81 



198. G. semicarinata, Say. 



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

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

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



199. G. Hald em an i, Tryon. 



Goniobasis Hahlemani, Tryon, Am. Journ. Concli. 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 X i m a, Say. 



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



208a. G. rufescens, Lea.f 



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



209. G. Virginica, Gmel. 



Buccinum Vinjinica, Gmel. Syst. Nat. p. 3505. Scliroter, Einleit. i. p. 414, 

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

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



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



lo 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. S u 1 c o s a. Leu. 



Ceriphasia sulcosa, 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, Troscliel, Arcliiv fur Naturgesch. ii. p. 227. 

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



J. Heavy, pupceform or cylindrical species. 



217. G. cylin drace a, Conrad. 



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

 Miiller, Synopsis, p. 47, 1836. Biimey, 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. 50. Binney, Check List, No. 190. 



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



Melania pupoidca, 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. Sei., 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 Plcurocera. 



fThis is a lunger and narrower specieg than G. proxima, the color is also darker. 



t Without the large series of spei-imens before me, I .■ihould have acquiesced in the institution of 

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

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

 tinguished by difference in color, and princi]iiilly of texture, olivula being much heavier. 



