NATURAL SCIENCES OF PHILADELPHIA. 27 



19. G. Postellii, Lea. 



Melania Postellii, Lea, Proc. Acad. Nat. Sci. p. 166, July, 1858. Binney, 



Check List, No. 214. Brot, List, p. 34. 

 Melania Portellii, Lea, Reeve, Monog. Melania, sp. 427. 

 Goniobasis Postellii, Lea, Jour. Acad. Nat. Sci., v. pt. 3, p. 343, t. 38, f. 208, 



March, 1863. Obs. ix. p. 165. 



20. G. a r a c h n o i d e a, Anthony. 



Melania arachnoidea, Anthony, Ann. Lye. Nat. Hist. N. Y., vi. p. 95, t. 2, 



f. 14, March, 1854. Binney, Check List, No. 19. Brot, List, p. 34. 



Reeve, Monog. Melania, sp. 83. 

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



Binney, Check List, No. 151. Brot, List, p. 34. Reeve, Monog. Me- 



lani, sp. 296. 



21. G. Conradi, Brot.f 

 Melania Conradi, Brot, List, p. 36. 



Melania symmetrica, Conrad, Proc. Acad. Nat. Sci., iv. p. 155, Feb., 1849. 

 Journ. Acad. Nat. Sci., i. pt. 4, p. 278, t. 38, f. 5, Jan., 1850. Binney, 

 Check List, No. 260. 



22. G. c a r ini f era, Lam. 



Melania carinifera, Lamarck, Anim. sans Vert. Deshayes, Anim. sans 

 Vert., 2d edit., viii. p. 433. Wheatley, Cat. Shells U. S., p. 24. Bin- 

 ney, Check List, No. 48. Catlow, Conch. Nomenc, p. 185. Brot, List, 

 p. 36. Reeve, Monog. Melania, sp. 273. 



Melania bella,% Conrad, New Fresh-Water Shells, Appendix, p. 6, t. 9, f. 4, 

 1834. Binney, Check List, No. 29. Brot, List, p. 36. Reeve, Monog. 

 Melania, sp. 269. 



Melania perangulata, Conrad, Proc. Acad. Nat. Sci., iv. p. 154, Feb., 1849. 

 Jour. Acad. Nat. Sci., i. pt. 4, p. 278, t. 38, f. 6. Binney, Check List, 

 No. 199. Brot, List, p. 36. Reeve, Monog. Melania, sp. 285. 



Melania percarinata, Conrad. Proc. Acad. Nat. Sci., iv. p. 155, Feb., 1849. 

 Jour. Acad. Nat. Sci., 2d ser., i. pt. 4, p. 278, t. 38, f. 10. Binney, 

 Check List, No. 200. Brot, List, p. 36. 



Melania nebidosa, Conrad, Proc. Acad. Nat. Sci., iv. p. 155, Feb., 1849. 

 Jour. Acad. Nat. Sci., i. pt. 4, p. 278, t. 38, f. 9. Binney, Check List, 

 No. 172. Brot, List, p. 36. 



Melania bella-crenata, Haldeman, Monog. Limniades, No. 4, p. 3 of cover, 

 Oct. 5, 1841. Jay, Cat., 4th ed., p. 273. Binney, Check List, No. 30. 

 Brot, List, p. 36. 



Melania monilijera, Anthony, Jay, Cat., 4th ed., p. 474. 



C. Shell plicate. 



23. G. obesa, Anthony. 



Melania obesa, Anthony, Reeve, Monog. Melania, sp. 469, May, 1861. Brot, 

 List, p. 33. 



24. G. bland a, Lea. 



Melania blanda, Lea, Proc. Acad. Nat. Sci., p. 122, 1861. 

 Goniobasis blanda, Lea, Jour. Acad. Nat. Sci., v. pt. 3, p. 242, t. 35, f. 44, 

 March, 1863. Obs. ix. p. 64, t. 35, f. 44. 



* Half-grown shell. 



t Dr. Brot proposed the name Conradi for this species, as symmetrica is preoccupied by Prof. 

 Haldeman. I doubt whether it is distinct from G. carinifera, Lam. 



1 That all the species here quoted are synonyms of carinifera does not admit of doubt. The 

 species is rather a variable one in respect of proportions and ornamentation. 



"2 The name of this species must be changed because preoccupied by Mr. Lea himself. 



1864.] 



