NO. 1205. SYNOPSIS OF THE XA I ADES—SIMPSOX. 537 



tLAMPSILIS APPROXIMUS LeaJ 



* Unio a]jpro.nmu» Lea, Pr. Am. Phil. Soc, IV, 1845, p. 164; " Tr. Am. Pliil. Soc, X, 



1848, p. 74, pi. V, fig. 13; * Obs., IV, 1848, p. 48, pi. v, fig. 13.—* Coxrau, Pr. 

 Ac. N. Sci. Phila.jVI, 1853, p.245.— "H. and A. Adams, Gen. Eec. Moll., II, 

 1857, p. 493.—* B. IT. Wright, Check List, 1888.—* Pjetel, Conch. Sam., Ill, 

 1890, p. 144. 



* Jiargaron ( Unio) apiyroximns Lea, Syn., 1852, p. 28; 1870, p. 44. 



Southern Louisiana; southern Alabama. 



t LAMPSILIS AFFINIS Lea.2 



*r«ioa#HisLEA,Pr. Am. Phil. Soc, V, 1852, p. 251; *Tr. Am. Phil. Soc, 1855, p. 



271, pi. XIX, fig. 26; * Obs., V, 1852, p. 27, pi. xix, fig. 26.— * Conrad, Pr. Ac. 



N. Sci. Phila., VI, 1853, p. 244.— *H. autl A. Adams, Gen. Eec: Moll., II, 1857, p. 



493._*B. H. Wright, Check List, 1888.—* P.etel, Conch. Sam., Ill, 1890, p. 



144. 

 2Iargaron ( Unto) uffinis Lea, Syn., 1852, p. 27 ; 1870, p. 42. 



Louisiana. 



LAMPSILIS CONTRARIUS Conrad.3 

 Tnio contrarius Conrad, Jl. Ac. Nat. Sci. Pliila. 1, 1850, p. 276, pi. x:!lXV1i, fig. 7. 



Ogeechee River, Georgia. (Locality doubtful.) 



tLAMPSILIS CLAIBORNENSIS Lea. 



Uiiio claihornensis Libia, Tr. Am. Phil. Soc, VI, 1838, p. 105, pi. xxiv, fig. 115; *Obs., 

 II, 1838, p. 105, pi. XXIV, fig. 115.— *Troschkl, Arch. fur. Naturg,, V, 1839, pi. 



II, p. 237.—* Hanley, Test. Moll., 1842, p. 192, Biv. Shells, 1843, p. 192, pi. xxi, 

 fig. 26.—" Catlow and Reeve, Conch. Nom., 1845, p. 57.—* Conrad, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 246.—* H. and A. Adams, Gen. Rec Moll., II, 1857, 

 p. 493.— *Chenu, 111. Conch., 1858, pi. xxiii, figs. 3, da, 3h. — *Sowerby, 

 Couch. Icon., XVI, 1868, pi. lxx, fig. 357.—* B. H. Wright, Check List, 1888,— 

 *P.etel, Couch. Sam., Ill, 1890, p. 148. 



^Margarita ( Unio) daihornensis Lea, Sj n., 1838, p. 19. 



*Margaron {Unio) claibornensis Lea, Syn., 1852, ]). 28; 1870, p. 44. 



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

 1843, p. 201, pi. XI, fig. 13; *Obs,, III, 1842, p. 39, pi. xi,, fig. 13.— * Con- 

 rad, Pr. Ac. N. Sci. Phila,, VI, 1853, p. 253. — *H. and A. Adams, Gen. Rec. 

 Moll., II, 1857, p. 492.— *Chenu, 111. Conch. 1^.58, pi. xxxi, figs. 2, 2a, 2b.— 

 * Reeve, Conch. Icon., XVI, 1865, pi. xxvi, fig. 129.—* P.etel, Conch. Sam., 



III, 1890, p. 161. 



*Margaron (Unio) ohtusus Lea, Syn., 1852, p. 39; 1870, p. 62. 



* Unio pallescens Lea.-i Pr. Am. Phil. Soc, IV, 1845, p. 164 ; *Tr. Am. Phil. Soc, X, 

 1848, p. 79, pi. VII, fig. 20; * Obs., IV, 1848, p. 79, pi. VII, fig. 20.— * Conrad, 

 Pr. Ac. N. Sci. Phila., VI, 1853, p. 254.—* H. and A. Adams, Gen. Rec. Moll., 



' Probably only a thin, slightly rayed or rayless variety of L. liydianus. 



2 1 doubt if this is distinct from Approximus. 



^Dr. Lea places this in the synonymy of Unio lecontianus Lea. I have never seen 

 an authentic shell, but the figure given by Conrad in the Journal seems to me more 

 like Lampsilis oitusus, aud I am inclined to think it is a small male specimen of this 

 S"pecies having reversed laterals. 



■'There is only a single specimen in the Lea collection, the type, an old, rather 

 thin, eroded, large shell, in bad condition, Init which, I feel sure, is claibornensis. 



