774 I'HO CE ED INGS OF THE JV A TIONA L M USE UM. VOL. xxu. 



tQUADRULA METANEVRA Rafinesque. 



* Obliqtiaria (Quadrula) melanevra RAFINESQUK, Ann. Gen. Sci. Brnx., V, 1820, p. 



305, pi. LXXXI, figs. 15, 16.' *CHENU, Bib. Conch., 1st ser., Ill, 1845, p. 18, 

 pi. n, figs. 15, 16. 



* Unio ( Theliderma) melanerra SWAINSON, Treat, on Mai., 1840, p. 268, figs. 50, 54&. 

 *Unio metanever SHORT and EATON, Transylvania Jl., 1831, p. 76. * CONRAD, 



New F. W. Shells, 1834, p. 70. *HANLEY, Test. Moll., 1842, p. 179; *Biv. 

 Shells, 1843, p. 179, pi. xxi, fig. 31. * CONRAD, Pr. Ac. N. Sci. Phila., VI, 

 1853, p. 252. * REEVE, Conch. Icon., XVI, 1864, pi. VII, fig. 25. *P.ETEL, 

 Conch. Sam,, III, 1890, p. 159. 



* Margarita (Unio) metanever LEA, Syn., 1836, p. 15; 1838, p. 15. 



*Unio metanei-rus SAY, Am. Couch., VI, 1834. *FERUSSAC, Gner. Mag., 1835, p. 



27. * CONRAD, Monog., I, 1835, p. 10, pi. v, fig. 2.* H. and A. ADAMS, Gen. 



Rec. Moll., II, 1857, p. 497. * CALKINS, Pr. Ottawa Ac. N. Sci., 1874, p. 43. 



*B. H. WRIGHT, Check List, 1888. CALL, Tr. Acad.N. Sci. St. Louis, VII, 



1895, p. 28, pi. x. 



* Margaron (Unio) metanecrus LEA, Syn., 1852, p. 22; 1870, p. 33. 

 *Unio melanirer CATLOW and REEVE, Conch. Norn., 1845, p. 61. 

 *Unio metancurus KUSTER, Couch. Cah. Unio, 1852, p. 50, pi. x, fig. 4. *PjiTEL, 



Conch. Sam., Ill, 1890, p. 159. 

 *f Unio nodosus BARNES, Am. Jl. Sci. VI, 1823, p. 124, pi. vi, figs. 7, la, 7fc. 2 * HIL- 



DRETH, Am. Jl. Sci., XIV, 1828, p. 281. "CHENU, Manual, 1859, II, p. 138, 



fig. 663. 

 'My a nodosa EATON, Zool. Text- Book, 1826, p. 216. 



tQUADRULA METANEVRA var. WARDII Lea. 



*Unio wardii LEA, Pr. Ac. N. Sci. Phila., V, 1861, p, 392; * Jl. Ac. N. Sci. Phila., 

 V, 1862, p. 187, pi. xxiv, fig. 257; *Obs., IX, 1863, p. 9, pi. xxiv, fig. 257. 

 *SOWEKBY, Conch. Icon., XVI, 1868, pi. LXXXII, fig. 434. *B. H. WRIGHT, 

 Check List, 1888. * P.KTEL, Conch. Sam., Ill, 1890, p. 172. 



* Margaron (Unio) ivardii LEA, Syn., 1870, p. 33. 



Mississippi drainage area except its southern "portion, extending to 

 the Tennessee and Arkansas rivers. 



tQUADRULA TUBEROSA Lea. 



* Unio <u&er08ttLEA, Pr. Am. Phil. Soc., 1, 1840, p. 286; * Tr. Am. Phil. Soc., VIII, 



1842, p. 210, pi. xiv, fig. 25; *Obs., Ill, 1842, p. 48, pi. xiv, tig. 25. * CONRAD, 

 Pr. Ac. N. Sci. Phila., VI, 1853, p. 258. *H. and A. ADAMS, Gen. Rec. Moll., 

 II, 1857, p. 497. * CHENU, 111. Conch.. 1858, pi. xxvni, figs. 7, la, lb. *B.H. 

 WRIGHT, Check List, 1888. *P^ETEL, Conch. Sam., Ill, 1890, p. 170. 



* Margaron Unio tuberosus LEA, Syn., 1852. p. 22; 1870, p. 33. 



Cumberland and Tennessee river systems. 



'By common consent this species which is a most striking one has been allowed 

 to stand to the credit of Ratiuesque. The outlines of the figures bear some resem- 

 blance to the species. 



2 It is hard to tell from these figures just what Barnes had before him when he 

 described this species. They are as much like metanevra as anything. 



