Trs. Am. Ph. S., 9, p. 19. 

 Trs. Am. Ph. S. 9, p. 28. 



Anctilotus incisus, Lea. 



is Amnicola isogona, Say. 

 is Melania Helvetica, Michel 



Guer. Mag., pi. 13. 

 Hald. Supp., No. 1, p. 1. 

 New H. Diss., 2, p. 277 

 Villa Cat., 1841, p. 37. 

 Trs. Am. Ph. S., 9, p. 20. 



Trs. Am. Ph. S., 8, pi. 5, f. 4. is Melania exilis, Hald. 



Jay's Cat., 1839, pi. 7, f. 11. 



Trs. Am. Ph. S., 9, p. 9. Melania robusta, Lea. 



Zool. Jour., 1, pi. 5, f. 5. 

 Amer. C., pi. 47, f. 1. 

 Phil. Icon., pi. 2, f. 10. 

 Trs. Am. Ph. S., 8, pi. 5, f. 29. 

 N. F. W. Shells, pi. 8, f. 8. 

 Wood Supp., pi. 8, f. 68. 

 Menke Synop., p. 135. 



Trs. Am. Ph. S., 8, pi. 5, f. 21. Melania Niagarensis, Lea. 



Born Mus., pi. 16, f. 21. 

 Schroet, p. 300, pi. 9, f. 12. 

 Amer. C., pi. 47, f. 3. 

 Proc. Bost. S. N. H., 1, p. 159. 

 New F. W. Shells, pi. 8, f. 9. 

 Trs. Am. Ph. S., 8, pi. 5, f. 21. 

 Amer. C., pi. 8, f. 1, 2. 

 New Harm. Diss., 2, p. 276. 

 Trs. Am. Ph. S., 8, pi. 5, f. 20. 

 Am. Jour. ScL, 25, pi. 1, f. 13. 

 Trs. Am. P. S., v. 10, pi. 9, f. 52. 

 Trs. Am. Ph. S., 9, p. 18. 

 Mai. et C. Mag., pi. 1, f. 1-3. 

 Trs. Am. Ph. S., 8, pi. 6, f. 41. 

 Trs. Am. Ph. S., 6, pi. 23, f. 90. 

 Am. Jour. S., 25, pi. 1, f. 14. 

 Jour. Ac. N. S., 5, p. 126. 



Guer. Mag., pi. 13. 

 Trs. Am. Ph. S., 8, pi. 5, f. 16. 

 Trs. Am. Ph. S., 9, p. 19. 

 New F. W. Shells, pi. 9, f. 7. 

 New F, W. Shells, pi. 4, f. 5. 

 Wood Supp., pi. 4, f. 24. 

 Phil. Icon., pi. 3, f. 2. 



Helix amarula, Born. 

 Mitra thiarella 1 Lam. 

 Melania Virginica 1 Say. 



is Melania livescens, Menke. 

 Melanopsis semigranulosa. 

 is Anculotus obovatus, Say. 



(Schizostoma), Lea. 



Melania carinata, Rav. 

 Melania tuberculosa, Rang 



is Melania laeta, Jay. 



