NO. 1205. SYNOPSIS OF THE NAIADES SIMPSON. 613 



1834, p. 214, pi. xv, fig. 45. * FERUSSAC, Guer. Mag., 1835, p. 29. *HANLEY, 

 Test. Moll., 1842, p. 184; * Biv. Shells, 1843, p. 184, pl.-xxi, fig. 54. *CATLOW 

 and REEVE, Conch. Nom., 1845, p. 56. *H. and A. ADAMS, Gen. Rec. Moll., II, 

 1857, p. 495. * SOWERBY, Conch. Icon., XVI, 1867, pi. LV, fig. 283. *B. H. 

 WRIGHT, Check List, 1888. PJKTKL, Conch. Sam., Ill, 1890, p. 147. 



* Margarita ( Unio) camelus LEA, Syn., 1836, p. 19 ; 1838, p. 17. 



* Margaron ( Unio) camelus LEA, Syn., 1852, p. 24 ; 1870, p. 37. 

 *Uniocompres8i8simusLKA, l PT. Am. Phil. Soc., IV, 1845, p. 163; * Tr. Am. Phil. Soc., 



X, 1848, p. 81, pi. vni, fig. 23 ; * Obs., IV,1848, p. 55, pi. vin, fig. 23.* CONRAD, 

 Pr. Ac. N. Sci. Phila.,VI, 1853, p. 247.* H. and A. ADAMS, Gen. Rec. Moll., II, 

 1857, p. 495.* B. H. WRIGHT, Check List, 1888.* PJETEL, Conch Sam., Ill, 

 1890, p. 148. 



* Margaron ( Unio) compressissimus LEA, Syn., 1852, p. 24 ; 1870, p. 37. 



Ohio, Tennessee, and Cumberland river systems; peninsula of Michi- 

 gan; Kansas; Arkansas; Indian Territory; Louisiana. It is quite 

 probable that some of the specimens reported from the southwestern 

 part of the range belong to the next species. 



tPTYCHOBRANCHUS CLINTONENSIS Simpson. 



* Ptycholranchus clintonensis SIMPSON, Pr. Ac. N. Sci. Phila., 1900, p. 79, pi. v, fig. 3. 



Little Red River, Arkansas; Indian Territory (!); southwest Ten- 



nessee( ?) 



tPTYCHOBRANCHUS FOREMANIANUS Lea. 



* Unio foremanianus LEA, Pr. Am. Phil. Soc., II, 1842, p. 224; *Tr. Am. Phil. Soc., 



VIII, 1842, p. 247, pi. xxvn, fig. 64 ; * Obs., Ill, 1842, p. 85, pi. xxvn, fig. 64. 



* CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 249.* H. and A. ADAMS, Gen. Rec. 

 Moll., II, 1857, p. 495.* CHENU, 111. Conch., 1858, pi. xxvi, figs. 1, la, 16. 



* SOWERBY, Conch. Icon., XVI, 1866, pi. xxxvn, fig. 202. *B. H. WRIGHT, 

 Check List, 1888. * P.ETEL, Conch. Sam., Ill, 1890, p. 153. 



* Margaron ( Unio) foremanianus LEA, Syn., 1852, p. 23; 1870, p. 36. 



* Unio woodwardius LEA, 2 Pr. Ac. N. Sci. Phila., IX, 1857, p. 170. 



* Unio icoodu'ardianus LEA, Jl. Ac. N. Sci. Phila., IV, 1859, p. 199, pi. xxni, fig. 82; 



'Obs., 1859, p. 17, pi. xxm, fig. 82.* ? REEVE, Conch. Icon., XVI, 1864, pi. 



xvi, fig. 73. *B. H. WRIGHT, Check List, 1888. *P/ETEL, Conch. Sam., Ill, 



1890, p. 172. 



Margaron ( Unio) woodwardianus LEA, Syn., 1870, p. 36. :! 

 *Unio velatus CONRAD, Jl. Ac. N. Sci. Phila., 1853, p. 298, pi. xxvn, fig. 6; "Pr. 



Ac. N. Sci. Phila., VI, 1853 p. 259. 



Alabama River drainage. 



1 The type is simply an old, stunted phaseolus, with nearly every vestige of epider- 

 mis eroded away. 



2 This is the name originally given by Dr. Lea. He afterward changed it to 

 woodwardianus. 



3 1 formerly thought foremanianus and woodwardianus distinct, but a large amount of 

 material received from Mr. R. E. Call, from the Cahawba River, Alabama, shows 

 that the two absolutely blend together, there being a great diversity of form, and 

 some specimens show the capillary rays of foremanianus and the square spots of 

 woodwardianus, while others are of a uniform tawny color. 



