NON-MAEINE FOSSIL MOLLUSCA. 133 



PLATE 27. LAEAMIE. 

 Campeloma multilineata Meek & Hayden. (Page 63.) 



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, haviugthe angularity a little more disiinct. 



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 I he Yellowstone, Montana. (All natural size.) 



Campeloma vetula M. & H. (Page 63. ) 



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

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



Vivipakus leai M. & H. (Page 61.) 



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. & tl. (Page 63.) 



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



Planorbis coxvolutus M. & H. (Page 41.) 



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

 den. After Meek. 



Planorbis (Bathyomphalus) planoconvexus M. & If. (Page 41.) 



Fig. 17. Upper view of the type specimen of Meek & Hayden, nat ural size. 

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



Planorbis (Bathyomphalus) amplexus M. & H. (Page 41.) 



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) kanajbensis White. (Page 41.) 



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 64.) 



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



Valvata subumbilicata M. & H. (Page 64.) 



Fig. 25. Upper and under views of the type-specimen of Meek & Hayden, natural 

 size. After Meek. 



