NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 731 



tUNIO SAGITTIFORMISLea.' 



* U'niosagUtiformisl,JZA,Tr. Am. Phil. Soc. X, 1852, p. 277, pi. xxii, fig. 35 ; * Obs.,V, 



1852, p. 33, pi. XXII, fig. 35.—*' Conrad, Pr. Ac. N. Sci. Pbi]a.,VI, 1853, p. 257.— 



* H. aud A. Adams, Gen. Rec. Moll., II, 1857, p. 491.—* Sowkrby, Conch. Icon., 

 XVI, 1868, pi. xcii, fig. 499.— ' B. H. Wright, Check List, 1888.— '' PyETel, 

 Conch. Sam., Ill, 1890, p. 166. 



* Margaron ( Unio) sagittiformis Lea, Syn., 1852, p. 37 ; 1870, p. 60. 



Oconee River, Georgia; Abbeville, South Carolina. 



tUNIO ANGUSTATUS Lea. 



* Unio angustatus Lea, Tr. Am. Phil. Soc, IV, 1831, p. 114, pi. xvii, fig. 43 ; * Obs., I, 



1834,p. 124,pl. xviijfig. 43.—* Coxrad, New F. W. Shells, 1834, p. 67.— ^Ferus- 

 SAC, Guer. Mag., 1835, p. 26.—* Conrad, Monog., XI, 1838, p. 98^ pi. liv, fig. 

 2.—* Hanley, Test. Moll., 1842, p. 204 ; * Biv. Shells, 1843, p. 204, pi. xxii, fig. 

 25.— *CATLO\vand REEVE,Conch. Nom., 1845, p. 55. — *Coxrad, Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 245.—* H. and A. Adams, Gen. Eec. Moll., II, 1857, p. 491.— 



* Chenu, 111. Conch. 1858, pi. xiv, figs. 1, la, U. — * Kuster, Conch. Cab. Unio, 

 1861, p. 178, pi. LVi, fig. 4.—* Sowerby, Conch. Icon., XVI, 1868, pi. lxxii, fig. 

 372.— *B. H. Wright, Check List, 1888.— * P.etel, Conch. Sam., Ill, 1890, p. 

 144. 



* Margarita ( Unio) angustatus Lea, Syn., 1836, p. 35 ; 1838, p. 23. 



* Margaron ( Unio) angustatus Lea, Syn., 1852, p. 36; 1870, p. 57. 



* t Unio extensus Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p. 31 ; * Jl. Ac. N. Sci. Phila., 



IV, 1858, p. 68, pi. XII, fig. 49; *Obs., VI, 1868, p. 67, pi. xii, fig. 49.— * B. H. 

 Wright, Check List, 1888. 



* Margaron extensus Lea, Syn., 1870, p. 60. 



" t Unio suhcijlindraceus Lea, Pr. Ac. N. Sci. Phila., Ill, 1873, p. 422; * Jl. Ac. N. Sci. 

 Phila,, VIII, 1874, p. 58, pi. xx, fig. 57; *Obs., XIII, 1874, p. 62, pi. xx, fig. 

 SY.— vCatlow and Reeve, Conch. Nom., 1845, p. 64. — * B. H. Wright, Check 

 List, 1888. 



South Carolina to western Georgia. 



tUNIO PERSTRIATUS Lea. 



* Unio perstriatus hKA, Tr. Am. Phil. Soc, X, 1852, p. 255, pi. xii, fig. 3; *Obs.,V, 



1852, p. 11, pi. XII, fig. 3.—* Conrad, Pr. Ac. N. Sci. Phila., VI, 1853, p. 255.— 

 *H. and A. Adams, Gen. Rec. Moll., II, 1857, p. 491.— * Sowerby, Conch. 

 Icon., XVI, 1868, pi. xcii, fig. 500.—* B. H. Wright, Check List, 1888.— 



* P^tel, Conch. Sam., Ill, 1890, p. 163. 



'' Margaron ( Unio) perstriatus Lea, Syn., 1852, p. 36; 1870, p. 57. 



* t Unio gracilentus Lea, Pr. Ac. N. Sci. Phila., 1, 1857, p. 85; * Jl. Ac. N. Sci. Phila., 



V, 1862, p. 58, pi. Ill, fig. 205 ; * Obs., VIII, 1862, p. 62, pi. iii, fig. 205.—* B. H. 

 Wright, Check List, 1888. 



* Margaron ( Unio) gracilentus Lea, Syn., 1870, p. 60. 



"-fUnioperlatus Lea, Pr. Ac. N. Sci. Phila., VII, 1863, p. 193; * Jl. Ac. N. Sci.,VI, 

 1866, p. 15, pi. IV, fig. 13 ; * Obs., XI, 1867, p. 19, pi. iv, fig. 12.—* B. H.Wright, 

 Check List, 1888. 



* Margaron (Unio) ijerlatus Lea, Syn., 1870, p. 60. 



North and South Carolina. 



A very singular shell, much cut away at the anterior base, and, perhaps, abnormal. 



