NATURAL SCIENCES OF PHILADELPHIA. 27 



198. G. semicarinata, Say. 



Juga exilis, Hald., Adams' Genera i. p. 304. 

 Ceriphasia Kirtlandiana, Adams' Genera i. p. 297. 

 Potadoma inornatus, Adams' Genera i. p. 299. 



199. G. Haldemani, Tryon. 



Goniobasis Haldemani, Tryon, Am. Journ. Conch, i., Feb. 25, 1865. 



203. G. Alexandrensis, Lea.* 



Ceriphasia Alexandrensis, Lea, Adams' Genera i. p. 297. 



204. G. Haleiana, Lea. 



Ceriphasia Haleiana, Lea, Adams' Genera i. p. 297. 



208. G. p r o x i m a, Say. 



Juga proximo, Say, Adams' Genera i. p. 304. 



208a. G. rufescens, Lea.f 

 Potadoma rufescens, Lea, Adams' Genera i. p. 299. 



209. G. Virginica, Gmel. 



Buccinum Virginica, Gmel. Syst. Nat. p. 3505. Schroter, Einleit. i. p. 414, 

 1783. Martini, Berlin Mag. if. p. 348, t. 10, f. 48. Schreibers, Ein- 

 leit. Conchyl. t. 113, f. 7. 



Melania Virginica, Say, Villa., Cat. Syst. p. 36, 1841. 



Io Virginica, Say, Morch, Yoldi Cat. p. 56. 



Ceriphasia Virginica, Gmel., Adams' Genera i. p. 297. 



Juga Virginica, Say, Adams' Genera i. p. 304. 



Juga multilineata, Say, Adams' Genera i. p. 304. 



210. G. Sulcosa, Lea. 



Ceriphasia sidcosa, Lea, Adams' Genera i. p. 297. 



211. G. Buddii, Lea. 



Juga Buddii, Say, H. and A. Adams' Genera i. p. 304. 



212. G. Troostiana, Lea. 



Melania Troostiana, Lea, Troschel, Archiv fur Naturgesch. ii. p. 227. 

 Juga Troostiana, Lea, Adams' Genera i. p. 304. 



J. Heavy, pupreform or cylindrical species. 



217. G. cylindracea, Conrad. 



Melania cylindracea, Con., New Fresh- Water Shells, p. 55, t. 8, f. 10, 1834. 

 Midler, Synopsis, p. 47, 1836. Binney, Check List, No. 84. 



Melania cylindrica, Con., Wheatley, Cat. Shells, U. S., p. 25. Reeve, Mo- 

 nog. Melania, sp. 311. Brot, List, p. 32. 



Melania oppugnata, Lea, Philos. Trans, x. p. 300, t. 30, f. 9. Observations, 

 v. p. 56. Binney, Check List, No. 190. 



218. G. p u p o i d e a, Anthony. J 



Melania pupoidea, Anthony, Ann. Lye. Nat. Hist. N. Y., vi. p. 104, t. 3, f. 



3, April, 1854. Brot, List, p. 33. Binney, Check List, No. 224. Reeve, 



Monog. Melania, sp. 249. 

 Melania propinqua, Lea, Proc. Acad. Nat. Sci., p. 119, 1861. 

 Goniobasis propinqua, Lea, Journ. Acad, Nat. Sci., v, pt. 3, p. 234, t. 34, f. 



29, March, 1863. Obs. ix. p. 56. 



* May be a Pleurocera. 



tl'bis is a longer and narrower species than G. proximo,, the color is also darker. 



X Without the large series of specimens before me, I should have acquiesced in the institution of 

 propinqua as a distinct species ; but I find every grade of form between the two. The shorter 

 forms approach closely to olivula, Con., with which they have been confounded. They are dis- 

 tinguished by difference in color, and principally of texture, olicula being much heavier. 



1865.] 



