25 



No. 216. Brot, List, p. 33. Callow, Conch. Nomenc., p. 188. DeKay 



Moll. N. Y., p. 98. Reeve, Monog. Melania, sp. 403, 

 Melania incrassata, Anthony, Ann. Lye. N. Y., vi. p. 99, t. 2. f. 17, March, 



1854. Binney, Check List, No. 144. Brot. List, p. 34. 

 Trypanostoma Hartmanii, Lea, Proc. Acad. Nat. Sci., p. 173, 1862. Jour. 



Acad. Nat. Sci., v. pt. 3, p. 270, t. 36, f. 80. Obs. ix. p. 92. 

 Trypanosioma Jayi, Lea, Proc. Acad. Nat. Sci., p. 173, 1862. Jour. Acad. 



Nat. Sci., v. pt. 3, p. 270, t. 36, f. 81. Obs., ix. p. 92. 



26. P. t o r t u m, Lea. 



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

 Nat. Sci., v. pt. 3, p. 275, t. 36, f. 89. Obs., ix. p. 97. 



27. P. dignum, Lea. 



Trypanostoma dignum, Lea, Proc. Acad. Nat. Sci., p. 273, 1862. Jour. Acad. 

 Nat. Sci., v. pt. 3, p. 350, t. 39, f. 219. Obs., ix. p. 172. 



D. Carinate, striate Pleurocerce. 



28. P. bicostatum, Anthony. 



Melania bicostata, Anthony, Proc. Acad. Nat. Sci., p. 56, February, 1860. 



Binney, Check List, No. 33. Brot. List, p. 30. Reeve, Monog. Melania, 



sp. 246. 

 Melania rigida* Anthony, Proc. Acad. Nat. Sci., p. 62, February, 1860. 



Binney, Check List, No. 229. Reeve, Monog. Melania, sp. 270. 



29. P. subulare, Lea. 



Melania subularis, Lea, Philos. Trans., iv. p. 100, t. 15, f. 30. Obs., i. p. 

 110, t. 15, f. 30. Ravenel, Cat., p. 11. DeKay, Moll. N. Y., p. 92, t. 

 7, f. 138. Wheatley, Cat. Shells U. S., p. 27. Jay, Cat., 4th Edit., 

 p. 275. Binney, Check List, No. 257. Brot, List, p. 35. Reeve, 

 Monog. Melania, sp. 428. Whiteaves, Canad. Naturalist, viii. p. 102, 

 April, 1863. 



30. P. subulaeforme, Lea. 



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

 Acad. Nat. Sci., v. pt. 3, p. 289, t. 36, f. 116. Obs., ix. p. 111. 



31. P. Henry an urn,* Lea, 



Trypanostoma Henryanum, Lea, Proc. Acad. Nat. Sci., p. 272, 1862. Jour. 

 Acad. Nat. Sci., v. pt. 3, p. 351, t. 39, f. 222. Obs., ix. p. 173. 



32. P. Lewisii,f Lea. 



Trypanostoma Lewisii, Lea, Proc. Acad. Nat. Sci., p. 172, 1862. Jour. Acad. 

 Nat. Sci., v. pt. 3, p. 292, t. 36, f. 120. Obs., ix. p. 114. 



33. P. annu lifer um, Conrad. 



Melania annulifera, Conrad, New Fresh Water Shells, p. 51, t. 8, f. 2, 1834. 

 Jay, Cat., 4th Edit., p. 272. Binney, Check List, No. 17. DeKay, 

 Moll. N. Y., p. 94. Wheatley, Cat. Shells U. S., p. 24. Brot. List, p. 

 30. Catlow, Conch. Nomenc., p. 185. Reeve,* Monog. Melania, sp. 308. 



Melania annulata, Conrad, Jay, Cat., 2d Edit., p. 455. 



Melania Ordiana, Lea, Philos. Proc., ii. p. 242, Dec., 1842. Philos. Trans, 

 ix. p. 26. Obs., iv. p. 26. Wheatley, Cat. Shells U. S., p. 26. Bin- 

 ney, Check List, No. 191. Brot, List, p. 30. 



34. P. Brumbyi, Lea. 



Melania Brumbyi, Lea, Philos. Trans., x. p. 298, t. 30, f. 5. Obs., v. p. 



* Juvenile shell, 



t Probably the young of sulula? forme. 

 I This may only be a striate form of elevcttum, Say. 

 Mr. Reeve's figure represents the variety described by Mr. Lea as Md. Ordiana. 



