574 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXH. 



Conch., 1st ser., Ill, 1845, p. 12. *KUSTER, Conch. Cab. Unio, 1852, p. 19, 

 pi. in, fig. I. 



* Symphynota fragilis YKRUSSA.C, Guer. Mag., 1835, p. 25. 



* Metaptera fragilis CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 260. 



* Uniofrayilis var. yratilis P^ETEL, Couch. Sam., Ill, 1890, p. 153. 

 *Myaplana EATOX, Zool. Text-Book, 1826, p. 221. 



* Unio planus CONRAD, New F. W. Shells, 1834, p. 71. 



* Unio (Niiia) atrata SWAINSON, Zool. 111., 1841, pi. CLXXI. 



* Unioatratu8H.AKi.EY, Test. Moll., 1842, p. 199; *Biv. Shells, 1843, p. 199, pi. xxi, 



fig. 29. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 492. * PJ;TKL, 

 Conch. Sam., Ill, 1890, p. 145. 



Entire Mississippi Eiver drainage, St. Lawrence system; Red River 

 of the North; Hudson River; eastern Texas. 



fLAMPSILIS L^VISSIMUS Lea. 



* Symphynota kvvissima, LKA, Tr. Am. Phil. Soc., Ill, 1830, p. 444, pi. xm, fig. 23; 



*Obs., I, 1834, p. 58, pi. xm, fig. 23. SHOUT and EATOX, Transylvania Jl., 

 1831, p. 80. 



* Unio l&vissima, DESHAYES, An. sans Vert., 2d ed., VI, 1835, p. 558; 3d ed., II, 



1839, p. 675. 



* Unio Icfvissimus CONRAD, New F. W. Shells, 1834, p. 70. * HANL'EY, Test. Moll., 



1842, p. 174 ; * Biv. Shells, 1843, p. 174, pi. xxi, fig. 41.* CATLOW and REEVE, 

 Conch. Norn., 1845, p. 60.* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 498. 

 * SOWERBY, Conch. Icon., XVI, 1866, pi. XLVI, fig. 250.* B. H. WRIGHT, Check 

 List, 1888. *PyETEL, Conch. Sam., Ill, 1890, p. 156. 



* Margarita ( Unio) lawissimus LEA, Syu., 1836, p. 11; 1838, p. 13. 



* Mar gar on ( Unio) Itevissimus LEA, Syu., 1852, p. 19; 1870, p. 28. 



*Unio ohioensis SAY, Am. Conch., VI, 1834. KUSTER, Conch. Cab., 1866, p. 20, pi. 

 LXIX, fig. 5. 



* Symphynota ohioensis FERUSSAC, Guer. Mag., 1835, p. 25. 



* Metaptera ohioiensis CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 260. 



* Unio discoidens SOWERBY, Couch. Icon., XVI, 1866, pi. un, fig. 275. 



Mississippi drainage generally; eastern Texas; southern Michigan; 

 western New York. 



tLAMPSILIS ALABAMENSIS Conrad. 



* Symphynota inflata LEA, Tr. Am. Phil. Soc., IV, 1831, p. 99, pi. xiv, tig. 28; 



Obs., I, 1834, p. 109, pi. xiv, fig. 28. FERUSSAC, Goer. Mag., 1835, p. 25. 



* Metaptera inflata CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 260. 



* Margarita ( Unio) inflatm LEA, Syn., 1836, p. 11, 1838, p. 13. 



* Unio inflatus HANLEY, Test. Moll., 1842, p. 174; * Biv. Shells, 1843, p. 174, pi. xxi, 



fig. 45. "> CATLOW and REEVE, Conch. Norn., 1845, p. 60. * KUSTER, Conch. 

 Cab. Unio, 1852, p. 17, pi. H, fig. 1. * H. and A. ADAMS, Gen. Rec. Moll., II, 

 1857, p. 498. * SOWERBY, Conch. Icon., XVI, 1866, pi. XLV, fig. 246. *B. H. 

 WRIGHT, Check List, 1888. *PyETEL, Conch. Sam., Ill, 1890, p. 155. 



* Margaron ( Unio) inflatus LEA, Syn., 1862, p. 28; 1870, p. 28. 



* Unio alabamemis CONRAD, New F. W. Shells, 1834, p. 67. 1 



Alabama and Tombigbee River areas. 



1 New name given by Conrad for Unio injiatus Lea, preoccupied by Barnes. 



