113 



IInio GiiAxs Lea. 



Trans. Am. Pliilos. Soc, Vol. iv, p. 82, PI. viii, Fig. 12, 1S80; Observa- 

 tions on the (?«i»s UiiiiK Vol. i, |.. 92, PI. viii. Fig. 12. Ohio Kiver (PI. iii, 

 Figs. 14-16). 



Unio piillun i'onv.id. Mi)nograj)hy Family Unionidir, pp. lOO, 101, Pl.lv, 

 Fig. 2, 183(). Wateree River, Soiitii Carolina (PI. v. Figs. :^.2-34). 



Unio granulatus Lea. Proc. Ac«i(l. Nat. Sei. Phila , Vol. xiii, p. 60, 1861; 

 Jour. Acad. Nat. Sci. Phila., Vol. vi, p. 48, PI. xvi, Fig. 46, 1866; Observa- 

 tions on the Geniii^ Unio, Vol. xi, p. 52, PI. xvi. Fig 46. Big Prairie Creek, 

 Alabama (PI. iv, Figs. 2:}-25). 



Unio grrmanits Lea. I'l-oc Acad. Nat. i>ci. Phila., Vol. xiii, p. 40, 1861; 

 Jour. Acad. Nat. Sci. Phila., Vol. vi, p. 4!l, PI. xix, Fig. ■J4, 1866; Observa- 

 tions on the Genus Unio, Vol. xi, ]>. 5."'>, PI. xix, Fig. 54. Coosa River, Ala- 

 bama (PI. iv, Figs. 26-28). 



Unio cromwellii Lea. Proc. Acad. Nat. Sci. Phila., Vol. xvii, p. 89, 1865; 

 Jour. Acad. Nat. Sci. Phila., Vol. vi, p. 258, PI. xxxi. Fig. 78, 1868; Obser- 

 vations on the Genux Unio, Vol. xii. p. 18, Pi. xxxi, Fig. 7.'). Kiokee Creek, 

 Albany, Georgia (PI. iv. Figs. 29-81). 



Unio cylindrelluit Lea. Jour. Acad. Nat. Sci. Phila., Vol. vi, p. 308, PI. 

 xlviii. Fig. 121, 1868; Observations on the Genu>i Unio, Vol. xii, p. 68, PI. 

 xlviii, Fig. 121. East Tennessee, North Georgia. North Alabama (PI. iii, 

 Figs. 17-19). 



Unio corvwnciilun Lea. Jour. Acad. Nat. Sci. Phila., V^ol. vi, p. 314, PI. 1, 

 Fig. 127, 1868; Observations on the Getiu^ Unio, Vol. xii, p. 74, Pi. 1, Fig. 127. 

 Swamp Creek, Whitheld County, Georgia (PI. iii. Figs. 20-22). 



The following conchologic description is based upon material taken in the 

 White River, Indiana, where the species attains its maximum ilevelopment, both 

 in point of size and abundance. 



S/te// small, elli[)tica!, striate, r;itlier' thick and subangulatc posteriorly, much 

 thicker anteriorly and niundcd ; umbonea elevated, coarsely undulate, with irreg- 

 ularly crescent-shaped folds, three or four in number; epidermis rather thick, 

 dark greenish, obscurely radiate over the anterior portion of the disk, a character 

 b?st seen by traiismilled light, somewhat jiolished over the umbonal slope and 

 generally glos-y, lighter colored on the umbones; posterior margin sulcate in tlie 

 female, dorsal portion produced ; i('(7a?;ie»/ small, horn-colored, thin; both cardinal 

 and posterior hinge leelli double in the left and single in tiie right valve, the car- 

 dinals short, thick, heavy, serrate ; lafn-olx rather long, striate, straight, lamellar ; 



