518 NON-MARINE FOSSIL MOLLUSCA. 



PLATE 16. LARAM1E. 

 Uxio COUESII White. (Pago 432.) 

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



UNIO IIOLMBSIANUS \V. (Page 433.) 



FIG. 2. Left side view of an 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. C. Posterior view of the same. 

 (All natural size.) 



UNIO BRACiiYOPiSTnus W. (Page 433.) 



FIG. 7. Right side view of an example not fully adult. 

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



