPSON CONTRIBUTIONS TO THE MOLLUSCA OF FLORIDA. 65* 



CytJierea {Trigond) incerta Rom. Tortugas; one young shell. 



Circe (Gouldia) cerina C. B. Ad. Dredged in Tampa Bay, and off 

 Horse and Chaise. Found on Egmont Key. 



Dosinia elegans Con. Very abundant at Sanibel Island; occasion- 

 ally found elsewhere on the West coast; near Fernandina, F. C. Sawyer. 



Dosinia Discus Reeve. I have a few shells of this species from the 

 West coast. It is known to extend from the Carolina coast to Vera 

 Cruz, Mexico. 



Dosinia tenuis Dkr. Little Sarasota Key. 



Cyrena floridana Con. A salt water species, usually rather rare on 

 the West coast, but abundant on sand flats at Terraciea Island. 



Cyrena carolinensis Lam. Hillsborough River at Tampa; near Fer- 

 nandina, F. C. Sawyer; Manatee River; Braiden Creek, unusually 

 large and fine; Ware's Creek. It is a brackish water species, so far as 

 I have seen. I have it from near Havana. 



Sphcsrium partumeium Say. Pond south of the Manatee River. 

 Identified by Mr. Ancey, with doubt. I have compared these shells 

 with those of the above named species from Xew York, and believe 

 they are both the same. 



Pisidium abditum Hald.? Brook near Fogartyville. 



Pisidium sp. ind. Evans' plantation. 



Coralliophaga hornbeckiana D'Orb. Tortugas; scattered valves. 



Cypricai dia coralliophaga Gm. Tortugas; valves. 



Cardium magnum Born. A magnificent shell, and one of the most 

 abundant bivalves on the West coast. I have it from near Fernandina. 



Cardium isocardia L. West coast. 



Cardium muricatum L. West coast. 



Cardium bulla turn 1,. West coast; rare. 



Cardium medium L. Occasional valves were found at Key West. 

 One valve in good condition was picked up on Egmont Key. 



Cardium petit ian urn D'Orb. Valves were found at Tortugas. 



Ltzvicardium mortoni Con. West coast, rather common ; Red-fish 

 Point. Dredged in quantities, living, in the mouth of the Manatee 

 River, and in Sarasota and Tampa Bays; variable in size and coloring. 



Lavicardium serratum 1 ,. Marquesas Keys, several fine shells. 



Lcevicardium Icevigatum L. Valves often washed up on the West 

 coast, but perfect pairs are rare. 



Chama macrophylla Chem. Garden Key, Tortugas, on piling of an 

 old wharf, large and fine. Small shells are occasionally found on the 

 West coast. 



Chama arcinella L. West coast. 



Lucina lintea Con. Dredged in Manatee River; Terraciea Island; 

 Long Key. 



