780 I'L'OCEEDINGS OF Till: X.I TIOX.IL MUSEUM. 



1888.* CALL (part), Tr. Ac. N. Sci. St. Louis, VII, 1895, p. 40, pis. XH, xin, 

 xiv, xv, figs. 1, 2. 



* Margarita ( I'nio) dorfeuillianus LEA, Syn., 1838, p. 15. 

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

 *f Unio uber CONRAD, Am. Jl. Conch., II, 1866, p. 279, pi. xv, iig. 16.' 



t*[7nio schoolcraftcnsis LEA, Tr. Am. Phil. Soc., V,1834, p. 37, pi. in, fig.9; 2 *Obs., 

 I, 1834, p. 149, pi. in, fig. 9. *FERUSSAC, Guer. Mag., 1835, p. 29. "HANLEY, 

 Test. Moll., 1842, p. 178; *Biv. Shells, 1843, p. 178. "CATLOW and RKKVK, 

 Conch. Nom., 1845, p. 63. "H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 497. 

 *SOWERBY, Conch. Icon., XVI, 1868, pi. I, fig. 3; xin, fig. 47. 



* Mar 'jarita (Unio) schoolcraftensia LEA, Syn., 1836, p. 15; 1838, p. 15. 

 * Marr/aron (Unio) schoolcraftenais LEA, Syn., 1852, p. 22. 



*Unio bullalus var. suhoolcraftemi* P.ETKL, Conch. Sam., Ill, 1890, p. 146. 



Wdryaron ( I'nio) svhoolcraftii LEA, Syn., 1870, p. 33. 

 *fnio schoolttraflil, B. II. WRIGHT, Check List, 1888. 



tQUADRULA PUSTULOSA var. PERNODOSA Lea. 



*Unio pernodosus LEA, Pr. Am. Phil. Soc., IV, 1845, p. 163; *Tr. Am. Phil. Soc., 

 X, 1848, p. 71, pi. in, fig. 8; *Obs., IV, 1848, p. 45, pi. in, fig. 8.* CONRAD, 

 Pr. Ac.N. Sci. Phila., VI, 1853, p. 254.* REEVE, Couch. Icon., XVI, 1864, pi. 

 xn, fig. 46. *B. H. WRIGHT, Check List, 1888. *P.ETEL, Conch. Sam., Ill, 

 1890, p. 163. 



*Margaron ( Unio) pernodosus LEA, Syn., 1870, p. 34. 



t* Unio asperatus LEA, S Pr. Ac. N. Sci. Phila., V, 1861, p. 41 ; * Jl. Ac. N. Sci. Phila., 

 V, 1862, p. 68, pi. vii, fig. 218; *Obs., VIII, 1862, p. 72, pi. vn, fig. 218. 

 *SOWERBY, Conch. Icon., XVI, 1868, pi. LXXXV, fig. 450. *B. H. WRIGHT, 

 Check List, 1888. * P^ETEL, Conch. Sam., Ill, 1890, p. 145. 



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



tQUADRULA PUSTULOSA var. KEINERIANA Lea. 



*Unio keineriami8 LEA, Pr. Am. Phil. Soc., V, 1852, p. 251; *Tr. Am. Phil. Soc., 

 X, 1852, p. 281, pi. xxm, fig. 40; *Obs., V, 1852, p. 37, pi. xxm, fig. 40. 

 * CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 251. *H. and A. ADAMS, Gen. 

 Rec. Moll., II, 1857, p. 496. *B. H. WRIGHT, Check List, 1888. * P.ETEL, 

 Conch. Sam., Ill, 1890, p. 156. 



*Margaron ( Unio (keinerianus LEA, Syn., 1852, p. 22; 1870, p. 34. 



Entire Mississippi drainage; Michigan; Lake Erie;? Alabama Kiver 

 system; westward to central Texas; the varieties in streams draining 

 into the Gulf of Mexico. 



1 Probably a smooth form of pmtulosus. 



2 The type is a nearly smooth, compressed form of pusfulosus, I am sure. Lea 

 includes with it in his collection a number of strongly pustulous, compressed shells. 

 (Jiuidrula pustitlosa is a very widespread, abundant, and variable species. A large, 

 solid, inflated, and somewhat quadrate form has been called Unio dorfeuiUianus by 

 Dr. Lea, and various smooth races have received names, but they so completely 

 blend into the typical form that it does not seem to me they are worthy of varietal 

 names. A somewhat triangular variety, often having a broad, faint ray, is found in 

 the Ohio River and southward which probably equals the variety pernodosa. 



3 Seems to be about the same as /'. pcrnodosus, only a little smoother. These two 

 are more rounded posteriorly, and are doubtfully worthy of a varietal name. 



