32 [Senate 



Plicatula . 



SpoNDyLTJs GiEDAEOPUs. The Thorny Red Spondylus 



Spondylus . 



Spondylus . 



FAMILY OSTKACEA. 



OSTREA . 



Anobiia ephippium, 2 sp. The Saddle Anomicu 



CLASS IV. MOLLUSCA. 



FAMILY PHYLLIDIACEA. 



Chiton , 3 sp. 



Patella. Eleven species. 



FAMILY OALYPTRAOEA. 



FiSSURELLA , 2 sp. 



PiSSURELLA . 



Crepidula , 4 sp. 



FAMILY BULL.EANA. 

 Bulla aplustre. The Streamer-like Bulla. 

 Bulla ampulla, 4 sp. 



FAMILY COLIMACEA. 

 Helix heteroclites. 

 Helix albolabris. 



Helix from St. Domingo. 



Helix . 



Helix , 2 sp. 



Helix , 4 sp. 



Helix , 2 sp. 



Helix , 5 sp. 



Helix , 4 sp. 



Helix . 



Carocolla lapicida. The Stone Carocolla. 



