118 NON-MARINE FOSSIL MOLLUSCA. 



PLATE 19. LARAMIE. 

 Unio senectus White (Page 26.) 



Fig. 1. Exterior view of a portion of a right valve. 

 Fig. 2. Interior view of a portion of a left valve. 

 (Both natural size.) 



Unio goniambonatus W. (Page 27.) 



Fig. 3. Left side view, natural size. 

 Fig. 4. Dorsal view of the same. 



(Both figures are partial restorations, the type specimen having been dis- 

 torted by compression.) 



Anodonta parallela W. (Page 23.) 



Fig. 5. Left side view, restored from fragments ; natural size. 



Anodonta propatoris W. (Page 23.) 



Fig. 6. Left side view of an internal cast of large example. 

 Fig. 7. Right side view of a similar east of a larger example. 

 Fig. 8. Dorsal view of the same. 

 Fig. 9. Fragment showing the edentulous hinge. 

 (All natural size.) 



Corbula sdbtrigonalis Meek & Hayden. (Page 36. ) 



Fig. 10. Exterior view of a left valve, natural size. After Meek. 

 Fig. 16. Exterior view of left valve of the variety G. perundata Meek. 

 Fig. 17. Similar view of another left valve of the same variety. 



(Both natural size, and both after Meek.) 

 Fig. 15. Right side view of the variety C. tropidoplioru Meek, natural size. 

 Fig. 14. Right side view of the variety C. crassatelliformis Meek, natural size. 

 Fig. 11. Left side view of an example troin Crow Creek, Colorado; natural size. 

 Fig. 12. Dorsal view of the same. 

 Fig. 13. Left side view of another example from the same locality. 



