708 PROCEEDINGS OF THE NATIONAL MUSEUM. 



*t Unto corvus LEA, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 112; Ml. Acad. N. Sci., 

 Phila., IV, 1859, p. 217, pi. xxvn, tig. 97; Obs.,VII, 1859, p. 35, pi. xxvn, fig. 

 97. *SO\VERBY, Conch. Icon., XVI, 1868, pi. LXXVIII, fig. 411. *B. H. 

 WRIGHT, Check List, 1888. * P.ETEL, Conch. Sam., Ill, 1890, p. 149. 



*Margaron ( Unio) corvus LEA, Syn., 1870, p. 37. 



* I'nio restitus LKA, Pr. Ac. N. Sci., Phila., V, 1861, p. 393; * Jl. Ac. N. Sci., Phila., 



V, 1862, p. 189, pi. xxv, fig. 259; * Obs., IX, 1863, p. 11, pi. xxv, fig. 259. 

 *B. H. WRIGHT, Check List, 1888. 

 Margaron ( Unio) vestiltts LEA, Syn., 1870, p. 50. 



Streams from the Congaree River, South Caroliua, south to northern 

 Florida. 



tUNIO DANIELSII B. H. Wright. 



I nio danielsii B. H. WRIGHT, Naut., XIII, 1899, p. 31. 

 Spring Creek, Decatur County, Georgia. 



fUNIO PUSILLUS Lea. 1 



* Unio pii8illu8 LEA, Pr. Ac. N. Sci. Phila., 1,1840, p. 286 ; * Tr. Am. Phil. Soc., VIII, 



1842, p. 220, pi. xvin, fig. 36; *Obs., Ill, 1842, p. 58. pi. xvm, fig. 36. CON- 

 RAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 256.* H. and A. ADAMS, Gen. Kec. 

 Moll., II, 1857, p. 494. * CHENU, 111. Conch., 1858, pi. xxxn, figs. 5, 5o, 56. 



* KUSTER, Conch. Cab., 1861, p. 197, pi. LXIII, figs. 3, 4.* B. H.WRIGHT, Check 

 List, 1888.* P.ETEL, Conch. Sam., Ill, 1890, p. 164.* SIMPSON, Pr. U. S. Nat. 

 MUB., XV, 1892, p. 411. pi. LI, tigs. 2, 6. 



*Margaron ( Unio) pusillus LEA, Syn., 1852, p. 31 ; 1870, p. 48. 



*MJnio buxeus LEA, Tr. Am. Phil. Soc., X, 1852, p. 261, pi. xv, fig. 13; *Obs.,V, 

 1852, p. 17, pi. xv, fig. 13.* CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 245. 



* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 493. *B. H. WRIGHT, Check 

 List, 1888.* P.*:TEI., Conch. Sam., Ill, 1890, p. 147. 



* Margaron ( Unio) bnxeus LEA, Syn., 1852, p. 29; 1870, p. 46. 



" t I'nio anthonyi LEA, Pr. Ac. N. Sci. Phila., V, 1861, p. 41 ; Ml. Ac. N. Sci. Phila., V, 

 1862, p. 197, pi. xxvn, fig. 266; * Obs., IX, 1863, p. 19, pi. xxvn, fig. 266. * B. H. 

 WRIGHT, Check List, 1888. 



Margaron ( Unio) anthonyi, LEA, Syu., 1870, p. 43. 



Abbeville district, South Caroliua; south to northern Florida. 



tUNIO MERUS Lea. 



* Unio merits LEA, Tr. Am. Phil. Soc., X, 1852, p. 260, pi. xv, fig. 10; * Obs., V, 



1852, p. 16, pi. xv, fig. 10.* CONRAD, Pr. Acad. N. Sci. Phila., VI, 1853, 

 p. 252.* B. H. WRIGHT, Check List, 1888.* P.ETEL, Conch. Sam., Ill, 

 1890, p. 159, 



* Margaron ( Unio) merus LEA, Syn.. 1870, p. 54. 



M Unio castus LEA, Pr. Ac. N. Sci. Phila., IV, 1860, p. 306; * Jl. Ac. N. Sci. 

 Phila., IV, 1860, p. 349, pi. LVH, tig. 174; * Obs., VIII, 1860, p. 31, pi. LVII, 

 tig. 174.* B. H. WRIGHT, Check List, 1888. 



* Margaron ( Unio) castus LEA, Syn., 1870, p. 40. 



South Carolina. 



1 The type is a young shell identical with one of Lea's U. anthonyi. The type of 

 the latter is a little larger, lighter colored, and less rayed. 



