NATURAL SCIENCES OP PHILADELPHIA. 29 



34. G. Christy i, Lea. 



Goniobasis Christyi, Lea, Proc. Acad. Nat. Soi., p. 269, 1862. Jour. Acad. 



Nat. Sci., v. pt. 3, p. 328, t. 38, f. 185, March, 1863. Obs. ix. p. 150. 

 Goniobasis instabilis, Lea, Proc. Acad. Nat. Sci., p. 269, 1862. Jour. Acad. 



Nat. Sci., v. pt. 3, p. 329, t. 38, f. 186, March, 1863. Obs. ix, p. 151. 



35. G. int erven iens, Lea.* 



Goniobasis interveniens, Lea, Proc. Acad. Nat. Sci., p. 268, 1862. Journ. 

 Acad. Nat. Sci., v. pt. 3, p. 320, t. 38, f. 169, March, 1863. Obs. ix. 

 p. 142. 



36. G. olive 11a, Lea. 



Goniobasis olivella, Lea, Proceed. Acad. Nat. Sci., p. 269, 1862. Journ. 

 Acad. Nat. Sci., v. pt. 3, p. 327, t. 38, f. 182, March, 1863. Obs. ix. 

 p. 149. 



37. G. interrupt a, Haldeman. 



Melania interrupta, Haldeman, Supplement to No. 1, Monog. Limniades, 



Oct. 1840. Wheatley, Cat. Shells U. S., p. 25. Jay, Cat., 4t edit., p. 



274. Brot, List, p. 34. Reeve, Monog. Melania, sp. 398. 

 Goniobasis ornatella, Lea, Proceed. Acad. Nat. Sci., p. 269, 1862. Journ. 



Acad. Nat. Sci., v. pt. 3, p. 326, t. 38, f. 181, March, 1863. Obs. ix. 



p. 148. 



38. G. cr is pa, Lea.j 



Goniobasis crispa, Lea, Proc. Acad. Nat. Sci., p. 269, 1862. Jour. Acad. 

 Nat. Sci., v. pt. 3, p. 326, t. 38, f. 180, March, 1863. Obs. ix. p. 148. 



39. G. f orm osa, Conrad. $ 



Melania formosa, Conrad, New Fresh- Water Shells, Appendix, p. 5, t. 9, f. 



3, 1834. Wheatley, Cat. Shells U. S., p. 25. Binney, Check List. 



No. 112. 

 Melania formosa, Anthony, Reeve, Monog. Melania, sp. 387. Brot, List, 



p. 35. 



40. G. mediocris, Lea. 



Goniobasis mediocris, Lea, Proceed. Acad. Nat. Sci., p. 269, 1862. Journ. 

 Acad. Nat. Sci., v. pt. 3, p. 326, t. 3S, f. 179, March, 1863. Obs. ix. 

 p. 148. 



41. G vesicula, Lea. 



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

 Goniobasis vesicula, Lea, Jour. Acad. Nat. Sci., v. pt. 3, p. 242, t. 35, f. 45, 

 March, 1863. Obs. ix. p. 64. 



42. G. Duttonii, Lea. 



Goniobasis Duttonii, Lea, Proceed. Acad. Nat. Sci., p. 266, 18$2. Journ. 

 Acad. Nat. Sci., v. pt. 3, p. 314, t. 37, f. 158, March, 1863. Obs. ix. 

 p. 136. 



43. G. laqueata, Say. 



Melania laqueata, Say, New Harmony Disseminator, p. 275, September, 

 1829. Say's Reprint, p. 17. American Conchology, No. 5, t. 47, f. 1. 

 Binney's edition, pp. 143 and 200. Binney, Check List, No. 158. De- 

 Kay, Moll. New York, p. 97. Wheatley, Cat. Shells U. S., p. 25. Jay, 

 Cat., 4th ed., p. 274. Reeve, Monog. Melania, sp. 2S1, 288? Brot, 

 List, p. 35. Catlow, Conch. Nomenc, p. 187. 



* Very like Currcyana, Lea, in the plicae, but differs in form, 

 f More convex and with more regular striae than G. nassulu, Conrad. 

 t Close to 6. nassula, Conrad, but is striate, and the aperture is more rounded. 

 | Differs from G. Tiwmeyi, Lea, in the form ot' the aperture. The specimens before me are not 

 all two-bande I, some of them being without bands, and of a light yellowish color, 



1864.] 



