530 NON-MARINE FOSSIL MOLLUSCA. 



PLATE 22. LARAMIE. 

 CORBICULA CYTHERIFORMIS Meek & Hayden. (Page 437.) 



FIG. 1. Left side view of a large example. 

 FIG. 2. Right side view of a small example. 



(Both after Meek.) 



FIG. 3. Right side view of an example from Southern Wyoming. 

 FIG. 4. Dorsal view of the same. 

 FIG. 5. Hinge view of left valve ; from same locality. 

 'Fio. 6. Similar view of right valve ; from same locality. 



(All natural size.) 



CORBICULA (LEPTESTHES) PLANUMBONA Meek. (Page 437.) 



FIG. 7. Right side view of an adult example. 

 FIG. 8. Dorsal view of the same. 

 FIG. 9. Left side view of a large example. 

 (All natural size.) 



CORBICULA (LEPTESTHES) CARDINI^FORMIS White. (Page 437.) 



FIG. 10. Left side view of a large example. 

 FIG. 11. Dorsal view of the same. 



FIG. 12. Exterior view of a right valve of a smaller example. 

 FIG. 13. Interior view of the same. 

 FIG. 14. Dorsal view of another example. 



FIG. 15. Exterior view of a left valve, less transversely elongate than usual. 

 (All natural size.) 



