566 riu>cEi-:i>iM,s or ////: \ATH>XAL 



"Margaron ( Unto) cromwellii LEA, Syn., 1870, p. 49. 



' I'nio man/ in is LEA, Pr. Ac. N. Sci. Phila.. 18&5, p. 89; *.J1. Ac. X. Sci. Phila., VI, 



1869, p. 225, pi. xxxi, fig. 69; * < M.S., XII, 1X69, p. in. pi. xxxi. fig. 69.' B. H. 



WRIGHT, Check List, 1888. 

 *Margaron ( Unio) margin!* LKA. Syn., 1870, p. 49. 



Western Georgia and southeastern Alabama. 



t LAMPSILIS CORVUNCULUS Lea. 



*Unio corvunculiis LEA, Pr. Ac. N. Sci. Phila., XII, 1868, p. 144; * Jl. Ac. X. Sci. 



Phila., VI, 1869, p. 314, pi. L, tig. 127; * Obs., XII, 1869, p. 74, pi. i., fig. 127. - H. 



H. WRIOHT, Check List. 1888. 

 *Margaron ( I'nio) corrunculus LEA, Syn., 1870, p. 49. 



Western Georgia; Village Creek, Jefferson County, Alabama; Lake 

 Ashby, Florida. 



t LAMPSILIS PAULUS Lea. 



*Unio paulus LEA, Pr. Am. Phil. Soc., 1840, p. 287; * Tr. Am. Phil. Soc., VIII, 

 1842, p. 213, pi. xv, fig. 29; * Obs., Ill, 1842, p. 51, pi. xv, fig. 29." CONRAD, 

 Pr. Ac. N. Sci. Phila., VI, 1853, p. 254.* H. and A. ADAMS, Gen. Rec. Moll., II, 

 1857, p. 494.* CHEVU, 111. Conch., 1858, pi. xxvn, figs. 5, 5o, 5ft. *KUSTER, 

 Conch. Cab. Unio, 1861, p. 260, pi. LXXXVII, fig. 6.* B. H. WRIGHT, Check 

 List, 1888. * P.KTEL, Conch. Sam., Ill, 1890, p. 162. 



*Margaron ( Unio) paulus LEA, Syn., 1852, p. 31; 1870, p. 49. 



<t*Unio con-inn* LEA, Pr. Ac. N. Sci. Phila., XII, 1868, p. 144; *J1. Ac. N. Sci. 

 Phila., VI, 1869, p. 310, pi. XLVIII, fig. 123; * Obs., XII, 1869, p. 70, pi. XLVIII, 

 fig. 123.* B. H.WRIGHT, Check List, 1888. 



*Margaron ( Unio) corvinus LBA, Syn., 1870, p. 49. 



Flint and Chattahoocb.ee rivers, Georgia. 



LAMPSILIS PULLUS Conrad. 1 



* Unio pullns CONRAD, Monog., XI, 1838, p. 100, pi. LIV, fig. 2; * Proc. Acad. Nat. 

 Sci. Phila., VI, 1853, p. 255." H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 

 494. * KusTER,Conch. Cab. Unio, 1862, p. 270, pi. xci, fig. 2.* B. H.WRIGHT, 

 Check List, 1888.* P,ETEL, Conch. Sam., Ill, 1890, p. 164. 



*Margaron ( Unio) pullns LEA, Syn., 1852, p. 31; 1870, p. 49. 



Warm Springs, North Carolina. 



Subgenus PROPTERA Rafinesque, 1819. 

 (Type, I'nio alatus Say.) 



Shell usually large, gaping at the anterior base and edge of dorsal 

 slope, winged along the dorsal region when young and often when adult; 

 beak sculpture feeble, consisting, when developed, of an anterior and 

 posterior loop, the former often wanting; the latter sometimes becomes 

 slightly nodulous; epidermis generally brown, often cloth like when 

 fresh, ray less or feebly rayed ; teeth rather compressed, pseudocardinals 



1 Conrad's figure is a poor one, and I can not be positive just where the species 

 should be placed, bnt incline to think it a member of the Texasensin group. Lea has 

 a shell which he calls the pnllus of Conrad, which came from Ravenel, labeled "S. 

 Carolina," but which, I think, is not this, but some species of the subrostratus group. 

 It is quite probable that, pullus is the same as Lea's corvunculus. 



