232 LAND AND FRESU-WATER SHELLS OF N. A. [pART IV. 



121. G. paula, Lea. 



Melania pnula. LEA,Proc. AcaJ. Nat. Sei., p. 122, 1861. Jour. Acad. Nat. Sci., v, 

 pt. 3, p. 244, t. 35, f. 48, March, 18G3. Obs., ix, p. 66. 



Description. — Shell carinate, conical, thin, diaphanous, reddish horn- 

 color; spire subelevated ; sutures slightly impressed ; whorls six, 

 acutely carinate above, the last subcarinate; whorls rather small, 

 widely elliptical, whitish within ; outer lip acute ; columella either 

 whitish or reddish, obtusely angular at the base. 

 Habitat. — Cahawba River, Alabama; E. R. Showalter, M.D. 

 Diameter, -27 ; length, -GG of an inch. 



Observations. — A very small species, about two-thirds of an inch 

 long. Four specimens are before me, nearly all of the same size and 

 Fig. 457. color. This species is very closely allied to Melania (Gonio- 

 basis) bicincta, Anth., but it is not much more than half the 

 size, and the carina below that on the middle of the whorl is 

 more indistinct. In the aperture they also differ, the bicincta 

 having it larger and more disposed to be rhombic, and having 

 indistinct bands within, which this has not. In all the specimens the 

 carina is sharp. The aperture is about two-fifths the length of the 

 shell. It reminds one also of Melania (Goniobasis) rhombica, Anth., 

 being about the same length, but that species has a single sharp 

 carina, with a less exserted spire and a larger mouth. — Lea. 



Differs from vittata, Anth., in the more rounded aperture 

 and outer lip. 



122. G. symmetrica, Haldejian. 



Melania symmetrica, Hai-deman, Monog. Lim., No. 4, p. 2 of cover, October 5, 1841. 



BiNNEY, Check List. No. 261. Jay, Cat. 4th ed., p. 275. Brot, List, p. 35. 



Reeve, Monog. INIelania, sp. 328. 

 Ceriphasia symmetrica, Haldeman, Adams, Genera, i, p. 297. 

 Melania imbricata, Anthony, Ann. N. Y. L3'c. Nat. Hist., vi, p. 105, t, 3, f. 5, March, 



1854. BiNNEY, Check List, No. 142. Brot, List, p. 36. Reeve, Monog. Mela- 

 nia, sp. 259. 

 Melania bicincta, Anthony, Proc. Acad. Nat. Sci., p. 5G, Feb., 1860. Binnet, 



Check List, No. 31. Brot, List, p. 36. Reeve, Monog. Mehniia, sp. 327. 

 Melania assimilis, Anthony, Proc. Acad. Nat. Sci., p. 60, Feb., 1860. Brot, List, 



p. 36. Reeve, Monog. Melania, sp. 464. 

 Melania assimilis, Lea (mistake), Binney, Check List, No. 22. 

 Goniohasis Ucheensis, Lea, Proc. Acad. Nat. Sci., p.. 270, 1862. Joum. Acad. Nat. 



Sci., V, pt. 3, p. .334, t. 38, f. 194, March, 1833. Obs. ix, p. 156. 

 Goniobasis Barraitii, Lea, Proc. Acad. Nat. Sci.. p. 271, 1862. Joum. Acad. Nat. 



Sci., V, pt. 3, p. 335. t. 38, f. 196, March. 1863. Obs. 9, p. 57. 

 Goniobasis Catabiea, Haldeman, Amer. Jour. Conch., vol. 1, No. 1, Feb. 25, 1835. 



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