NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSOX. 663 



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

 *" Complaiiaria compressus Agassiz, Arch. fiir. Nat., I, 18.52, p. 48. 



* Complaiiaria aJo.smodoniina Stimpson, Shells of N. Eng., 1851, p. 14. 



* Unio alasmodontinas P.etel, Conch. Sam., Ill, 1890, p. 144. 



"^ Margaron {Unio) pressus Lea, Syn., 1852, p. 19; 1870, p. 29." 



* Unio pressus H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 498. — ^*Latchford, 



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

 ^PzETEL, Couch. Sam., Ill, 1890, p. 164. 

 ^ Alasmodonia 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 



* Uvio compressus var. plehius C. B. Adams, F. "W. and L. Shells of Vt., p. 16. 



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

 through jSTebraska to Wisconsin; Hudson Eiver. 



t SYMPHYNOTA CHARLOTTENSIS Lea. 



* Unio charlottensis Lea, Pr. Ac. N. Sci. Phila., VII, 1863, p. 191; *J1. Ac. N. Sci. 



Phila., VI, 1866, p. 8, pi. ii, fig.5; ^Obs., XI, 1867, p. 12, pi. ii, fig. 5.— *B. 

 H. Wright, Check List, 1888. 

 " Margaron ( Unio) cliarlottensis Lea, Sj'n., 1870, j). 51. 



Hear Charlotte, Korth Carolina. 



1 SYMPHYNOTA VIRIDIS Conrad. 



* Unio viridis Conrad, Monog., IV, 1836, p. 35, pi. xvii, fig. 1;- * Pi-. 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) tappanianus Lea, Syn., 1836, p. 39; 1838, p. 25. 



** Unio tappanianus Lea, Tr. Am. Phil. Soc, VI, 1838, p. 62, pi. xvii, fig. 55; *Ob.s. 

 11,1838, p. 62, pi. XVII, fig. 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,— *DeKay, Zool. of N. Y., Pt. 5, 1843, p. 194,pLxx, fig. 242.— *H. and A. 

 Adams, Gen. Eec. Moll., II, 1857, p. 492.— *Chenu, 111. Conch., 1858, pi. xx, 

 figs. 2, 2fl, 2&,— *KusTER, Conch, Cab. Unio, 1862, p. 270, pi. xci, fig. 3.— 

 ''Hartman and Michener, Conch. Test., 1874, p. 89, fig. 185. — " B. H. Wright, 

 Check List, 1888.— " P.etel, Conch. Sam., Ill, 1890, p. 169. 



^Margaron ( Unio) tappanianus Lea, Syn., 1852, p. 39 ; 1870, p. 62. 



*Unio tappianus Catlow and Eeeve, Conch. Nom., 1845, p. 64. 



* t Unio hyalinus Lea, Pr. Am. Phil. Soc, IV, 1845, p. 164 ; * Tr. Am. Phil. Soc, X, 



1848, p. 69, pi. II, fig. 4 ; Obs., IV, 1848, p. 43, pi. ii, fig. 4.—^ Conrad, Pr. Ac. 

 X.Sci.Phila., VI, 1853, p. 250.— *H. and A. Adams, Gen. Eec.Moll., II, 1857, 

 p. 492.—" KusTER, Conch. Cab. Unio, 1861, p. 204, pi. lxviii, fig. 3.—* P^tel, 

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



* Margaron (Unio) hyalinus Lea, Syn., 1852, p. 39; 1870, p. 62. 



' Lea changed his name compressa to jtressus because the former had been used for 

 a Unio previouslj^ by Sowerby. The restoration of the genus Symphynota 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 Oliio River and 

 Kentucky, localities given by Rafinesque. 



