NO. 1205. SYNOrSIS OF THE XATADES— SIMPSON. 547 



* Margarita {Unio) nashvillianus Lea, Syu., 1836, p. 26; 1838, p. 20. 



* Margaroii ( Unio) nasliviUianus Lka, Syn., 1852, i>. 29. 



^ Margaron ( Unio) naslivilliensis Lea, Syu., 1870, p. 4.5. 



t* Unio mississippiensis Coxrad, Jl. Ac. N. Sci. Phila., I, 1850, p. 277, pi. xxxviii, 



fig. 11.— "CoxRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 252.— «H. and A. 



Adams, Gen. Rec. Moll., II, 1857, p. 494. — *Kuster, Conch. Cab. Unio, 1861, 



p. 245, pi. Lxxxii, fig. 3. — *Eeeve, Conch. Icon., XVI, 1865, pi. xix, fig. 85. — 



*B. H.Wright, Check List, 1888.—" P.etel, Conch. Sam., Ill, 1890, p. 159. 

 "Margaron (Unio) mississippiensis Lea, Syn., 1852, p. 29; 1870, p. 60. 

 *Unio ruiersvillensis Lea, Pr. Ac. N. Sci. PhLla., Ill, 18.59, p. 1.55; *J1. Ac. N. Sci. 



Phila., IV, 1860, p. 355, pi. ix, fig. 181; *Obs., A^II, 1860, p. 38, pi. lx, fig. 



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

 ^ Margaron ( Unio) rutersi-iUensis Lea, Syn., 1870, p. 43. 

 t*Z7n(o iopekaensis Lea, Pr. Ac. N. Sci. Phila., XII, 1868, p. 144; * JL Ac. N. Sci. 



Phila., VI, 1869, p. 313, pi. xlix, fig. 126; "Obs., XII, 1869, p. 73, pi. xlix, 



fig. 126.— "B. H.Wright, Check List, 1888. 

 '^Margaron ( Unio) topelaensis Lea, Syn., 1870, p. 43. 

 ^Unio eocoduensis Reeve, Conch. Icon., XVI, 1865, pi. 24, fig. 117. 



Entire Mississippi drainage north to about latitude 41°. Eastern 

 half of Texas. 



t*LAMPSILIS LIENOSUS Conrad. 



*Cwio lienosus Conrad, Am. Jl. Sci., XXV, 1834, p. 3.39, pi. i, fig, 4; *New 

 F. W. Shells, 1834, p. 70.—* Ferussac, Guer. Mag., 1835, p. 25.—* Conrad, 

 Monog. VII, 1836, p. 60, pi. xxxiv, fig. 2.—* Moller, Syn. Nov. Gen., 1836, p. 

 197.— ^Hanley, Test. Moll., 1842, p. 194 ; *Biv. Shells, 1843, p. 194, pi. xxi, fig. 

 32. — *Catlow and Reeve, Conch. Nom., 1845, p. 60.— *Kuster, Conch. Cab. 

 Unio, 1852, p. 67, pi. xvi, fig. 3.—* Conrad, Pr. Ac. N. Sci. Phila., VI, 1853, 

 p. 251.— *H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 494. — *Sowerby, 

 Conch. Icon., XVI, 1866, pi. xxxii, fig. 166; 1868, pi. lxxv, fig. 388.— *B. H. 

 Wright, Check List, 1888.— ^Pjetel, Conch. Sam., Ill, 1890, p. 157. 



'' Margarita ( Unio) lienosus Lea, Syn., 1836, p. 26; 1838, p. 20. 



^Margaron {Unio) lienosus Lea, Syn., 1852, p. 29; 1870, p. 45. 



*Unio saxeus CONRAD, Monog., XII, 1840, p. 109, pi. lx, fig. 1; Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 257.—* H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 494.— 

 *B. H. Wright, Check List, 1888.— *P.etel, Conch. Sam., Ill, 1890, p. 166, 



^Margaron (Unio) saxeus Lka, Syn., 1852, p. 27; 1870, p. 42. 



*Unio caliginosus Lea, Pr. Am. Phil. Soc, IV, 184.5, p. 165; *Tr. Am. Phil. Soc, X, 

 1848, p. 79, pi. VII, fig. 21; *Obs., IV, 1848, p. 53, pi. vii, fig. 21.— * Conrad, 

 Pr. Ac. N. Sci. Phila., VI, 1853, p. 246.— *H. and A.Adams, Gen. Rec. MolL, 

 II, 1857, p. 493.— *KusTER, Conch. Cab. Unio, 1861, p. 180, pi. lvi, fig. 7.— 

 * B.H.Wright, Check List, 1888,— *PiETEL, Conch. Sam., Ill, 1890, p. 147, 



*Margaron ( Unio) caliginosus Lea, Syn., 1852, p. 29; 1870, p, 45. 



*Unio fontanus Coxrad,' Am. Jl. Sci., II, 1866, p. 279, pL xv, fig. 13.— *B. H. 

 Wright, Check List, 1888. 



LAMPSILIS LIENOSUS var. UNICOSTATUS B. H. Wright. 



*Unio unicostatus B. H. Wright, Naut., XIII, 1899, p. 69. 



Lower Mississippi River drainage north to the lower Ohio; east to 

 southwest Georgia. 



^ The characters are poor in the indifferent type in the Academy of Natural 

 Sciences in Philadelphia, but I believe that it is a Lampsilis lienosus. 



