NO. 3205. SYNOPSIS OF THE XJIADES—STMrSON. 543 



Pr. Ac. N. Soi. Phila., VI, 1853, p. 2,54.— '^ B. H. Wright, Check List, 1888.— 

 *P^TEL, Conch. Sam., Ill, 189G, p. 162. 

 ""Margarita ( Unio) peotorosus Lea, Syn., 1836, p. 23, 1838, p. 18. 



Tennessee and Cumberland river systems. 



tLAMPSILIS BRACTEATUS Gould. 



Tfnio hracteatus Gould, Pr. Bost. Soc. N. Hist., V, 1855, p. 228; *Otia Conch., 



1862, p. 217.—^ B. H. AVright, Check List, 1888. 

 *Margaron {Unio) hracteatus Lea, Syn., 1870, p. 43. 



Llanos, Guadalupe, and Colorado rivers, Texas. 



tLAMPSILIS VENUSTUS Lea. 



*Unio venustus Lea, Tr. Am. Phil. Soc, VI, 1838, p. 4, pi. ii, fig. 4; *Obs., II 

 1838, p. 4, pi. II, fig. 4.—^ Thoschel, Arch. fiir. Naturg., V, 1839, II, p. 233.— 



* Haxley, Test. Moll., 1842, p. 192 ; * Biv. Shells, 1843, p. 192, pi. xxiii, fig. 5.— 

 "^Catlow and Eeeve, Conch. Nom., 1845, p. 65. — -Conrad, Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 258.—"^ Chenu, 111. Conch., 1858, pi. xxii, figs. 1, la, 

 lb.—'"}!, and A. Adams, Gen. Rec. Moll., II, 1857, p. 495.— *B. H. Wright, 

 Check List, 1888.— ^ P.etel, Conch. Sam., Ill, 1890, p. 171.— * Call, Tr, 

 Acad. Sci. St. Louis, 1895, p. 57. 



* Margarita {Unio) venustus I^^ea, Syn., 1836, p. 24; 1838, p. 19. 

 *Margaron ( Unio) venustus Lea, Syn., 1852, p. 27; 1870, p. 43. 



Potosi, Missouri. 



(Group of Lampsilis anodontoides.) 



Shell elongated, inflated, moderately solid, sharply pointed behind; 

 that of the female much produced at the posterior base, behind which 

 it is diagonally truncate; epidermis very bright, smooth and shining, 

 but feebly rayed; beaks not prominent, marked with very delicate 

 regular sculpture, the posterior loop often open behind; pseudocardi- 

 nals smooth, generally compressed; nacre shining, white or purplish. 

 Animal with themarsupium very distinct and well rounded below; inner 

 edge of the mantle usually beautifully and evenly toothed behind. 



tLAMPSILIS ANODONTOIDES Lea. 



\*Unio anodontoides Lea, Tr. Am. Phil. Soc, IV, 1834, p. 81, pi. viii, fig. 11; 

 *Obs.,I, 1834, p. 91, pi. VIII, fig. 11.— *Hanley, Test. Moll., 1842, p. 204.— 



* Catlow and Reeve, Conch. Nom., 1845, p. .55.—* Chenu, 111. Conch., 1858, pi. 

 XIV, figs. 3, 3a, 3&.— * Reeve, Conch. Icon., XVI, 1865, pi. xix, fig. 87.—* B. H. 

 Wright, Check List, 1888.—* Simpson, Proc U. S. Nat. Mus., XV, 1892, p. 

 430, pi. lxxi, fig. 7 ; lxxii, figs. 1, 2, 4. 



*Margarita { Unio) anodontoides Lea, Syn., 1836, p. 35; 1838, p. 24. 

 ^Marijaron { Unio) anodontoides Lea, Syn., 1852, p. 36; 1870, p. .58. 

 ^Lampsilis anodontoides Baker, Moll. Chicago, Pt. 1, 1898, p. 100, pi. x, figs. 1, 



2.—* Smith, Bull. U. S. Fish Com. 1899, p. 290, pi. lxxviii. 

 *?Unio teres Say, Am. Conch., VI, 1834.i—* Conrad, New F. W. Shells, 1834, p. 72; 



Monog. VI, 1836, p. 52, pi. xxviii.— * Ferussac, Guer. Mag., 1835, p. 27. — 



* Conrad, Pr. Ac N. Sci. Phila., VI, 1853, p. 259.— * Kuster, Couch. Cab. 

 Unio, 1854, p. 68, pi. xvii, figs. 1, 4. 



' Said to be of Rafiuesque, 1820. I can not be positive whether Rafinesque's descrip- 

 tion is of a young shell of this species or the fallaciosus. He gives its length as 3 

 inches. I therefore use the name applied by Lea, his shell being properly described 

 and figured. 



