394 - Shells of Tampa Bay. 
and North Carolina. It is very distinct from either Cardita or 
Cypricardia. 
Cardita tridentata,* Say; rare. Egmont Key. 
Chama arcinella,* Lam.; abundant on north end of Mullet 
Key. 
Cytherea gigantea, Lam. Abundant. Mullet Key.—C. mac- 
ulata, Lam.; rare. Mullet Key. 
Corbula diarsinaite Con. Deep water, between Tampa Bay 
and Pensacola. 
Cyrena carolinensis, Bosc. Head of Tampa Bay.—C. Flori- 
dana, Con. Common on the bay shores. It prefers salt water, 
whilst the former species eneeeiey confines itself to the scarcely 
saline estuaries of rivers. 
Donaz variabilis, Say. The most abundant of all the bivalves. 
of Florida, burrowing in the sand. As the surf rolls over them 
they come to the surface, burying themselves instantly as the 
waves recede.— J). . A small ovate species. Coast of Flor- 
ida near St. Joseph’s Bay.—D. . Longer than D. variabilis, 
with an arched base. Egmont Bay. 
Lucina nassula, Con. Egmont Key. Nearly allied to the 
Miocene L. cribraria, Say.—L. pennsylvanica, Lam.; rare. 
mens Key.—L. squamosa,* Lam.; rare. Mullet Key. saat tig- 
; Lam.; rare. Mullet Key. eke floridana, Con.; very 
sania Mullet Key and bay shores. This is the analogue 
of the Miocene L. anodonta, Say. It is never so thick and vari- 
able in form nor so large as many of the fossil species.—L. eden- 
tula, Lam.; rare. Mullet Key.—LZ. trisulcata, Con. ; rare. Eg- 
mont Key. 
Mactra ovalis? Common. Egmont and Mullet Keys—. 
lateralis,* Say. Abundant. Egmont Key.—M. fragilis, Lam. 
Common. Bay Shores. 
Modiola demissa, Dill. Abundant. Bay shores.—M. datera- 
lis, Say. Bay shores—M. papyria, Con. Bay shores.—M. 
americana, (M. tulipa, Lam.) St. Joseph’s Bay. 
Mytilus hamatus, Say. Common. Manatee river, Tampa. 
—M. cubitus, Say. Common. Manatee river, Tampa. 
Meleagrina . Rare. Egmont Key. A small species with 
profoundly elotiwdeed scales. 
» Nucula acuta,* Con. Dredged up in deep water in the Gulf of 
Mexico.—N. eborea, Con. Rare. Egmont Key. 
