NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSOX. 659 



suddenly behind, and back of these there are flue radiating ridges; 

 epidermis smooth, shining, often rayed; hinge line slightly incurved in 

 front of the beaks, edentulous or bearing the merest rudiments of 

 teeth; muscle scars shallow, irregular; nacre bluish white. 



Animal with marsupium occupying the outer and sometimes the four 

 leaves of the branchiae; ovules more numerous in the outer, the whole 

 pad like; gills large, inner semicircular, free from the abdominal sac, 

 or united to it; branchial opening large, with many small papillie; 

 anal opening with well-developed papiliie. 



t ANODONTOIDES FERUSSACIANUS Lea. 



*An.odonta feriissaciana Lea, Tr. Am. Phil. Soc. V, 1834, p. 45, pi. vi, fig. 15; * Obs., 



1, 1834," p. 1.57, pi. VI, p. 15.— *Hanley, Test. Moll., 1842, p. 218.— *Catlow 

 aud Eeeve, Coiicli. Nom., 1845, p. 66.— Conrad, Pr. Ac. Nat. Sci. Phila., VI, 

 1853, p. 264.— "H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 502.— ^-Mus- 

 grove, Phot. Conch., 1863, pi. i, fig. 15.— ^'Clessin, Couch. Cab. Ano., 1873, 

 p: 75, pi. XXIII, fig. 4, — *B. H. Wright, Check List, 1888. — *P.etel, Couch. 

 Sam.,IlI, 1890, p.l79. 



*Anodon feriissaciana De Kay, Zool. of N. Y., Pt. 5, 1843, p. 200, pi. xvi. fig. 230.— 



SowERBY, Couch. Icon., XVII, 1867, pi. XIV, fig. 51. 

 * Marc/arita {Anodonia) ferussaciano. Lea, Syn., 1836, p. 51 ; 1833, p. 30. 

 *Marcjaroii {Anodonta) feriissaciana Lea, Syn., 18.52, p. 50; 1870, p. 79. 

 * Anodontoides ferussacianus Baker, Moll. Chicago, Pt. 1, 1898, p. 72, pi. iii, fig. 6; v, 



fig. 2. 

 * t Anodonta luclianensis Lea, Tr. Am. Phil. Soc, VI, 1838, p. 47, pi. xiv, fig. 43; 



" Obs., II, 1838, p. 47. pi. xiv, fig. 43.—* Troschel, Arch, fur Nat., V, 1839, Pt. 



2, p. 238.—* Haxley, Test. Moll., 1842, p. 223; Biv. Shells, 1843, p. 223.— * Cat- 

 low and Reeve, Conch. Nom., 1845, p. 66. — * Conrad, Pr. Ac. Nat. Sci. Phila., 

 VI, 1853, p. 263.— "H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 503.— *Sow- 

 ERBY, Conch. Icon., XVII, 1869, pi. xxiv, fig. 92.— *B. H. Wright, Check 

 List, 1888.— *P^TEL, Conch. Sam., Ill, 1890, p. 177. 



*Mar()arita {Anodonta) huchancnsis Lea, Syn., 1836, p. 54; 1838, p. 32. 

 ^Margaron {Anodonta) hiichanensis Lea, Syn., 1852, p. 51; 1870, p. 82. 

 ""i Anodonta argenfea 'Lf.a, Pr. Ac. Nat. Sci. Phila., I, 1840, p. 289; *Tr. Am. PhiL 

 Soc, VIII, 1842, p. 223, pi. xix, fig. 41 ; * Obs., Ill, 1842, p. 61, pi. xix, fig. 41.— 



* H. aud A. Adams, Gen. Rec. Moll., II, 1857, p. 502. — * Clessin, Couch. Cab. 

 Auo., 1876, p. 218, pi. lxxii, figs. 3, 4.— *B. H. Wright, Check List, 1888.— 

 ^PiETEL, Conch. Sam., Ill, 1890, p. 176. 



^Margaron {Anodonta) argentea Lea, Syu., 18.52, p. 50; 1870, p,79. 



'" StropMtus argenteus Conrad, Pr. Ac. Nat. Sci. Phila., VI, 1853, p. 262. 



*\ Anodonta ferriiginea Lea, Pr, Am. Phil. Soc, 1, 1840, p. 289; * Tr. Am. Phil. Soc, 

 VIII, 1842, p. 225, pi. XIX, fig. 43; *Obs., Ill, 1842, p. 63, pi. xix, fig. 43.— 

 ■Conrad, Pr. Ac. Nat. Sci. Phila., VI, 18.53, p. 264. — * H. aud A. Adams, Gen. 

 RecMoll., IL 1857, p. 502.— ^MusGiiOVE, Phot. Conch., 1863, pi. i, fig. 2.— 



* Clessin, Couch. Cab. Ano., 1876, p. 219, pi. lxxii, figs. 5, 6. — *B. H. 

 Wright, Check List, 1888.— * PiETEL, Conch. Sam., Ill, 1890, p. 179. 



*Margaron {Anodonta ) ferruginea IjTEA, Syn., 18.52, p. 50; 1870, p. 79. 



*\Anodonta pUcuia Haldeman, Jl. Ac. Nat. Sci. Phila., VIII, 1842, p. 201.— * CoN- 

 EAD, Pr.AcNat.Sci. Phila., VI, 1853, p.264.— * B. H, Wright, Check List, 1888. 



*Margaron {Anodonta) pUcafa Lea, Syu., 1870, p. 79. 



^\ Anodonta denigrata Lea, Tr. Am. Phil. Soc, X, 1852, p. 285, pi. xxv, fig. 45; 

 *Obs.,V, 1852, p. 41, pi. xxv, fig.45.— *C()NRAD, Pr. Ac. Nat. Sci.Phila., VI, 

 1853, p. 264.—* H. aud A. Adams, Gen. Rec. Moll., II, 18.57, p. 502.—* Clessin, 



