71 B TROCEEBINCR OF THE NATIONAL MFSEFM. voL.xxit. 



* Unio limatidus Conrad, Pr. Ac. N. Sci. Phila., IV, 1849, p. 154; "Ann. and 



Mag., IV, 1849, p. 301; *J1. Ac. N. Sci. Phila., I, 1850, p. 276, pi. xxxvii, 

 fig. 9; ' Pr. Ac. N. Sci. Phila., VI, 1853, p. 251. — =- H. and A. Adams, Gen. 

 Rec. Moll., II, 1857, p. 493.— *B. H. Wright, Check List, 1888.— * P^tel, 

 Conch. Sam., Ill, 1890, p. 157. 



* Mar gar on ( Unio) Ihnatulus Lea, Syn., 1852, p. 32; 1870, p. 52. 



* t Unio whiteianus LEA,Tr. Am. Phil. Soc, X, 1852, p. 258, pi. xiv, fig. 8.—* Obs., V, 



1852, p. 14, pi. XIV, fig. 8.— *H. and A. Adams, Gen., Rec. Moli., II, 1857, 

 p.493.— *B. H. Wright, Check List, 1888. — ■ PiETEL, Conch. Sam., Ill, 1890, 

 p. 172. 

 * Margaron ( Unio) tvhiteianus Lea, Syn., 1852, p. 33; 1870, p. 53. 



* Unio vihex Conrad, Pr. Ac. N. Sci. Phila., VI, 1853, p. 260.' 



" t Unio similis Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p. 169; * Jl. Ac. N. Sci. Phila., 

 IV, 1858, p. 91, pi. XIX, fig. 71; * Obs., VI, 1858, p. 91, pi. xix, fig. 71.— * B. H. 

 Wright, Check List, 1888.—* Pjetel, Conch. Sam., Ill, 1890, p. 167. 



* Margaron ( Unio) similis Lea, Syn., 1852, p. 52 ; 1870, p. 53. 



* t Unio protensus Lea, Pr. Ac. N. Sci. Phila., IX, 1865, p. 88 ; * Jl. Ac. N. Sci. Phila., 



VI, 1868, p. 256, pi. XXXI, fig. 71 ; ' Obs., XII, 1869, p. 16, pi. xxxi, fig, 71.— *B. 

 H. Wright, Check List, 1888-. . 



* Margaron ( Unio) protensus Lea, Syn., 1870, p. 60. 



* t Unio radiolus Lea, Pr. Ac. N. Sci. Phila., 1, 1871, p. 192; ' Jl. Ac. N. Sci. Phila., 



VIII, 1874, p. 21, pi. VI, fig. 18 ; * Obs., XIII, 1874, p. 25, pi. vi, fig. 18.—* B. H. 

 Wright, Check List, 1888. 



North Carolina to Florida. 



tUNIO INSULSUS Lea. 



" Unio insulsus Lea, Pr. Ac. IS. Sci, Phila., 1, 1857, p. 86; * Jl. Ac. N. Sci. Phila., IX, 

 1862, p. 53, pi. I, fig. 199; * Obs., VIII, 1862, p.57,pl. i, fig. 199.— '^B. H. Wright, 

 Check List, 1888.—* Simpson, Pr. U. S. Nat. Mus., XV, 1892, p. 422, pi. lxv, 

 figs. 1, 5. 



* Margaron ( Utiio) insulsus Lea, Syn., 1870, p. 53. 



*t? Unio lucidus Lea,^ Pr. Ac. N. Sci, Phila., VII, 1863, p. 192; "Jl. Ac. N. Sci. 



Phila., VI, 1866,p. 9, pi. ii, fig. 6; "^Obs., XI, 1867, p. 13, pi. ii, fig. 6.— *B. H. 



Wright, Check List, 1888. 

 ''Margaron ( Unio) lucidus Lea, Syn , 1870, p. 48. 

 " t Unio cistelUformis Lea, Pr. Ac. N. Sci. Phila., VII, 1863, p. 192 ; * Jl. Ac. N. Sci. 



Phila., VI, 1866, p. 19, pi. vi, fig. 17; * Obs., XI, 1867, p. 23, pi. vi, fig. 17.— 



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



* Margaron {Unio) cisieUiformis Lea, Syn., 1870, p. 52. 



North Carolina to Florida. 



tUNIO OBNUBILUS Lea. 



*Unio ohnubilus Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p. 169; * Jl. Ac. N. Sci. 

 Phila., IV, 1858, p. 84, pi. xvii, fig. 64 ; * Obs., VI, 1858, p. 84, pi. xvii, fig. 64.— 

 * Simpson, Pr. U. S, Nat. Mus., XV, 1892, p. 424, pi. lxvi, fig. 3. 



^Margaron (Unio) obnuhilus Lea, Syn., 1870, p. 53. 



* t Unio opacus Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p, 169 ; * Jl, Ac. N. Sci. Phila., 



IV, 1858, p. 86, pi. XVIII, fig. 66; * Obs., VI, 1858, p. 86, pi. xviii, fig. 66.— 

 *B. H. Wright, Check List, 1888.— * P.etel, Conch. Sam., Ill, 1890, p. 161. 



' Conrad here states that his vibex =^&rst whiteianus of Lea, and then zeiglerianus of 

 Lea. The latter is totally different from whiteianus. 

 ^ Very near U. confertns. It is probably a delicate, light-colored, rayed insulsus. 



