634 PROCEEDINGS OF THE NATIONAL MUSEUM. 



*Attodonlahoit8alonicti LIXSI.EY, Am. Jl. Sci., 1845, p. 277. *STI MI-SON, Shells of 

 N. Eng., 1851, p. 15. * H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 502. 

 r.i.TKi., Conch. Sain., III. 1890, p. 180. 



St. Lawrence drainage; north to Lake Winnipeg; south in streams 

 flowing into the Atlantic to Virginia; not reported from Michigan. 



jANODONTA HALLENBECKII Lea. 



* Anodonta hallenbeckii LKA, Pr. Ac. N. Sci. Phila., II, 1858, p. 139; * Jl. Ac. N. 



Sci. Phila., IV, 1859, p. 232, pi. xxxn, fig. 112; *Obs., VII, 1859, p. 50, pi 

 xxxii, fig. 112. *CLESSIN, Conch. Cab. Ano., 1873, p. 95, pi. xxvin, figs. 3, 

 4.* B. H. WKIGHT, Check List, 1888.* P,F,TEL. Conch. Sam., Ill, 1890, p. 

 180. *SOWKRHY, Conch. Icon., XVII, 1869, pl.xxin, fig. 89, 483. 

 *Margaron (Anodonta) hallenbeckii LEA, Syn., 1870, p. 78. 



* \ Anodonta (jesnerli LKA, Pr. Ac. N. Sci. Phila., X, 1858, p. 139; * Jl. Ac. N. Sci. 



Phila., IV, 1859, p. 231, pi. xxxi, fig. 109. *0bs., VII, 1859, p. 49, pi. xxxi, 

 fig. 109. *CLESSIX, Conch. Cab. Ano., 1873, p. 95, pl.xxviil, figs. 1, 2. 



* B. H. WRIGHT, Check List, 1888. 



*Anodon yesneril SOWEUKY, Conch. Icon., XVII, 1867, pl.vn, fig. 15. 

 *Margaron (Anodonta) yesnerii LKA, Syn., 1870, p. 78. 



* Anodonta gessneri P^KTEL, Conch. Sam., Ill, 1890, p. 179.' 



Georgia. 



f ANODONTA DOLIARIS Lea. 2 



*Anodon1a dolearis LEA, Pr. Ac. N. Sci. Phila., VII, 1863, p. 193. 



* Anodonta doliaris LEA, Jl. Ac. N. Sci. Phila., VI, 186G, p. 24, pl.vni, fig. 23; * Obs., 



XI, 1867, p. 28, pi. YIII, fig. 23.* CLESSIN, Conch. Cab. Aao., 1874, p. 130, pi. 

 XLII, figs. 1, 2. *B. H. WRIGHT, Check List, 1888. 

 *Margaron (Anodonta) doliaris LEA, Syn., 1870, p. 81. 



North Carolina. 



t ANODONTA DARIENSIS Lea. 



*Anodonta dariensis LEA, Pr. Ac. N. Sci. Phila., II, 1858, p. 139; * Jl. Ac. N. Sci. 

 Phila., IV, 1859, p. 230, pi. xxvm, fig. 99; *Obs., VII, 1859, p. 48, pi. xxvin, 

 fig. 99. * CLESSIN, Conch. Cab. Ano., 1874, p. 118, pi. xxxvii, figs. 3, 4. 



* B. H.WRIGHT, Check List, 1888.* P/KTKL, Conch. Sani., Ill, 1890, p. 178. 

 * Anodon darwnsi* SOWERHY, Conch. Icon., XVII, 1867, pi. xvm, fig. 70. 

 *Margaron ( Anodonta) dariensis LEA, Syn., 1870, p. 80. - 



Georgia; north Florida. 



Group of Anodonta imbecillis. 



Shell thin, elliptical, sometimes slightly produced near the center of 

 the base, pointed behind, with a slight posterior dorsal wing; area of 

 the beaks generally flattened though often full; beak sculpture con- 

 sisting of several rather delicate, irregular ridges which show a tend- 

 ency to break into nodules ; epidermis bright and smooth, usually marked 



1 The type of A. hallenbeckii is a sulcate shell, somewhat constricted at the central 

 base, while that of A. gesneri is not constricted and is smoother. The former may be 

 slightly diseased, and the museum series of shells appears to absolutely connect the 

 two. 



2 First spelled dolearix by Lea, and afterwards changed by him to doliaris. 



