112 NON-MARINE FOSSIL M< LLUSCA. 



PLATE 1C. LARAMIE. 



Unio couesii White. (Page 26.) 



Fig. 1. Exterior view of a left valve. Natural size. 



Unio holmesianus W. (Page 27.) 



Fig. 2. Left side view of au adult example. 

 Fig. 3. Dorsal view of the same. 

 Fig. 4. Left side view of a young example. 

 Fig. 5. Front view of the same. 

 Fig. fi. Posterior view of the same. 

 (All natural size.) 



Unio brachyopisthus W. (Page 27.) 



Fig. 7. Right side view of au example uot fully adult. 

 Fig. 8. Front view of the same. Natural size. 



