534 PEOCEEDINQS OF THE NATIONAL MUSEUM. vouxxn. 



"^ Margarita (Anodonta) suivexa Lea, Syn., 1836, p. 52 ; 1838, p. 31. 

 *Anodon suhvexa Catlow and Eeeve, Conch. Nom., 1845, p, 68. 

 ^ Margaron {Anodonta) suhvexa Lea, Syn,, 1852, p. 50; 1870, j). 81. 



Black Warrior Eiver, Alabama. 



Section EURYNIA Rafinesque, 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.^ 



(Group of Lampsilis luteolus.) 



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

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

 pressed, smooth inside, and often curved slightly upward. 



f LAMPSILIS LUTEOLUS Lamarck. 



* Unio luteolaljAMAUCK, An. sans Vert., VI, 18.19, p. 79. — *Deshayes, An. saus 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. xxiii, 

 fig. 16. — * Catlow and Eeeve, Conch. Nom., 1845, p. 60. — * Conrad, Pr. Ac. 

 N. Sci. Phila.,VI, 1853, p. 251.— *H. and A. Adams, Gen. Eec. Moll., II, 1857, 

 p. 494.—* SowERBY, Conch. Icon., XVI, 1867, pi. LViii, fig. 293, 293a, 293b.— 

 *Latchford, Tr. Ottawa F. Nat. Club, 1882, p. 51.— *B. H. Weight, Check 

 List, 1888.—* P^TEL, Conch. Sam., Ill, 1890, p. 158.—* Call, Tr. Acad. Scl. St, 

 Louis, VII, 1895, p. 25, pi. m. 



* Margarita (Unio) luteolus Lea, Syn., 1836, p. 25; 1838, p. 19. 



* Margaron {Unio) luteolus Lea, Syn., 1852, p. 28; 1870, p. 44. 



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

 *Unio inflatus Barnes, Am. Jl. Sci., VI, 1823, p. 266.— * Conrad, NewF.W. Sheila, 



1834, p. 69. 

 ""Mya inflata Eaton, Zool. Text-Book, 1826, p. 221. 



* Unio siliquoideus Barnes, Am. Jl. Sci., VI, 1823, p, 269, pi. xiii, fig. 150 (out- 



line).— *Feruss AC, 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 Kuster, Conch. Cab. Unio, 1852, p. 30, pi. v, fig. 2. 

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



* Lampsilis siliquoidea Stimpson, Shells of New Eng., 1851, p. 14. 



* Unio childreni Hanley, Biv. Shells, 1843, p. 193, pi. xxiii, fig. 57. 



* Unio hydianus Kuster, part. Conch. Cab. Unio, 1861, p. 201, pi. Lxvn, fig. 1. - 



* Unio distans Anthony, Am. Jl. Conch., I, 1865, p. 156, pi. xiii, fig. 2. — * B. H. 



Wright, Check List, 1888.—* P^tel, Conch. Sam., Ill, 1890, p. 151. 



* Unio multiradiatus Sowerby, Conch. Icon., XVI, 1868, pi. LXi, fig. 306. ^ 



* Unio affinis Sowerby, Conch. Icon., XVI, 1888, pi. lxi, fig. 307. 



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

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

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

 ''Changed in errata to luteolus. The figure 306a, pi. lxx, is a genmne multiradiatus. 



