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Syaonymy of the Species of STREPOMATID^, a Family of Fluviatila MollTisca 

 inhabiting North America. 



Part 2. 



BY GEORGE W. TRYON, JR. 



Goniobasic Section. 



Genus GONIOBASIS, Lea. 



Goniobasis, Lea, Proc. Acad. Nat. Sci. p. 262, May, 1862, Journ. Acad. Nat. 



Sci. V. pt. 3, p. 217, March, 1863. Obs. ix. p. 39. 

 Ceriphasia, Swainson, (sp.) H. and A. Adams, Genera i. p. 298, Feb. 1854. 



Chenn, Man. de Conchyl. i. p. 290, 1859. 

 Pachycheihis, Lea, (sp.) H. and A. Adams, Genera i. p. 298, Feb. 1854. 

 Potadoma, Swainson, (sp.) II. and A. Adams, Genera i. p. 299, Feb. 1854. 



Chemi, Man. de Conchyl. i. p. 290, 18.''j9. 

 Elimia, (sp.) H. and A. Adams, Genera i. p. 300, Feb. 1854. Chenu, Man. 



de Conchyl. i. p. 290, 1859. 

 Melasma, (sp.) H. and A. Adams, Genera i. p. 300, Feb. 1854. Chenu, Man. 



de Conchyl. 1. p. 292, 1859. 

 Hemisinus, Swainson, (sp.) H. and A. Adams, Genera i. p. 302, Feb. 1854. 

 Juga, (sp.) H. and A. Adams, Genera i. p. 304, Feb. 1854. Chenu, Man. de 



Conchyl. i. p. 293, 1859. 

 Megara, (sp.) H. and A. Adams, Genera i. p. 306, Feb. 1854. Chenu, Man. 



de Conchyl. i. p. 293, 1859. 

 Pleurocera, Rafinesque, Haldeman, Proc. Acad. Nat. Sci. p. 274, 1863. 

 Melania, (sp.) Auct.* 



Species. 



A. Shell spirally ridged. 



1. G. procissa, Anthony. f 



Melania procissa, Anthony, Ann. Lye. Nat. Hist. N. Y. vi. p. 109, t. 3, f. 9, 

 March, 1854. Binney, Check List, No. 218. Bret, List, p. 59. Reeve, 

 Monog. Melania, sp. 342. 



B. Shell tuberculate or nodulous. 



2. G. g r a t i s a, Lea. 



Melania gratiosa. Lea, Proc. Acad. Nat. Sci. p, 122, May, 1861. 

 Goniobasis gratiosa, Lea, Jour. Acad. Nat. Sci. v. pt. 3, p. 241, t. 35, f. 43, 

 March, 1863. Obs. ix. p. 63. 



2a. G. 1 a c h r y m a, Anthony. J 

 Melania lachryraa, Anthony, Reeve, Monog. Melania, sp. 473, May, 1861. 

 Brot, List, p. 32. 



3. G. gibber OS a. Lea. 



Goniobasis gibberosa, Lea, Proc. Acad. Nat. Sci. p. 266, 1862. Jonr. Acad. 

 Nat. Sci. V. pt. 3, p. 312, t. 37, f. 155, March, 1863. Obs. ix. p. 134, 

 t. 37, f. 155. 



* Mr. Lea is the first naturalist who has properly defined this genus, anil his name Goniobasis 

 must therefore stand, in preference to auy of the prior names given to artifi -ial set-tions by the 

 Messrs. Adams. 



Of course these gentlemen are wrong in including species of this genus in the genera Pachy- 

 chiilus, Ceriphasia, Pntudoina and flemifinus, which are all intended to embrace vvTy different 

 groups of species. Prof tialdeman is also mistaken in placing here the Pleurocera of Kafinesque, 

 a genus which undoubtedly ~ Trjipanoi-toma, TiCa. 



t This may be only an elevated form o{ Anculona conaliferc. Anthony. 



t This species and the preceding (ffnitiosa) are identicil. Both descriptions bear the same date 

 of publication, and I am therefore unable to decide which has priority. 



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