76 BuLivETiN 9 268 



Explanation of Plate i. 



(7) 



Page. 

 Ostrea cojupressirostra Say 37 , 229 



These figures were drawn by Lesueur to ac- 

 company Say's article in the Jonrnal of the 

 Phila. Acad. Nat. Sci., vol. iv, 1824. See Bull. 

 Amer. Paleont., vol. i, pi. 27. 



