ZOOLOGY. MOLLUSCA. 179 



? Lueina imbricatula, Adams. 

 W. Indies. 

 Luoina tigrina, L. 

 ^y. Indies. 



Luoina imbricatula, Adams. 



W. Indies, Aspinwall. 



Luoina Antillarum, Reeve. 



Luc'ma costata, D'Orb. 

 W. Indies. 



Luoina obliqua, Keeve. 



Lucina pectivata, Ads. 

 St. Thomas. 



Hysia pelluoida, u. sp. 



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

 tained in the collections of the Academj' of Natural Sciences. 



Crassatella Guadelupensis, D'Orb. 



W. Indies. 



Area Nose, L. 



W. Indies, Europe. 



Area Deshayesii, Hanley. 



St. Thomas. 



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

 tioned by Jones as a ver}' common shell of the Bermudas, is 

 this species. 

 Aroa gradata, Brod. 



Area Domingmsis, Lam. 



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



Aroa 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 



