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, pi. xxi, fig. 54.— *Catlow 

 andEEEVE, 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.— P.etel, Conch. Sam., Ill, 1890, p. 147. 



* Margarita ( Vnio) camelus Lea, Syn., 1836, p. 19; 1838, p. 17. 



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



* Unio compressissimus Lea,i Pr. Am. Phil. Soc, IV, 1845, p. 163 ; * Tr. Am. Phil. Soc, 



X, 1848, p. 81, pi. VIII, fig. 23 ; * Obs., IV,1848, p. 55, pi. viii, fig. 23.—* Conrad, 

 Pr. Ac. N. Sci. Phila.,VI, 1853, p. 247.—* H. and A. Adams, Geu. Rec. Moll., II, 

 1857, p. 495.—* B. H. Wright, Check List, 1888.—* P^etel, 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 tbe next species. 



fPTYCHOBRANCHUS CLINTONENSIS Simpson. 

 " Ptychobranchus clintonensis Simpson, Pr. Ac. N. Sci. Phila., 1900, p. 79, pi. v, fig. 3. 



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



nessee(?) 



fPTYCHOBRANCHUS FOREMANIANUS Lea. 



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



VIII, 1842, p. 247, pi. XXVII, fig. 64 ; * Obs., Ill, 1842, p. 85, pi. xxvii, 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.— 

 *SowEEBY, Conch. Icon., XVI, 1866, pi. xxxvii, fig. 202.— *B. H. Wright, 

 Check List, 1888.— *P^tel, Conch. Sam., Ill, 1890, p. 153. 



* Margaron {Unio) foremanianus Lea, Syn., 1852, p. 23; 1870, p. 36. 



* Unio woodwardius Lea,^ Pr. Ac. N. Sci. Phila., IX, 1857, p. 170. 



* Unio tcoodwardianus Lea, Jl. Ac. N. Sci. Phila., IV, 1859, p. 199, pi. xxiii, fig. 82; 



'Obs., 1859, p. 17, pi. XXIII, fig. 82.— *? Reeve, Conch. Icon., XVI, 1864, pi. 



XVI, fig.73.— *B. H. Wright, Check List, 1888.— *PiETEL, Conch. Sam., Ill, 



1890, p. 172. 

 Margaron ( Unio) ivoodwardiamis Lea, Syn., 1870, p. 36.' 

 *Unio velatus Conrad, Jl. Ac. N. Sci. Phila., 1853, p. 298, pi. xxvii, 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 

 tvoodivardianus. 



^1 formerly thought /oremaniffl«»s and woo(?rt)ar^iamMS 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 oi foremanianus and the square spots of 

 woodwardianus, while others are of a uniform tawny color. 



