156 MKLVILL: MOLLUSCA of S. CAROLINA AND FLORIDA. 



Class: HETEROPODA. 



3. lanthina communis (Lam.) 



Abundantly cast ashore at Key West after gales. In 

 one or two instances I have found the animal alive, with its 

 well-known " raft." The Portuguese Man of War (Physalia) 

 and the Velella invariably seem to accompany the lanthina. 



4. I. exigua (Lam.) With the preceding. 



[A third and perhaps a fourth species I likewise found 

 at Key West, but so similar are all the species of that section 

 that I forbear naming it provisionally.] 



Class : GASTEROPODA. 

 Fam: MURICIDjE. 



5. Murex Salleanus (H. Adams). 



Coral reef. Key West, but rare. 



6. M, (Ocinebra) tetragonus (Brod.) 



Key West. Common. 



7. M. (Ocinebra) cyciostomus (Sowb.) 



Key West. Common. 



8. M. (Muricidea) hexagonus (Lamk.) 



Not common. I found three or four specimens, 

 mostly tenanted by Hermit crabs. In good condition, the 

 mouth of this species is often found of a pink color. 



9. Trophon cinereus (Say.) 



Abundant on rocks at low water, Sullivan's Island and 

 Fort Sumter, South Carolina. 



10. Cantharus coromandeiianus (Lamk.) 



Very abundant. Coral reefs. Key West. 



11. Hemifusus corona (Gmel.) 



The normal form. Cedar Keys. West Florida. 



