NATURAL SCIENCES OF PHILADELPHIA. 25 



4. G. n u b i 1 a, Lea.* 



Melania nubila, Lea, Proc. Acad. Nat. Sci. p. 118, 1861. 

 Goniobasis nubila, Lea, Jour. Acad. Nat. Sci. v. pt. 3, p. 235, March, 1863. 

 Obs. ix. p. 57. 



5. G. v a r i an s, Lea.f 



Melania various, Lea, Proc, Acad. Nat. Sci. p. 120, 1861. 

 Goniobasis varians, Lea, Jour. Acad. Nat. Sci. v. pt. 3, p. 219, t. 34, f. 2, 

 March, 1863. Obs. ix. p. 41. 



6. G. H y d e i i, Conrad. 



Mdania Hydeii, Conrad, New Fresh- Water Shells, p. 50, t. 8, f. 1, 1834. 

 Reeve, Monog. Melania, sp. 248. DeKay, Moll. N. York, p. 93. Wheat- 

 ley, Cat. Shells U. S. p. 25. Binney, Check List, No. 141. 



Melania Hydei, Conrad, Jay, Cat. Shells, 4th edit. p. 273. Brot, List, p. 32. 

 Hanley, Conch. Misc. t. 1, f. 3. 



Melania Hydii, Conrad, Catlow, Conch. Nomene. p. 187. 



7. G. decorata, Anthony. 



Melania decorata, Anthony, Proc. Acad. Nat. Sci. p. 55, Feb. 1860. Reeve, 



Monog. Melania, sp. 251. Binney, Check List, No. 86. Brot, List, p. 32. 

 Goniobasis Trijoniana,% Lea, Proc. Acad. Nat. Sci. p. 272, 1862. Jour. Acad. 



Nat. Sci. v. pt. 3, p. 342, t. 38, f. 207, March, 1863. Obs. ix. p. 164, 



t. 38, f. 207. 

 Goniobasis granata, Lea, Proc. Acad. Nat. Sci. p. 272, 1862. Jour. Acad. 



Nat. Sci. v. pt. 3, p. 343, t. 38, f. 209, March, 1863. Obs. ix. p. 165. 



8. G. caelatura, Conrad. 



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



Acad. Nat. Sci. i. pt. 4, p. 278, t. 38, f. 3, Jan. 1850. Binney, Check 



List, No. 58. Brot, List, p. 32. Reeve, Monog. Melania, sp. 245. 

 Goniobasis Steivardsoniana, Lea, Proc. Acad. Nat. Sci. p. 272, 1862. Jour. 



Acad. Nat. Sci. v. pt. 3, p. 344, t. 38, f. 210, March, 1S63. Obs. ix. 



p. 166. 

 Goniobasis Tryoniana, Lea, Description in part. 



9. G. o c c a t a, Hinds. 



Melania occata, Hinds, Ann. and Mag. Nat. Hist. xiv. p. 9. Zool. Voy. 



Sulphur. Mollusca, ii. p. 56, t. 15, f. 5. Catlow, Conch. Nomene. p. 188. 



Brot, List, p. 34. Lea, Proc. Acad. Nat. Sci. p. 81, April, 1856. Reeve, 



Monog. Melania, sp. 267. 

 Juga occata, Hinds, Chenu, Man. de Cohchyl. i. f. 2016. 

 Melania Shastaensis,\\ Lea, Reeve, Monog. Melania, sp. 318. 



10. G. c a t e n a r i a, Say. 



Melania catenaria, Say, Jour. Acad. Nat. Sci. ii. p. 379, Dec. 1822. Binney, 

 Reprint, p. 111. Binney, Check List, No. 52. Reeve, Monog. Melania, 

 sp. 336. DeKay, Moll. N. York, p. 93. Wheatley, Cat. Shells U. S. 

 p. 24. Gibbes, Rep't. S. Carolina, p. 19. Jay, Cat. 4th edit. p. 273. 

 Catlow, Conch. Nomene. p. 185. Brot, List, p. 34. 



* Closely allied to G. oliva, Lea, but is larger, longer and tuberculate. 



t Nearly always tuberculate, and shouldered below the sutures. 



% G. decorata is a young shell, and, as is usual in this group, is sharply angulated at the peri- 

 phery. G. granata represents a half grown shell, and here the angle is almost obsolete, while G . 

 Tryoniana is the mature form. The entire identity of these several descriptions is proved by a 

 series of over two hundred specimens before me, 



Mr. lasts figure of Tryoniana belongs here, but his description of that species is made to include 

 the uext species, caelatura, Cunr. The green variety of granata is a shell of much heavier texture, 

 and may prove distinct. 



Half grown shell of caelatura. 



|| The Shastaensis of Mr. Lea is a very different shell, and certainly ought never to have been 

 confounded with this species, which it does not resemble in any particular. 



1864.] 



