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



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

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

 Obs. ix. p. 67. 



5. G. V a r i a n s, Lea.f 



Melania varians. Lea, Proc, Acad. Nat. Sri. p. 120, 1861. 

 Goniobasis rarians, 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, Courad. 



Melania 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 Hi/dei, Conrad, Jay, Cat. Shells, 4th edit. p. 273, Brot, List, p. 32, 

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



Melania Ei/dii, Conrad, Catlow, Conch. Nomene. p. 187. 



7. G. d e c o r a t a, 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 Tryoniana ,% Lea, Pfoc. 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. c se 1 a t u r a, Conrad. 



Melania calatura, 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 Stewardsoniana,^ Lea, Proc. Acad. Nat. Sci. p. 272, 1862. Jour. 



Acad. Nat. Sci. v. pt. 3, p. 344, t. 38, f. 210, March, 1863. 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. 



* Clopely allied to G. oliva, Lea, but is larger, longer ami tuVierculate. 



t Nearly always tuberc-ulate, and shoulilered below the suturts. 



j G. decm-ata is a young shell, and, as is usu;U iu this group, is sharply angulatcfl at the peri- 

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

 Tn/oniana is the mature form. The entire identity of these several deseriptions is proved by a 

 aeries of over two hundred gpeeimens before me, 



Mr. hea.'s fig u IX of Tryoniana belongs here, but his lUscripiion of that species is made to include 

 the next species, ciflatwa, Cunr. The green variety of gratia ta is a shell of much heavier texture, 

 and may prove distinct. 



§ Half gi own shell of cxlaipra. 



II The iltasiaensis of Mr. Lea is a very di£ferent shell, and certainly ought never to have been 

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



