504 NON-MARINE FOSSIL MOLLUSCA. 



PLATE 9. LARAMIE. 

 OSTREA GLABRA Meek & Haydeiu (Page 421.) 



FIG. 1. Exterior view of type; lower valve. After Meek. 

 FIG. 2. Interior view of the same. 



FIG. 3. Exterior view of a lower valve, from the valley of the South Platte, Colorado. 

 FIG. 4. Interior view of the same. 

 (All natural size.) 



