79. P. trivittatum, Lea. 



Trypanostoma trivittatum, Lea, Proc. Acad. Nat. Sci., p. 175, 1862. Jour. 

 Acad. Nat. Sci., v. pt. 3, p. 282, t. 36, f. 102. Obs. ix., p. 104. 



80. P. t u r g i d u m , Lea. 



Melania turgida, Lea, Philos. Proc. ii. p. 82, Oct. 1841. Philos. Trans, ix., 

 p. 18. Wheatley, Cat. Shells U. S., p. 27. Binney, Check List, No. 

 278. Brot. List, p. 33. 



81. P. minor, Lea. 



Trypanostoma minor, Lea, Proc. Acad. Nat. Sci., p. 174, 1862. Jour. Acad. 

 Nat. Sci., v. pt. 3, p. 278, t. 36, f. 95. Obs. ix., p. 100. 



82. P. pumilum, Lea. 



Trypanostoma pumilum, Lea, Proc. Acad. Nat. Sci., p. 174, 1862. Jour. 

 Acad. Nat. Sci., v. pt. 3, p. 279, t. 36, f. 96. Obs. ix., p. 101. 



83. P. Tennessee"nse, Lea. 



Trypanostoma Tennesseense, Lea, Proc. Acad. Nat. Sci., p. 175, 1862. Jour. 

 Acad. Nat. Sci. v. pt. 3, p. 281, t. 37, f. 100. Obs. ix., p. 103. 



84. P. t r o c h u 1 u s , Lea. 



Trypanostoma trochulus, Lea, Proc. Acad. Nat. Sci., p. 175, 1862. Jour. 

 Acad. Nat. Sci., v. pt. 3, p. 282, t. 37, f. 103. Obs. ix., p. 104. 



Genus ANGITREMA, Haldeman. 



Angitrema, Haldeman, Cover of No. 2, Monog. Limniades, Jan. 1841. 

 Potadoma, Swainson, sp. H. & A. Adams, Genera i., p. 299, 1854. 

 Glotella, Gray, Zool. Proc., pt. 15, p. 154, 1847. 

 lo, Lea, (sp.) H. & A. Adams, Genera, i. p. 299, 1854. Chenu, Man. Conchyl. 



i. p. 290, 1859. Reeve, Monog. lo, April, 1860. Brot, Syst. Cat. 



Mel., p. 29, 1862. 

 Lithasia, Haldeman, sp. H. & A. Adams, Genera of Recent Mollusca, i. p. 



308, 1854. 



Anculotus, Say, (sp.), Jay, Cat. Shells., 4th Edit., p. 276, 1850. 

 Melania, (sp.) Authos. 



A. Body whorl with a coronal of tubercles. 



1. A. geniculata, Haldeman. 



Lithasia geniculata, Haldeman, suppl. to No. 1, Monog; of Limniades, Oct. 



1840. Binney, Check List, No. 299. 

 Anculotus genicnlatus, Haldeman, Jay, Cat. Shells, 4th Edit., p. 276. 



Hanley, Conch. Misc. t. 5, f. 41. Reeve, Monog. Anculotus 1. 1, f. 7. 

 Leptoxis geniculata, Haldeman, Brot, List, p. 24. 

 Lithasia genicula, Lea, Wheatley, Cat. Shells U. S., p. 28. 



2. A. Salebrosa, Conrad. 



Melania salebrosa, Conrad, New Fresh Water Shells, p. 51, t. 4, f. 5, 1834. 

 Chenu, Reprint, p. 24, t. 4, f. 13. Dekay, Moll. N. Y., p. 100. Wheatley, 

 Cat. Shells U. S., p. 26. Jay, Cat. 4th Edit., p. 274. 



Anculotus salebrosus, Conrad, Reeve, Monog. Ano. 1. 1, f. 6, (bad figure.) 



Leptoxis salebrosa, Conrad, Brot. List, p. 25. 



Lithasia salebrosa, Conrad, Binney, Check List, No. 303. 



3. A. subglobosa, Lea. 



Lithasia subglobosa, Lea, Proc. Acad. Nat. Sci., p. 55, Feb. 1861. Jour. 

 Acad. Nat. Sci., v. pt. 3, p. 261, t. 35, f. 70. Obs. ix., p. 83. 



4. A. T u o m e y i , Lea. 



Lithasia Tuomeyi, Lea, Proc. Acad. Nat. Sci., p. 55, Feb. 1861. Jour. 



Acad. Nat. Sci., v. pt. 3, t. 35, f. 68. Obs. ix., p. 81. 

 Anculotus Florentianus, Lea, Reeve, Monog. Anc. t. 1, f. 4. 



