Shells of Tampa Bay. 397 
seau has described the animal of Pyrula ficus, and shown that it 
_ has more affinity for Harpa and Doliwm, than for other species 
of Lamarck’s genus Pyrula. In exterior characters and general 
appearance, the animal of Say’s P. papyracea bears no resem- 
blance to that of Fulewr perversus and its congeners. It is not 
operculated, and spreads a very singular mantle over’ nearly the 
Whole shell. The mode of excluding their young in a spiral 
string of chambers is peculiar to the P. perversa, pyruloides, carica 
and canaliculata, which constitutes Montford’s genus Fulgur. 
_ Fasciolaria trapezium, Lam. Common. Bay shores.—F’. dis- 
fans, Lam. Common. Mullet Key and Bay shores.—F’. tulipa, 
Lam. Common. Mullet Key and Bay shores. 
Fusus perrugatus, Con. Manatee river. Fusiform, with re- 
mote longitudinal ribs, and large prominent revolving lines alter- 
nated with a fine line ; whorls longitudinally rugose, upper half 
flat and oblique ; aperture rather more than half the length of the 
shell, purple within; labrum striate ; color of the exterior cine- 
_Yeous. Proportionally wider than F’. cinereus, with fewer and 
larger ribs and lines, 
Fissurella, Key shores. 
Littorina littorea, Say. Bay shores.—L. (Phasianella) angu- 
lifera, Lam. Abundant on grass, bushes and trees on the Bay 
shores, 
Murex ostrearum, Con. Mullet Key.—M. cellulosa, Con. 
Tnhabits oyster beds in Tampa Bay.—M. tampaensis, Con. 
Tnhabits oyster beds in Tampa Bay. 
Marginella conoidalis, Kiener. Abundant. Bay shores—J. 
succinea, Con. Rare. Bay shores.—M. albilabris, Con. Rare. 
Bay shores. 
Monodonta, Tampa Bay. Common. 
Melampus bidentatus, Say. Common. Bay shores. 
Melongena corona (Fusus) Lam.’ Common. Bay shores. 
This shell has all the characters of the genus Melongena. | 
_ Natica duplicata*? Say. Mullet eve and Bay shores.—N. 
canrena,* Lam. Very rare. Egmont Key. 
~ Neretina ( Theodorus) reclinata, Say. Manatee and Hillsbor- 
ough rivers, Tampa; Mobile, Alabama. 
Oliva litterata;* Lam. Common. Key shores, living a few 
| inches deep in the sand, and readily found by its trail on the sur- 
, face.—0, mutica, Lam. St. Joseph’s Bay. Its habits are the 
