.84 NON-MARINE FOSSIL MOLLUSCA. 



PLATE 2. CARBONIFEROUS. 



Pupa vetusta Dawson. (Page 50.) 



Fig. 1. Lateral view, enlarged. 



Fig. 2. Apertural view, enlarged. After Dawson. 



Dawsonella mebki Bradley. (Page 47.) 



Fig. 3. Apertural view, enlarged. 



Fig. 4. Outline of under view, enlarged. After Whitfield. 



Anthracopupa ohioensis Whitfield. (Page 50.) 



Fig. 5. Lateral view, enlarged. 



Fig. 6. Lateral view, outline showing edge of outer lip. 



Fig. 7. Lateral view, outline showing aperture. 



Fig. 8. Outline view of aperture, more enlarged. After Whitfield. 



Pupa bigsbyi D. (Page 50.) 



Fig. 9. Lateral view, enlarged. 



Fig. 10. Lateral view of a smaller example, enlarged. After Dawson. 



Zonites priscus D. (Page 47.) 



Fig. 11. Lateral view, enlarged. 



Fig. 12. View showing the aperture, enlarged. After Dawson. 



Pupa vermillionensis B. (Page 50.) 



Fig. 13. Lateral view, enlarged. 



Fig. 14. Lateral view, showing the aperture, enlarged. After Dawson. 



Naiadites carbonaria D. (Page 19.) 



Fig. 15. Left side view, natural size. After Dawson. 



Naiadites elongata D. (Page 19.) 



Fig. 16. Right side view, natural size, and enlarged. After Dawson. 



Naiadites LiEVis D. (Page 19.) 



Fig. 17. Left valve enlarged, and smaller examples of natural size. After Dawson. 



