NO. 1205. SYNOPSIS OF THE NAIADES SIMP SOX. 663 



Margarita ( Unio) compressus LEA, Syn., 1836, p. 11; 1838, p. 13. 



* CompJanaria compressiut AGASSI/, Arch. fiir. Nat., I, 1852, p. 48. 



* Complaiiariaalasmodontina STIMPSOX, Shells of N. Eng., 1851, p. 14. 



* Unio alasmodontinas P.KTEL, Couch. Sara., Ill, 1890, p. 144. 



* Margin-on (Cnio) pressits LEA, Syn., 1852, p. 19; 1870, p. 29.' 



* Unio pressus H. ami A. ADAMS, Gen. Rec. Moll., II, 1857, p. 498. * LATCIIFORD, 



Tr. Ottawa F. N. Club., 1882, p. 52. *B. H. WRIGHT, Check List, 1888. 

 PJSTEI., Couch. Sain., Ill, 1890, p. 164. 



* Alasmodonla pressa BAKER, Tr. Ac. N. Sci. St. L., VIII, 1898, p. 76, fig. ; Moll. 



Chicago, Pt. 1, 1898, p. 58, pi. vi, fig. 3 ; x, fig. 4. 



SYMPHYNOTA COMPRESSA var. PLEBIUS C. B. Adams 



* Unio compressus var. plebius C. B. ADAMS, F. W. and L. Shells of Vt., p. 16. 



Ohio and St. Lawrence drainage areas; west to Arkansas, north 

 through Nebraska to Wisconsin ; Hudson River. 



t SYMPHYNOTA CHARLOTTENSIS Lea. 



* Unio charlottensis LEA, Pr. Ac. X. Sci. Phila., VII, 1863, p. 191; *J1. Ac.'X. Sci. 



Phila., VI, 1866, p. 8, pi. n, fig. 5; *Obs., XI, 1867, p. 12, pi. n, tig. 5. *B. 

 H. WRIGHT, Check List, 1888. 

 " MaryaroH ( Unio) charJoltensis LKA, Syn., 1870, p. 51. 



Near Charlotte, Xorth Carolina. 



t SYMPHYNOTA VIRIDIS Conrad. 



I nio riridia CONRAD, Monog., IV, 1836, p. 35, pi. xvn, fig. 1 ; 2 * Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 259. *SOWERBY, Conch. Icon., XVI, 1866, pi. XLV, fig. 

 244. "B. H. WRIGHT, Check List, 1888. 



* Margarita (Unio) tappunianus LEA, Syn., 1836, p. 39; 1838, p. 25. 



* Unio tappanianns LEA. Tr. Am. Phil. Soc., VI, 1838, p. 62, pi. xvn, fig. 55; *Obs. 



11,1838, p. 62, pi. xvn, tig. 55. *TROSCHEL, Arch, fiir Nat., V, 1839, Pt. 2, p. 

 236.* HANLEY, Test. Moll., 1842, p. 209; Biv. Shells, 1843, p. 209, pi. xxi, tig. 

 38. *DnKAY, Zool.of N. Y., Pt.5, 1843, p. 194, pi. xx, fig.242. *H. and A. 

 ADAMS, Gen. Rec. Moll. ,11, 1857, p. 492. *CHEXU, 111. Conch., 1858, pi. xx, 

 tigs. 2, 2, 2b. *KCSTER, Conch. Cab. Uuio, 1862, p. 270, pi. xci, fig. 3. 

 *HAHTMAX and MICIIEXER, Conch. Test., 1874, p. 89, fig. 185. *B. H. WRIGHT, 

 Check List, 1888. * P.ETEL, Conch. Sam., Ill, 1890, p. 169. 



*M<trijart>n ( Unio) tappaniunxa LEA, Syn., 1852, p. 39; 1870, p. 62. 



*Unio Ifippiainis CATLOW and REEVE, Conch. Nora., 1845, p. 64. 



* Wnio in/alinns LEA, Pr. Am. Phil. Soc., IV, 1845, p. 164; *Tr. Am. Phil. Soc., X, 



1848, p. 69, pi. n, fig. 4 ; Obs., IV, 1848, p. 43, pi. n, fig. 4.* CONRAD, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 250. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, 

 p. -192. * KUSTER, Conch. Cab. Unio, 1861, p. 204, pi. LXVIII, fig. 3.* P/ETEL, 

 Conch. Sam., Ill, 1890, p. 155. 

 "Marganm (Unio) hyalinus LKA, Syn., 1852, p. 39; 1870, p. 62. 



1 Lea changed his name compressa to pressus because the former had been used for 

 a Unio previously by Sowerby. The restoration of the genus Symphijnota makes the 

 earlier name of Lea valid. 



2 Credited by Conrad and others to Rafinesque. The description of the latter of 

 Unio viridis is not sufficiently clear to distinguish it from some of the other members 

 of this genus, and the locality given is in error for the shell figured by Conrad, 

 which belongs exclusively to the Atlantic drainage, and not to the Ohio River and 

 Kentucky, localities given by Ratiuesque. 



