310 PROCEEDINGS OF THE ACADEMY OP 



Binney's Reprint, p. 65. Binney, Check List, No. 45. DeKay, Moll. 



N. Y., p. 94. Wheatley, Cat. Shells U. S., p. 24. Ravenel, Cat., p. 



11. Jay, Cat., 4th Edit., p. 273. Anthony, List, 1st and 2d Edit. 



Kirtland, Report Zool. Ohio, p. 174. Catlow, Conch. Nomenc., p. 185. 



Brot, List, p. 30. Reeve, Monog. Mel., sp. 304. 

 Ceriphasia canaliculata, Say, Chenn, Manuel, Conchyl. i. f. 1959. 

 Melania conica,* Say, Jour. Acad. Nat. Sci., ii. p. 176, January, 1821. Bin- 

 ney's Reprint, p. 70. Binney, Check List, No. 65. Reeve, Monog. 



Mel., sp. 252. DeKay, Moll., N. Y., p. 95. Ravenel, Cat., p. 11 = 



Haldeman, Monog. Linmiades, No. 7, p. 4 of Cover. Brot. List, p. 30. 



Kirtland, Rep. Zool. Ohio, p. 174. Anthony, List, 1st and 2d Edit. 



Jay, Cat., 4th Edit., p. 273. Wheatley, Cat. Shells U. S., p. 24. 



Catlow, Conch. Nomenc, p. 186. 

 Melania substricta,] Haldeman, Suppl. to Monog. of Limniades. 

 Strombus Sayi, Wood, Index Testaceol. Suppl., t. 4, f. 24. 

 Melania Sayi, Wood. Short and Eaton, Notices, p. 82. Anthony, List, 1st 



and 2d'Edit. 

 Melania Sayi, Ward. Wheatley, Cat. Shells U. S., p. 27. 

 Melania Sayii, Ward. Kirtland, Rept. Zool. Ohio, p. 174. Jay, Cat., 4th 



Edit., p. 274. Higgins, Cat., p. 7. 

 Melania Sayii, Deshayes, Catlow, Conch. Nomenc, p. 188. 

 Melania exarata, Menke, Syn. Meth., p. 135, 1830. Binney, Check List, 



No. 100. 

 Melania ligata, Menke, Syn. Meth., p. 136, 1830. Binney, Check List, No. 



162. 

 Melania auriscalpium, Menke, Syn. Meth., p. 136, 1830. Binney, Check 



List, No. 25. 



9. P. fi lum,J Lea, 



Melania Jilum, Lea, Philos. Proc, iv. p. 165. Philos. Trans., x. p. 62, t. 9, 

 f. 41. Obs., iv. p. 62. Binney, Check List, No. 109. Brot, List, p. 

 30. Reeve, Monog. Mel., sp. 402? 



Elimia Jilitm, Lea, Chenu, Man. Conchyl. i. f. 1980. 



10. P. ponderosum, Anthony. 



Melania ponder osa, Anthony, Proc Acad. Nat. Sci.. Feb., 1860, p. 59. Bin- 

 ney, Check List, No. 213. Brot, List, p. 59. 



Trypanosoma dux, Lea, Proc. Acad. Nat. Sci., p.'170, 1862. Jour. Acad. 

 Nat. Sci., v. pt. 3, p. 283, t. 36, f. 105. Obs., ix. p. 105. 



11. P. olivaceum, Lea. 



Trypanosoma olivaceum, Lea, Proc Acad. Nat. Sci., p. 172, 1862. Jour. 

 Acad. Nat. Sci., v. pt. 3, p. 290, t. 36, f. 117. Obs., ix. p. 112. 



12. P. Tro os t i i, II Lea. 



Trypanosoma Troostii, Lea, Proc. Acad. Nat. Sci., p. 171, 1862. Jour. 



Acad. Nat. Sci., v. pt. 3, p. 285, t. 36, f. 107. Obs., ix. p. 107. 

 Trypanosoma viride,^ Lea, Proc Acad. Nat. Sci., p. 172. 1862. Jour. Acad. 



Nat. Sci., v. pt. 3, p. 291, t. 36, f. 119. Obs., ix. p. 113. 

 Trypanosoma liyatam,** Lea, Proc. Acad. Nat. Sci., p. 171, 1862. Jour. 



Acad. Nat. Sci., v. pt. 3, p. 288, t. 36, f. 114. Obs., ix. p. 110. 



* Juvenile shell. 



t Proposed uDder the impression that conica was preoccupied. 



X Distinguished trom canaUcvlatvm by its more elevated spire, more prominent carina, and flat- 

 tened whorls. It almost entirely replaces canaliculatum in the waters of Tennessee, and if spe- 

 cifically identical with that species, must at least he distinguished as a local variety. 



\ Appears to he doubtfully distinct from canaliculatum, excuratum, &c. It is doubtful, indeed, 

 whether the whole group contains more than one species. 



|| More inflated and more convex than canaliculatum, with the inferior half of the body whorl 

 longer and more convex. 



f ** Young shells of Troostii in different stages of growth. 



[Nov. 



