NO. 1205. SYNOPSIS OF THE y.UADKSSIMPSON. 551 



]>. 271, pi. x\, fig. 27; *Obs., V, 1852, p. 27, pi. xx, tig. 27. *CONRAI>, Pr. Ac. N. 



Sci. Phila., VI, 1853, p. 255. *H. and A. ADAMS, Gen. Re<-. Moll.. II, 1857, p. 



494. *B. H.WRIGHT, Check List, 1888. P.ETEL, Conch. Sain., Ill, 1890, p. 



164. 



"Margaron ( Unio) proximus LEA, Syn., 1852, p. 29 ; 1870, p. 45. 

 Unlo tenerus SIMPSON, Pr. U. S. Nat. Mus., XV, 1892, p. 416, pi. LVIII, figs. 5 and 8. 1 



Neuse River, North Carolina; south to north Florida; west to the 

 Ktowah Elver, Georgia; Duck River, Tennessee. 



t LAMPSILIS CONSTRICTUS Conrad. 



* Unio Iieno8ii8 var. constrictus CONRAD, Monog. X, 1838, p. 91, pi. XLIX, fig. 4. 

 *Unio constrictus CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 247. "H. and A. 



ADAMS, Gen. Rec. Moll. II, 1857, p. 493. *SOWERBY, Conch. Icon., XVI, 1868, 

 pi. LXXXVII, fig. 464. *B. H. WRIGHT, Check List, 1888. *PJCTKL, Conch. 

 Sam., Ill, 1890, p. 148. 

 *Margaron ( Unio) constrictus LEA, Syn., 1852, p. 29; 1870, p. 46. 



* I'nio genthii LEA, Pr. Ac. N. Sci. Phila., 1, 1857, p. 85; * Jl. Ac. N. ,sci. Phila., 1862. 



p. 57, pi. n, fig. 204; *Obs. VIII, 1862, p. 61, pi. n, fig. 204. *B. H. WRIGHT, 

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

 "Margaron ( Unio) genihii LEA, Syn., 1870, p. 41. 



James River, Virginia; south to South Carolina; Floyd County, 

 northwest Georgia; northern Alabama; Tennessee. 



t LAMPSILIS APICINUS Lea. 



I'nio <ii>icinii LEA, Pr. Ac. N. Sci. Phila., IX, 1857, p. 32; *J1. Ac. N. Sci. Phila., 

 IV, 1858, p. 76, pi. xiv, fig. 56; *Obs., VI, 1858, p. 76, pi. xiv, fig. 56.^-*B. H. 

 WRIGHT, Check List, 1888. 

 *Margarm( I'nio) apidnna LEA, Syn., 1870, p. 44. 



Othcalooga Creek, Gordon County, Georgia. 



t LAMPSILIS OCCIDENTALIS Conrad. 



* Unio occidentalis CONRAD, Monog., VII, 1836, p. 64, pi. xxxvi, fig. 1; *Pr. Ac. N. 



Sci. Phila., VI, 1853, p. 253. *H. and A. AJDAMS, Gen. Rec. Moll., II, 1857, p. 

 492. *B. H. WRIGHT, Check List, 1888. *PJETEL, Conch. Sam., Ill, 1890, 

 p. 161. 

 *Mar</aron ( I'nio) occidentalis LEA, Syn., 1852, p. 33; 1870, p. 53. 



Current and Little Red rivers, Arkansas. 



t LAMPSILIS NIGERRIMUS Lea. 



* Unio nigerrimus LEA, Tr. Am. Phil. Soc., X, 1852, p. 268, pi. xvm, fig. 23; *Obs.,V, 



1852, p. 24, pi. xvm, fig. 23. "CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 253. 



*H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 494. *B. H. WRIGHT, Check 



List, 1888. *P^ETEL, Conch. Sam., Ill, 1890, p. 161. 

 *Margaron ( Unio) nigerrimus LEA, Syn., 1852, p. 31; 1870, p. 49. 

 *Uniofuligo REEVE, Conch. Icon., XVI, 1856, pi. xxx, fig. 159. *PJETEL, Conch. 



Sam., Ill, 1890, p. 153. 



Alexandria, Louisiana, to eastern Texas; Indiana! 

 (Group of Lampsilis iris.) 



Shell rather small, elliptical, moderately solid in front, thinner 

 behind; epidermis covered with dark green, broken rays,, beak sculp- 



1 As of Ravenel, who, however, never described the species. 



