Shells of Tampa Bay. 395 
Ostrea virginiana, Gmel. Abundant in Tampa Bay. 
Osteodesma hyalina, Con. . Abundant in Tampa Bay and lives 
as far north as Massachusetts. , 
Periploma inequivalvis, Lam. Rare. Bay shores. 
Pecten concentricus, Say. Common. Bay shores.—P. dislo- 
catus, Say. Common. Mullet Key. 
— Pinna - Common. Mullet Key and Tampa Bay. It has 
distant series of long, thick, remote, tubular spines. I cannot re- 
fer to any of the descriptions or figures I have seen.—P. flori- 
dana, Con. Mullet Key. Rarely entire. 
| Plicatula ramosa, Lam. Common. Egmont Key. 
_ Solen ensis, Lin. This is the variety minor which lives as far 
north as the Carolinas. The major is limited to the coast north 
of this latitude. This fact has led me to believe that two species 
are designated by the name of ensis. 
_ Solecurtus fragilis, Van. Common. Egmont Bay. I think 
this species is distinct from 8. fragilis, but in deference to the 
pinion of an eminent conchologist I have classed it as a variety 
of that species. 
Lellina punicea, Lin. Mullet Key —T\. acuta, Wood. Rare. 
Mullet Key.—T’. lateralis, Say. Common. Bay shores. This 
‘Shell also inhabits St. John’s river, East Florida, and is said to in- 
habit Africa and California.—T. . A thin sub-triangular spe- 
eles very common in Tampa Bay.—7. ——. Two or three un- 
determined species. Key shores. 
Venus cancellata, Lam. Next to Donaz variabilis the most 
abundant shell on Mullet Key.—V. punctulata, Valen. Egmont 
Key.—V, Mortoni, Con. Abundant in Tampa Bay, a gigantic 
Species found also in Charleston harbor. The young shell is 
covered with elevated lamin and generally has angulated mark- 
ings, resembling those of V. notata.. One specimen of consider- 
able size has distinct distant broad fulvous radii. The species I 
believe never has a purple spot in the interior.so general in speci- 
mens of V. mercenaria. 'The size is generally about, six and a 
quarter inches in length and five and a half inches in height, and 
the Weight of the shell without the animal about four pounds. 
It resembles the fossil V. permagna, Con., but that Species has 
much more robust concentric lines or ridges, and attains a rather 
larger size.— V. cuneimeris, Con. . Bay shores ; common. 
