528 PBOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



p. 496.— ^CiiENU, Man., 1859, II, p. 138, fig. 666.— * Sowerby, Conch. Icon., 

 XVI, 1868, pi. xcii, flg. 501.— 'B.H. Wright, Check List, 1888.— *P.etel, 

 Conch. Sam., Ill, 1890, p. 166. 



* Margaron (Unio) satnr Lea, Syn., 1852, p. 24; 1870, p. 37. 



Entire Mississippi drainage; St. Lawrence system; N"elson River and 

 tributaries; the variety satur in the Southwest to the Sabine River, 

 Texas. 



tLAMPSILIS EXCAVATUS Lea. 



* Unio excavatus Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p. 32; * Jl. Ac. N. Sci. Phila., 



IV, 1858, p. 71, pi. XIII, fig. 52 ; * Obs., VI, 1858, p. 71, pi. xiii, fig. 52,— *Chenu, 

 Man., 1859, II, p. 138, fig. 665.— * Sowerby, Conch. Icon., XVI, 1868, pi. lxx, 

 VII, p. 403.— *B. H. Wright, Check List, 1888.— *P^tel, Conch. Sam., Ill, 

 1890, p. 152. 

 *Margaron {Unio) excavatus Lea, Syn., 1870, p. 37. 

 *?Unio ovatus Say var. ornatus Conrad, Mouog., I, 1835, p. 4.' 

 *Unio ornatus Sowerby, Conch. Icon., XVI, 1866, pi. xxxi, fig. 162. — * B. H. 

 Wright, Check List, 



Tombigbee and Alabama river drainage. 



tLAMPSILIS BINOMINATUS Simpson.- 



. *Unio Uneatus Lea, Pr. Am. Phil. Soc, I, 1840, p. 287; *Tr. Am. Phil. Soc.,VIII, 



1842, p. 206, pi. XII, fig. 20; * Obs., Ill, 1842, p. 44, pi. xii, fig. 20.— * Conrad, 



Pr. Ac. N. Sci. Phila., VI, 1853, p. 251.— *H. and A. Adams, Gen. Eec. Moll., 



\ II, 1857, p. 497.— *Chenu, 111. Conch., 1858, pi. xxviii, figs. 1, la, lb.— 



* KusTER, Conch. Cab. Unio, 1862, p. 278, pL xciv, fig. 1.—* Sowerby, Conch. 

 Icon., XVI, 1868, pi. lxi, fig. 309.— *B. H.Wright, Check List, 1888.— 



* P^TEL, Conch. Sam., Ill, 1890, p. 157. 



* Margaron {Unio) Uneatus Lea, Syn., 1852, p. 27; 1870, p. 41. 



Chattahoochee and Flint rivers, G-eorgia. 



tLAMPSILIS CARIOSUS Say. 



Unio cariosus Say, Nich. Encyc. II, 1816, pi. iii, fig. 2.3 — Short and Eaton 

 Transylvania Jl. 1831, p. 70. — * Say, Am. Couch., VI, 1834. — ^Conrad, New 

 F. W. Shells, 1834, p. 68.— * Ferxjssac, Gner. Mag., 1835, p. 26.— * Conrad, 

 Monog. IV, 1836. p. 40, pi. xix.— * Gould, Inv. of Mass., 1841, p. Ill, fig. 72.— 

 *BiNNEY,Inv. ofMass., 1870,p. 172,fig.475.— ''EEEVE,Couch.Syst.,I,1841,p. 

 119, pi. Lxxxix, fig. 10.—* Hanley, Test, Moll,, 1842, p. 190.— '^ De Kay, Zool. 

 of N, Y,, Pt. 5, 1843, p. 193, pi. xxi, figs. 243, 244. ^—*' Hanley, Biv. Shells, 1843, 

 p. 190, pi. XX, fig. 22. — ^Catlow and Reeve, Conch. Norn., 1845, p. 57, — 

 *Kuster, Conch. Cab. Unio, 1852, p. 24, pi. i, figs. 2, 3.— "Conrad, Pr. Ac, 

 N. Sci. Phila., VI, 1835, p. 246.— * Dewey, Ninth Rep. N. Y. State Cab., 1856, 

 p.35.— *H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 493. — * Sowerby, 



' It is hard to tell just what this is, as Conrad does not figure or describe it. He 

 states that while it is probably excavatus it is not certainly so, and he does not think 

 it wise to displace Lea's jjroperly described and figured species for it. 



" Lea's name was jjreoccupied by Valenciennes (Encyc. Meth., II, 1827, p. 151, pi. 

 CCXLViii, fig. 5) for what is probably U.radiatiis. I change it to hinominatus. 



3 The first edition of Nicholson's Encyclopedia is dated 1816, fide W. G. Binney, 

 Bib. N. Am. Conch., I, 1863, j). 25, and by Lea, Synopsis, 4th ed., pp. 154, 159. 



''The figures are very probably taken from U. ventricosus. 



