360 FOSSIL OSTREID^ OF NORTH AMERICA. 



PLATE XLVII. 



OsTREA BELLIPLICATA Sliumard. (Page 393.) 



Fig. 1. — Exterior view of the under side ; natural size. 

 2. — Lateral view of the same example. 

 3. — Exterior view of the upper valve. 



OsTRBA PATINA Meek & Hayden. (Page 298.) 



4. — Exterior view of an upper valve; natural size. 



r). — Similar view of a lower valve. 



6. — Interior view of the same example. After Meek. 



