424 FOSSIL OSTREID^ OF NORTH AMEKICA. 



FIGURE LXXIX. 



Figs. 1, 2. — Views of the inside ami side of the very ventrieose or cup-like lower valve 



ot a short and tliick specimen of Ostrea virginica. 

 Figs. 3, 4. — Views of the internal and external surfaces of the flat upper or right 



valve of the same specimen. 



