No.1205. svxoi'six OF THE .Y.//.I /;/>'->/.wsoA r . 543 



Pr. Ac, X. 8<-i. Phila., VI, 1853, p. 254. 15. II. WRIGHT, Check List, 1888. 

 *P.ETEL, Conch. Sam. ,111, 1890, p. 162. 

 * Margarita (Unio) pectorosus LEA, Syn., 1836, p. 23, 1838, p. 18. 



Tennessee and Cumberland river systems. 



tLAMPSILIS BRACTEATUS Gould. 



*Unlo Iracteatus GOULD, Pr. Bost. Soc. N. Hist., V, 1855, p. 228; *Otia Conch., 



1862, p. 217.* B. H. WRIGHT, Check List, 1888. 

 *Maryaron ( Unio) bracteatus LEA, Syn., 1870, p. 43. 



Llanos, Guadalupe, and Colorado rivers, Texas. 



tLAMPSILIS VENUSTUS Lea. 



*Unio renustus LEA, Tr. Am. Phil. Soc., VI, 1838, p. 4, pi. n, fig. 4; *Obs., II 

 1838, p. 4, pi. n, fig. 4.* TUOSCHEL, Arch. frir. Naturg., V, 1839, II, p. 233. 



* HANLEY, Test. Moll., 1842, p. 192 ; * Biv. Shells, 1843, p. 192, pi. xxiu, fig. 5. 

 *CATLOW and REEVE, Conch. Nom., 1845, p. 65. * CONRAD, Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 258.* CHENU, 111. Conch., 1858, pi. xxn, figs. 1, la, 

 16. "H. and A. ADAMS, Gen. Rec. Moll. ,11, 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 LEA, 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 the marsupium very distinct and well rounded below ; inner 

 edge of the mantle usually beautifully and evenly toothed behind. 



tLAMPSILIS ANODONTOIDES Lea. 



t*E7nio anodontoides LEA, Tr. Am. Phil. Soc., IV, 1834, p. 81, pl.vm, fig. 11; 

 *Obs.,I, 1834, p. 91, pi. vin, 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, 36.* REEVE, Conch. Icon., XVI, 1865, pi. xix, tig. 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. 

 *Mar;/aron ( Unio) anodontoides LEA, Syu., 1852, p. 36; 1870, p. 58. 

 ^Lampsilis anodontoides BAKER, Moll. Chicago, Pt. 1, 1^98, p. 100, pi. x, figs. 1, 



2.* SMITH, Bull. U. S. Fish Com. 1899, p. 290, pi. LXXVIII. 

 *?Unio <ereSAY, Am. Conch., VI, 1834. 1 * CONRAD, New F. W. Shells, 1834, p. 72; 



Monog. VI, 1836, p. 52, pi. xxvm. * FERUSSAC, Guer. Mag., 1835, p. 27. 



* CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 259. * KUSTER, Conch. Cab. 

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



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

 tion is of a youug sh-ll 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. 



