﻿346 STROPHITUS 



stroni]^, sonicwliat curved in l)cfore the beaks and curved out 

 behind them, havinj;- in each valve a sort of vestigial tooth 

 ])laced in front of the l^eaks, that of the left valve usually most 

 jjroduced ; laterals wanting or nearly so ; beak cavities shallow ; 

 muscle scars large, slightly impressed ; nacre white, bluish ot 

 salmon. 



Length 115, height 65, diam. 38 mm. 



Length 115. height 53, diam. 41 mm. 



Length 90, height 50, diam. 30 mm. 



Entire Mississip])i drainag'e ; St. Lawrence system and south 

 in streams draining into the Atlantic to North Carolina; north 

 in the British possessions to Lake Winnipeg ; southwest to cen- 

 tral Texas ; Tyner, Alabama. 



Type locality, Wabash River. 

 Alasmodonta edentnla Say, N. Harm. Diss., II, No. 22, 1829, 



p. 340. 

 Anodonta edentnla Fi;i!Russac, Guer. Mag., 1835, p. 25. — 



Ci.ESSiN, Conch. Cab. Ano., 1873. p. 107, pi. xxx, figs. 5, 6. 

 Margarita (Anodonta) edentida Lka. Syn., 1836, p. 50; 1838, 



p. 30. 

 Anodon edentula Catlow and Reeve, Conch. Nom., 1845. P- 



66.— De Kay, Zool. N. Y., Pt. 5, 1848, p. 201, pi. xvi, fig. 



231. — Hartman and Michenek, Conch. Cest., 1874, p. 95, 



fig. 174. 

 Uniopsis edentula Agassiz, Arch, fiir Nat., I, 1852, p. 49. 

 Margaron (Anodonta) edentula Lea, Syn., 1852, p. 49; 1870, 



P- 79- 

 Strophitus edeiititliis Conrad, Pr. Ac. N. Sci. Phila., VI, 1853, 



p. 263. — Baker, Moll. Chicago, Pt. T, i8()8, p. 67, pi. xii, 



figs. 5, 6; XVII, fig. 3. — Simpson, Syn., 1900, p. 616. 

 Anodon rugosus Swainson, Zool. 111., 1st sen, II, pi. xcvi, 



1822. 

 Anodonta rugosus Hanley, Biv. Shells, 1843, P- 217. 

 Strophitus rugosus Dat.t,, .Maska, XIII. 1905, p. 127. 

 Anodonta undidata Hiedreth, Am. Jl. Sci., XIV, 1828. p. 290 



— Clessin, Conch. Cab. Ano.. 1873. p. 7(), pi. xxvii. figs. 



3. 5- 



