826 QUADRULA 
Unio heros Say, New Harm. Diss., II, No. 19, 1829, p. 291.— 
Conrap, Monog., XII, 1840, p. 107, pl. L1x.—HANLEy, Biv. 
shells, 18435 p.175: pl. xxi figs 28: 
Quadrula heros SIMPSON, Syn., 1900, p. 770. 
Crenodonta heros ORtMannN, Ann. Car. Mus., VIII, 1912, p. 
248. 
Unio heros var. multiplicatus Pavren, Conch. Sam., II], 1890, 
p. 155. | 
Unio undulatus Say, Am. Conch., I, 1831, pl. xvi (April). 
Unio multiplicatus Lua, Tr. Am. Phil. Soc., TV, 1831, p. 70, 
pl. iv, fig. 2 (latter part of the year) ; Obs. I, 1834, p. 80, pl. 
Iv, fig. 2—Potirz and Micuaup, Gall. Moll., 1844, p. 155, 
pl. Lx, fig. 1—CnHeENu, Ill. Conch., 1858, pl. rx, figs. 2, 2a, 
2b;.Manual, 1859; 11; pri435 fic. 7032. 
Margarita (Unio) multiplicatus Lea, Syn., 1836, p. 12; 1838, 
po ae 
Margaron (Unico) multiplicatus Lea, Syn., 1852, p. 20; 1870, 
p: 20. 
Unio. eighisa, Lea, Pr. Ace N.-oet-Phila, lV 1860, +p 4065 
Ji Ae: N. Sct: Phila SsIV3 1860)p. 367. ple xiv.ties eer 
Obs., VEIT, 1860;: p40; plo ixiv, fige 192: 
Margaron (Umno) eightsu La, Syn., 1870, p. 20. 
Unio eighti Pztet, Conch. Sam., III, 1890, p. 151. 
Unio atrocostatus Reeve, Conch. Icon., XVI, 1864, pl. tv, fig. 
13. (Changed in Errata to Unio heros.) 
his is one of the largest known North American Uniones. 
Specimens have been reported exceeding the largest dimen- 
sions given above, which are those of a specimen taken from 
the Little Miami River, near Cincinnati, Ohio, and is in the 
I.ea collection. J,ea’s shell is 8 inches long and weighs 2 lbs. 
9:5 oz, Dro WAS: Strode‘in-the: Nautilus, Vol “Exp. 10 re- 
ports a specimen of this species from the Spoon River, Illinois, 
8.5 inches in length, Symphynota complanata the same length 
~and “Lampsilis alata 9 inches long. I can see no reason for 
separating Unio eightsii from heros even varietally. The spe- 
cies apparently extends through Mississippi, Louisiana and 
Texas well into Mexico. 
