398 Shells of Tampa Bay. 
same with the preceding —O. anazores. Southern coast of 
Florida. 
Ovulum aciculare, Lam. Very rare. Tampa Bay. 
Patella, —~. 
Pleurotoma, a small black tuberculated species. Tampa Bay. 
Smail ; longitudinally ribbed; pale. Tampa Bay. 
Pollia tincta, Cote Inhabits a sand bal at the entrance of 
Manatee‘riven—P, cancellaria, Con. Ship Island. 
Pyrula papyracea, Say, (genus Ficus, Rousseau.) Mullet 
Key. Common. 
Pyramidella alveata, Con. Rare. Bay shores. 
Pyrena scalariformis, Say. Common. Inhabits pools on the 
eys. 
ftanella caudata, Say. Rare. Mullet Key. 
Strombus pugillus. Common. Mullet Key. 
Scalaria. Rare. Bay shore 
Triton lineolatum, Con. Bay shictai-«.Tnincatelia macnn 
Bay shores. 
Turbo castaneus. Common. Mullet Key. 
Trochus tampaensis, Con. Bay shores. 
Voluta Junonia. Very rare. Egmont Key. 
Vermetus lumbricalis, Lam. . Mantee river. 
Multivalves. 
ees ovularis, Lam. 
Coronula testudinalis, Sow. On the gee turtle in Tampa Bay: 
Pholas costata. Rare. Mullet K 
Teredo navalis, Lin. Common. Tam Bay. 
In the above catalogue the Miocene species are indicated by 
an asterisk. 
Although the proportion of univalves and bivalves is nearly 
equal as to species, yet the bivalves far outnumber in quantity 
the former ; and this is the case also in the Tertiary deposits. 1 
had siieasked this fact years ago, and alluded to it in my publi- 
cation on the Miocene fossils. It holds good on every part of the 
coast I have visited, but in the bays, lagoons and estuaries I found 
the proportion of univalves much larger than on the sea beach. — 
_. The land shells about Tampa are Polygyra plicata, P. septem- 
volva, Glandina truncata, and a species of Pupa. On Lignum 
fey Fe he, A faup, the same melee with Acha- 
a 
; 
J 
