NON-MARINE FOSSIL MOLLUSC A. 539 



PLATE 27. LARAMIE. 

 CAMPELOMA MULTILINEATA Meek & Hayden. (Page 469.) 



FIG. 1. Copy of Meek's original figure. 



FIG. 2. Lateral view of a larger example, showing a slight angularity at the distal 

 side of the larger volutions. 



FIG. 3. Opposite view of the same. 



FIG. 4. Lateral view of another example, having the angularity a little more distinct. 



FIG. 5. Lateral view of another example, having the angularity distinct and promi- 

 nent. 



FIG. 6. Fragment showing the aperture, and prominent angularity. 



FIG. 7. Lateral view of an example from Crow Creek, Colorado. 



Figs. 2-6 are from the valley of the Yellowstone, Montana. (All natural size. ) 



CAMPELOMA VETULA M. & H. (Page 469.) 



FIG. 8. Lateral view of the type specimen of Meek & Hayden. 

 FIG. 9. Opposite view of the same, natural size. 



VIVIPARUS LEAI M. & H. (Page 467.) 



FIG. 10. Lateral view of a large example. 

 FIG. 11. Opposite view of the same. 

 FIG. 12. Lateral view of another example. 

 FIG. 13. Opposite view of the same. 



FIG. 14. Lateral view of another example, a little more elongated than usual. 

 (All'natural size.) 



CAMPELOMA MULTISTRIATA M. & H. (Page 469.) 

 FIG. 15. Copy of Meek's original figure. 



PLANORBIS CONVOLUTUS M. & H. (Page 447.) 



FIG. 16. Upper, under, and peripheral views of the type specimen of Meek & Hay- 

 den. After Meek. 



PLANORBIS (BATHYOMPHALUS) PLANOCONVEXUS M. & II. (Page 447.) 



FIG. 17. Upper view of the type specimen of Meek & Hayden, natural size. 

 FIG. 18. Peripheral view of the same. After Meek. 



PLANORBIS (BATHYOMPHALUS) AMPLEXUS M. & H. (Page 447.) 



FIG. 19. Upper view of the type specimen of Meek & Hayden, natural size. 

 FIG. 20. Under view of the same, enlarged. After Meek. 



PLANORBIS (BATHYOMPHALUS) KANABENSIS White. (Page 447.) 



FIG. 21. Upper view, natural size. 



FIG. 22. Under view of the same example. 



FIG. 23. Peripheral view of the same example. 



VALVATA? MONTANAENSIS Meek. (Page 470.) 

 FIG. 24. Outline views, enlarged. After Meek. 



VALVATA SUBUMBILICATA M. & H. (Page 470.) 



FIG. 25. Upper and under views of the type-specimen of Meek & Haydeu, natural 

 size. After Meek. 



