PLATE LXIII. 



PAGE 



Figs. 1-6. Ostrea vieginica Gmelin 204 



1. Interior of upper valve of young individual. Wailes Bluff. X 5/7 



2. Exterior of same. 



3. Interior of upper valve of older individual. Same locality. X 5/7 



4. Interior of lower valve of same. 



5. Interior of lower valve of individual shown in Pig. 1. X 5/7 



6. Exterior of same. 



