Shells of Tampa Bay. 393 
Ant, XXXVI—Catalogue of Shells Inhabiting Tampa Bay 
and other parts of the Florida Coast; by 'T. A. Conran, 
Bivalves. 
Amphidesma variegata, Lam.; rare. Mullet Key of Tampa 
_ Bay.—A. radiata, Say; found alive on Mullet Key.— A. orbicu- 
lata, Say ; rare. Mullet Key.—A. equalis,* Say; common. Mul- 
let Key. : 
_ Arca zebra, dredged up alive in Tampa Bay. 
Artemis elegans,* Conrad; rare. Mullet Key.—A. concentrica, 
Lam.; common. This and the preceding species have probably 
been regarded as identical, but in every stage of growth there is 
a uniform and marked difference ; the former species being more 
orbicular and convex, and having much more remote and distinct 
stooves, a character as obvious on the young shells as on the 
adults. It is much the rarest of the two species, and occurs fos- 
sil in the Miocene of North Carolina. 
Anomia ephippium,* Lin.; common. Keys of Tampa Bay. 
Area scapha? common. Mullet Key.—A. incongrua, Say ; 
tare. Mullet Key.—<A. ponderosa, Say; rare. Mullet Key. 
Avicula ——; rare. Egmont Key, Tampa Bay. 
Astarte lunulata,* Con. ; common. Egmont Key, Tampa Bay. 
—A. flabella ; rare. Egmont Key, Tampa Bay. 
Cardium citrinum, Wood; common. Mullet Key.—C. iso- 
cardia, Lam.; common. Mullet Key.—C. magnum, Born. ; 
common. Mullet Key.—C. bullatum, Lam.; rare. Mullet Key. 
—C. Mortoni, Con. Very abundant on the shores of Tampa 
Bay, and I do not temember finding it on any of the Keys. ‘The 
allied species, C. citrinum, on the contrary, occurs only on the 
Keys. ‘The former is readily distinguished by its far less size, 
Want of polish, and the almost invariable purple spots which mark 
the interior of C. Mortoni. 'The latter lives as far north as Mas- 
sachusetts, but the eztrinum is confined to the southern coast. 
Carditamera floridana, Con. Common in Tampa Bay fre- 
(uenting oyster beds, (Cypricardia nodulosa, Mighels.) I did 
hot find it on the Keys of Tampa. It also occurs on the shores 
of Key West and of Lignum Vite Key, East Florida. There 
are several Miocene spécies of this genus in Virginia, Maryland, 
Szconp Szrizs, Vol. I, No. 6.—Nov., 1846. 51 
