NO. 12U5. s Yyoi'SIS 01-' THE yj I A l)E8SIMPSuy. 537 



tLAMPSILIS APPROXIMUS Lea. 1 



* I 'tiio approj.-imun 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. * Cox HAD, Pr. 

 Ac. N. Sci. Phila.,VI, 1853, p. 245. *H. and A. ADAMS, Gen. Rec. Moll. ,11, 

 1857, p. 493.* B. H. WRIGHT, Check List, 1888.* P.ETEL, Conch. Sam., Ill, 

 1890, p. 144. 

 ' .tlargaron (Unio) approximus LEA, Syn., 1852, p. 28; 1870, p. 44. 



Southeru Louisiana; southern Alabama. 



t LAMPSILIS AFFINIS Lea.- 



I nwaffinisL,KA,VT. Am. Phil. Soc., V, 1852, p. 251; *Tr. Am. Phil. Soc., 1855, p. 

 271, pi. xix, tig. 26; * Obs.,V, 1852, p. 27, pi. xix, fig. 26. *CONRAD, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 244.* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 

 493.^ H. H. WHIGHT, Check List, 1888.* P.ETEL, Couch. Sam., Ill, 1890, p. 

 144. 

 Margaron ( I'nio) a$ni* LEA, Syn., 1852, p. 27; 1870, p. 42. 



Louisiana. 



LAMPSILIS CONTRARIUS Conrad. 3 

 I'tiio contrarius CONRAD, Jl. Ac. Nat. Sci. Phila. 1, 1850, p. 276, pl.x:;xvn, fig. 7. 



Ogeechee Kiver, Georgia. (Locality doubtful.) 



tLAMPSILIS CLAIBORNENSIS Lea. 



I'nio claihornentiisLEA, Tr. Am. Phil. Soc., VI, 1838, p. 105, pi. xxiv, fig. 115; *Obs., 



II, 1838, p. 105, pi. xxiv, fig. 115. *TROSCHKL, Arch. fiir. Naturg., V, 1839, pi. 

 u, p. 237.* HANLEY, Test. Moll., 1842, p. 192, Biv. Shells, 1843, p. 192, pi. xxi, 

 fig. 26. " CATLOW and REEVE, Conch. Norn., 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. xxm, figs. 3, 3a, 36. *SOWERBY, 

 Conch. Icon., XVI, 1868, pi. LXX, fig. 357.* B. H. WRIGHT, Check List, 1888. 



* P.ETEL, Conch. Sam., Ill, 1890, p. 148. 



* Margarita ( Unio) claibornensis LEA, Sjn., 1838, p. 19. 

 *Margaron (Unio) claibornensis LEA, Syn., 1852, p. 28; 1870, p. 44. 



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

 1843, p. 201, pi. xi, fig. 13; *Obs., Ill, 1842, p. 39, pi. XL, fig. 13. * Cox- 

 RAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 253.* H. and A. ADAMS, Gen. Rec. 

 Moll., II, 1857, p. 492. *CHENU, 111. Conch. If58, pi. xxxi, figs. 2, 2a, 26. 



* REEVE, Conch. Icon., XVI, 1865, pi. xxvi, tig. 129. * P.ETEL, Conch. Sam., 



III, 1890, p. 161. 



*Margaron (Unio) obttisua LEA, Syn., 1852, p. 39; 1870, p. 62. 



* Unio pallescenx LEA/ Pr. Am. Phil. Soc., IV, 1845, p. 164; *Tr. Am. Phil. Soc., X, 



1848, p. 79, pi. vn, tig. 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., 



1 Probably only a thin, slightly rayed or rayless variety of L. hydianiis. 



2 1 doubt if this is distinct from Jpprojrintiis. 



:J Dr. Lea places this in the synonymy of Unio lecontlanux Lea. I have never seen 

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

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

 f-pecies having reversed laterals. 



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

 thin, eroded, large shell, in had condition, but which, I feel sure, is claibornensis. 



