534 PROCEEDINGS OF THE NATIONAL U USE I'M. VGI..XXII. 



* Margarita (Anodonta) sulvexa LEA, Syn., 1836, p. 52; 1838, p. 31. 

 *Anodon subi-exa CATLOW and REEVE, Conch. Norn., 1845, p, 68. 

 *Margaron (Anodonta) subvexa LEA, Syn., 1852, p. 50; 1870, p. 81. 



Black Warrior River, Alabama. 



Section EURYNIA Raflnesque, 1820. 

 (Type, Unio recta Lamarck.) 



Shell oval to oblong; beak sculpture delicate, doubly looped ; mantle 

 double edged and often toothed below; that of the female sometimes 

 developed into a thickened flap at the post base. 1 



(Group of Lampsilis luteolus.) 



Shell shining, generally rayed; beak sculpture often broken, with 

 the posterior loop open behind; pseudocardinals rather small, com- 

 pressed, smooth inside, and often curved slightly upward. 



f LAMPSILIS LUTEOLUS Lamarck. 



* Unio luteola LAMARCK, An. sans Vert., VI, 1819, p. 79. *DESHAYES, An. sans Vert., 



2d ed. VI, 1835, p. 544; 3d ed. II, 1839, p. 671. 



* Unio luteolus HANLEY, Test. Moll., 1842, p. 192. *DE KAY, Zool. of New York, Pt. 



5, 1843, p. 190, pi. xx, fig. 241. * HANLEY, Biv. Shells, 1843, p. 192, pi. xxm, 

 fig. 16. * CATLOW and REEVE, Conch. Norn., 1845, p. 60. * CONRAD, Pr. Ac. 

 N. Sci. Phila.,A T I, 1853, p. 251. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, 

 p. 494. * SOWERBY, Conch. Icon., XVI, 1867, pi. LVIII, fig. 293, 293a, 293ft. 

 *LATCHFORD, Tr. Ottawa F. Nat. Club, 1882, p. 51. *B. H.WRIGHT, Check 

 List. 1888.* P^ETEL, Conch. Sam., Ill, 1890, p. 158.* CALL, Tr. Acad. Sci. St. 

 Lonis, VII, 1895, p. 25, pi. in. 

 *Maryarita (Unio) luteolus LEA, Syn., 1836, p. 25; 1838, p. 19. 



* Maryaron (Unio) luteoliis LEA, Syn., 1852, p. 28; 1870, p. 44. 



* Lampsilis luteolus BAKER, Moll. Chicago, Pt. 1, 1898, p. 103, pis. xi, xxxvn, fig. 12. 

 *Unio inflatus BARNES, Am. Jl. Sci., VI, 1823, p. 266.* CONRAD, New F.W. Shells, 

 1834, p. 69. 



* Mya infiata EATON, Zool. Text-Book, 1826, p. 221. 



* Unio siliquoideus BARNES, Am. Jl. Sci., VI, 1823, p. 269, pi. xm, tig. 150 (out- 



line). *FERUSSAC, Guer.Mag., 1835, p. 27. * CONRAD, Monog., II, 1836, p. 22, 

 pi. x, fig. 1. *C. B. ADAMS, Thompson's Hist, of Vermont, 1842, p. 167; 

 F. W. and L. S. of Vermont, p. 17, 1842. 



* Unio siliquoides KUSTEU, Conch. Cab. Unio, 1852, p. 30, pi. v, fig. 2. 



* Mya siliquoidea, EATON, Zool. Text-Book, 1826, p. 221. 



* Lamptfilis siliquoidea STIMPSON, Shells of New Eng., 1851, p. 14. 



* Unio clnldreni HANLEY, Biv. Shells, 1843, p. 193, pi. xxm, tig. 57. 



* Unio hydianua KUSTER, part, Conch. Cab. Unio, 1861, p. 201, pi. LXVII, fig. 1. - 



* Unio distans ANTHONY, Am. Jl. Conch., I, 1865, p. 156, pi. xm, tig. 2. *B. II. 



WRIGHT, Check List, 1888.* P.TEL, Conch. Sam., Ill, 1890, p. 151. 



* Unio multiradiatus SOWERBY, Conch. Icon., XVI, 1868, pi. LXI, tig. 306. '' 



* Cnio affinis SOWERBY, Conch. Icon., XVI, 18n8, pi. LXI, fig. 307. 



1 Lea has figured a female animal of L. radiatus in Observations II, pi. xv, which 

 has a curious, winglike projection on the mantle at its posterior base. 

 - There are two figures; the first is luteolus, the second is hydianu*. 

 'Changed in errata to luteolus. The figure 306a, pi. LXX, is a genuine multiradiatus. 



