35 



Synonymy of the Species of STREPOMATID.ffi, a Family of Fluviatils Mollusca 

 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. 



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



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

 Potadoma, Swainson, (sp.) II. and A. Adams, Genera i. p. 299, Feb. 1834. 



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

 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. i. 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, FeL. 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, Haldernan, Proc. Acad. Nat. Sci. p. 274, 1863. 

 Melania, (sp.) Auct.* 



SPECIES. 

 A. Shell spirally ridged. 



1. G. p r o c i s s a, 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. Brot, List, p. 59. Reeve, 

 Monog. Melania, sp. 342. 



B. Shell tuberculate or nodulous. 



2. G. g r a t i o 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. lachryma, Anthony. J 



Melania lachryma, 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. Jour. 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, and his name Goniobasis 

 must therefore stand, in preference to any of the prior names given to artificial sections by the 

 Messrs. Adams. 



genus which undoubtedly = Trypanostnma. Lea. 



t This may be only an elevated form of Anculosa canaUfera, Anthony. 

 J This species and the preceding (gratiosa) are identical. Both descripti 



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



. 

 riptions bear the same date 



