NO. 1205. 



SYNOPSIS OF THE NAIADES SIMPSON. 747 



LEY, Test. Moll., 1842, p. 213. *CONRAD, Pr. Ac. N. Sci., Phila., VI, 1853, p. 

 250. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 495. *CHENU, 111. 

 Conch., 1858, pi. xxxn, figs. 1, la, !&. *KUSTER, Conch. Cab. Unio, 1862, 

 p. 287, pi. xcvi, fig. 4. *B. H. WRIGHT, Check List, 1888. 

 *Margaron (Unio) liohionensis LKA, Syn., 1852, p. 25; 1870, p. 38. 



* Unio mundus LKA, Pr. Ac. N. Sci. Phila., 1, 1857, p. 83; Ml. Ac. N. Sci. Phila., VI, 



1866, p. 40. pi. xiv, fig. 38; *0bs., XI, 1867, p. 44, pi. xiv, fig. 38. *REEVE, 



Conch. Icon., XVI, 1864, pi. xvi, fig. 72.' *B. H. WRIGHT, Check List, 



1888. *P;ETEL, Conch. Sam., Ill, 1890, p. 160. 

 *Margaron (Unio) mundus LEA, Syn.. 1870, p. 40. 

 \*Unio lawi LEA, Pr. Ac. N. Sci. Phila., I, 1871. p. 189; Ml. Ac. N. Sci. Phila., 



VIII, 1874, p. 8, pi. n, fig. 4; *0bs., XIII, 1874, p. 12, pi. n, fig. 4. *B. H. 



WRIGHT, Check List, 1888. 

 \*Unio ixittinoidex LEA, Pr. Ac. N. Sci. Phila., I, 1871, p. 193; *J1. Ac. N. Sci. 



Phila,, VIII, 1874, p. 16, pi. iv, fig. 12; "Obs., XIII, 1874, p. 20, pi. iv, fig. 12. 



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

 t * Unio Mlulus LEA, Pr. Ac. N. Sci. Phila., II, 1872, p. 161 ; Ml. Ac. N. Sci. Phila., 



VIII, 1874, p. 50, pi. xvn, fig. 48; *Obs., XIII, 1874, p. 54, pi. xvn, fig. 



48. B. H. WRIGHT, Check List, 1888. 



Tennessee River system. 



t PLEUROBEMA BOURNIANUS Lea. 



* Unio boiirnianus LEA, Pr. Am. Phil. Soc., I, 1840, p. 288 ; * Tr. Am. Phil. Soc., VIII, 



1842, p. 213, pi. xv, fig. 28; *Obs., Ill, p. 51, pi. xv, fig. 28. *CONRAD, Pr. 

 Ac. N. Sci. Phila., VI, 1853, p. 245. *H. and A. ADAMS, Gen. Rec. Moll., II, 

 1857, p. 495. *CHENU, 111. Conch., 1858, pi. xxvin, figs. 2, 2a, 2b. *B. H. 

 WRIGHT, Check List, 1888. *P.ETEL, Conch. Sam., Ill, 1890, p. 146. 



* Maragron (Unio) bonrnianus LEA, Syn., 1852, p. 25; 1870, p. 39. 



Sciota River, near Chillicothe, Ohio. 



t PLEUROBEMA EDGARIANUS Lea. 



*Unlo c(l</arianu8 LEA, Pr. Am. Phil. Soc., I, 1840, p. 288; *Tr. Am. Phil. Soc., 

 VIII, 1842, p. 214, pi. xv, fig. 30; Obs., Ill, 1842, p. 52, pi. xv, fig. 30.* Cox- 

 UAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 248.* H. and A. ADAMS, Gen. Rec. 

 Moll., II, 1857, p. 495. * CHENU, 111. Conch., 1858, pi. xxix, figs. 5, 5a, 5b.~ 

 * KCSTER, Conch. Cab., 1861, p. 213, pi. LXX, fig. 5. * MUSGRAVE, Phot. 

 Conch., 1863, pi. n, fig. 6.* REEVE, Couch. Icon., XVI, 1864, pi. xv, fig. 

 65.* B. H. WRIGHT, Check List, 1888. * P.ETEL, Conch. Sam., Ill, 1890, p. 

 151. 



* Maryaron ( Unio) edyarianus LEA, Syn., 1852, p. 25; 1870, p. 39. 



t *Unio obuncus LEA, Pr. Ac. N. Sci., I, 1871, p. 192; * Jl. Ac. N. Sci., VIII, 1874, 



p. 9, pi. n, fig. 5; *Obs., XIII, 1874, p. 13, pi. n, fig. 5. * B. H. WRIGHT. 



Check List, 1888. 

 t *Unio andersonensis LEA, Pr. Ac. N. Sci. Phila., II, 1872, p. 155; * Jl. Ac.,N. Sci. 



Phila., VIII, 1874, p. 36, pi. xn, fig. 33; *Obs., XILT, 1874, p. 40, pi. xn, lig. 



33._*B. H. WRIGHT, Check List, 1888. 



Tennessee River system. 



'In the errata Reeve says this is not mundus, but that it is nearer cuneolns and 

 mooresianus. I have compan-d it with authentic specimens, and it is certainly 

 nearer mundus than either of the other mentioned species. 



