QUADRULA 851 
Unio bullatus var. schoolcraftensis Payret, Conch. Sam., III, 
1890, p. 146. 
Margaron (Unio) schoolcraftu Liza, Syn., 1870, p. 33. 
Unio schoolcraftu, B. H. Wricut, Check List, 1888. 
Varies absolutely into the type, but possibly worthy of 
varietal rank. ‘Che type was a young shell and is not in the 
Tea collection. 
Var. perncdosa (Lea). 
Suborbicular, moderately inflated, pustulous ; epidermis yel- 
lowish-brown. 
Length 50, height 50, diam. 33 mm. 
Tennessee and Alabama River systems. 
Type locality, North Carolina. 
Unio pernodosus Lea, Pr. Am. Phil. Soc., [V, 1845, p. 163; 
daeAmaw ehal: ‘Sock, Xi 1848, pi 71, pl 11; fies 8 ;-Obs;5 LV, 
1848, p. 45, pl. 1, fig. 8.—Rrrve, Conch. Icon., XVI, 1864, 
ply sree his: 4G: 
Margaron (Unio) pernodosus Lea, Syn., 1870, p. 34. 
Ouadrula pustulosa var. pernodos@ SIMPSON, Syn., 1900, p. 
780. 
Unio asperatus Lea, Pr. Ac. N. Sci. Phila., V, 1861, p. 41; Jl. 
AGN voc enila. Vii i862, ps 6s, pl. vir, fig. 218 Obs; 
VIII, 1862, p. 72, pl. vir, fig. 218.—Sowerpy, Conch. Icon., 
XVI, 1868, pl. Lxxxv, fig. 450. 
Margaron (Unio) asperatus Lea, Syn., 1870, p. 33. 
Distinguished from the type by being nearly orbicular in 
outline. Specimens connecting it with the type are abundant 
in the Chio and adjacent rivers. 
Var. kieneriana (Lea). 
Shell suborbicular, smooth or somewhat nodulous; epider- 
mis ashy-brown or greenish-brown. 
Length 39, height 39, diam. 22 mm. 
Alabama river system. 
Type locality, Coosawattee river, Murray Co., Ga. 
