ZOOLOGY. MOLLUSCA. ite 



? Lncina imbricatula, Adams. 

 W. Indies. 



Lucina tigrina, L. 



W. Indies. 



Lucina imbricatula, Adams. 



W. Indies, Aspinwall. 



Lucina Antillarum, Reeve. 



Lucina costata, D'Orb. 

 W. Indies. 



Lucina obliqua, Reeve. 



Lucina pcctinata, Ads. 

 St. Thomas. 



Mysia pellucida, n. sp. 



A form identical with the above, from St. Thomas, is con- 

 tained in the collections of the Academy of Natural Sciences. 



Crassatella Guadelupensis, D'Orb. 



W. Indies. 



Area Noae, L. 



W.. Indies, Europe. 



Area Deshayesii, Hanley. 



St. Thomas. 



I have no doubt that the Area Americana, of Gray, men- 

 tioned by Jones as a very common shell of the Bermudas, is 

 this species. 



Area gradata. Brod. 



Area Domingensis, Lam. 



Florida, St. Thomas, Mazatlan, Cape Verde I. 



Area Adamsi, Shuttl. 



Florida, Cuba. 



The Bermudian specimens appear to be somewhat less pro- 

 duced posteriorly than the more southern forms, but in other 

 respects they agree very closely. The species is probably 



