102 NON-MARINE FOSSIL MOLLUSCA. 



PLATE 11. LARAMIE. 

 Ostrea glabra Meek & Harden. (Page 15.) 



Fig. 1. Exterior view of an upper valve of the variety 0. wyomivyeitsis Meek, from the 



valley of the South Platte, Colorado. 

 Fig. 2. Interior view of the same. 

 Fig. 3. Exterior view of an example of the upper valve of the same variety, from Point 



of Rocks, Southern Wyoming. 

 Fig. 4. Interior view of the same. 

 (All natural size.) 



