of conchology. 215 



Reference to Plate. ^ "^ ' 



Fig. 1. Helix fidelis. Jaw. 



2. Orthalicus zebra. One central with its adjacent lat- 



eral, and one detached extreme lateral from the other 

 side of the membrane. 



3. Helix Hemphilli. Jaw. 



4. Helix muscarum. One central and one lateral tooth. 



5. Helicina orbiculata. The fifth lateral tooth. 



6. Achatina fasciata. One central and one lateral tooth. 



7. Helix tudioidata. One central and one lateral tooth. 



8. Bulimulus sicfflatus. Jaw. 



9. Helix fidelis. One central and one lateral tooth. 



10. Orthalicus undatus. One central and one lateral tooth. 



11. Helix redimita. Jaw. . 



12. Orthalicus undatus. One extreme lateral tooth. 



13. Bulimulus sufflatus. One central and one lateral 



tooth. 



14. Helix orbiculata. Jaw. 



15. Succinea effusa. One central and one lateral tooth. 



16. Helix muscarum. Jaw. 



