528 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XXII. 



p. 496. *("'HEXU, Man., 1859, II, p. 138, fig. 666. * SOWERBY, Conch. Icon., 

 XVI, 1868, pi. xcii, fig. 501. *B. H. WRIGHT, Check List, 1888. *P.ETEL, 

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



* Haryaron ( Unio) satitr LEA, Syn., 1852, p. 24; 1870, p. 37. 



Entire Mississippi drainage; St. Lawrence system; Nelson River and 

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

 Texas. 



tLAMPSILIS EXCAVATUS Lea. 



* Unio excavatus LEA, Pr. Ac. N. Sci. Phila., IX, 1857, p. 32 ; * .11. Ac. N. Sci. Phila., 



IV, 1858, p. 71, pi. xin, fig. 52; *Obs., VI, 1858, p. 71, pi. xm, fig. 52. *CiiKxu, 

 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) excaralus LEA, Syn., 1870, p. 37. 

 *fUnio ovatus SAY var. ornatiis CONKAD, Moiiog., I, 1835, p. 4. 1 

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

 WRIGHT, Check List, 1888. 



Tombigbee and Alabama river drainage. 



tLAMPSILIS BINOMINATUS Simpson/-' 



*Unio lineatus 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. xn, fig. 20.* COXRAP, 

 Pr. Ac. N. Sci. Phila., VI, 1853, p. 251. *H. and A. ADAMS, Gen. Rec. Moll., 

 II, 1857, p. 497. *CHEXU, 111. Conch., 1858, pi. xxyin, figs. 1, la, 16. 



* KUSTER, Conch. Cah. Unio, 1862, p. 278, pi. xciv, fig. 1.* SOWERBY, Conch. 

 Icon., XVI, 1868, pi. LXI, fig. 309.* B. H. WRIGHT, Check List, 1888, 



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



* Margaron (Unio) lineatus LEA, Syn., 1852, p. 27; 1870, p. 41. 



Chattahoochee and Flint rivers, Georgia. 



t LAMPSILIS CARIOSUS Say. 



Unio cario8U8 SAY, Nich. Encyc.. II, 1816, pi. in, fig. 2. 3 SHORT and EATON 

 Transylvania Jl. 1831, p. 70. * SAY, Am. Conch., VI, 1834. * CONRAD, New 

 F. W. Shells, 1834, p. 68. * FERUSSAC, Guer. Mag., 1835, p. 26. * CONRAD, 

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

 *BiNNEY,Inv. of Mass., 1870, p. 172, fig. 475. *REEVE, 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, 



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

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

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



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

 CCXLVIII, fig. 5) for what is probably U. radiatus. I change it to binominatus. 



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

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



The figures are very probably taken from U. ventrivosus. 



