NO. 1205. SYNOPSIS OF THE NAIADES SIMPSON. 737 



fUNIO FOLLICULATUS Lea. 



* Unio folliculatus LEA, Tr. Am. Phil. Soc., VI, 1858, p. 38, pi. xi, fig. 33; * Obs., 



II, 1838, p. 33, pi. xi, fig. 33.* TROSCHEL, Arcli. fur Nat., V, 1839, Pt. 2, p. 

 236.* HANLEY, Test. Moll., 1842, p. 204; * Biv. Shells, 1843, p. 204, pi. xxn, 

 fig. 55. * CATLOW and REEVE, Conch. Norn., 1845, p. 59. * CONRAD, Pr. Ac. 

 N. Sci. Phila.,VI, 1853, p. 249.* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 

 491. *CHENU, 111. Conch., 1858, pi. xxm, figs. 4, 4, 4/>. * KUSTER, Conch. 

 Cab. Unio, 1861, p. 202, pi. LXVII, fig. 4.* SOWERBY, Conch. Icon., XVI, 1868, 

 pi. xci, fig. 493.* B. H. WRIGHT, Check List, 1888.* P^TEL, Conch. Sam., 



III, 1890, p. 153. 



* Margarita ( Unio) folliculatus LEA, Syn., 1836, p. 34; 1838, p. 23. 

 * Margaron (Unio) folliculatus LEA, Syn., 1852, p. 35; 1870, p. 57. 



* t Unio exacutus LEA, Pr. Ac. N. Sci. Phila., II, 1872, p. 159 ; * Jl. Ac. N. Sci. Phila., 



VIII, 1874, p. 45, pi. xv, fig. 43; * Obs., XIII, 1874, p. 49, pl.xv, fig. 49. 



* B. H. WRIGHT, Check List, 1888. 



* t Unio rostellum LEA, Pr. Ac. N. Sci. Phila., II, 1872, p. 160 ; * Jl. Ac. N. Sci. Phila., 



VIII, 1874, p. 44, pi. xv, fig. 41; *Obs., XIII, 1874, p. 48, pi. xv, fig. 41. 



* B. H. WRIGHT, Check List, 1888. 



Georgia. 



fUNIO SHEPARDIANUS Lea. 



* Unio shepardianus LEA, Tr. Am. Phil. Soc., V, 1834, p. 95, pi. xm, fig. 38 ; * Obs., I, 



1834, p. 207, pi. xai, fig. 38.* CONRAD, Monog., VIII, 1837, p. 70, pi. xxxix. 

 *FERUSSAC, Guer. Mag., 1835, p. 29. * HANLEY, Test. Moll., 1842, p. 203; 



* Biv. Shells, 1843, p. 203, pi. xxm, fig. 25.* KUSTER, Conch. Cab. Unio, 1852, 

 p. 65, pi. xvi, fig. 1.* CONRAD, Pr. Ac. Nat. Sci. Phila,, VI, 1853, p. 257. 

 *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 491.* ?CHENU, Man., 1859, 

 II, p. 139, fig. 647. * REEVE, Conch. Icon., XVI, 1865, pi. xix, fig. 90.* B. H. 

 WRIGHT, 'Check List, 1888. * P^TEL, Conch. Sam., Ill, 1890, p. 167. 



* Margarita (Unio) shepardianus LEA, Syn., 1836, p. 34; 1838, p. 23. 



* Margaron (Unio) shepardianns LEA, Syn., 1852, p. 35; 1870, p. 57. 



* Unio sheppardianus CATLOW and REEVE, Conch. Norn., 1845, p. 64. 



Altai ii a ha Biver, Georgia. 



(Group of Unio popeii.) 



Shell elongated, narrowed in front, and biangulate behind, with the 

 base slightly sinuate, feebly silicate; beaks not prominent, sculptured 

 with rather fine, somewhat broken, often faint ridges, which have a ten- 

 dency to fall into two rounded loops; pseudocardinals compressed, high, 

 sharp, ragged; laterals long, slightly curved; cavity of the beaks shal- 

 low; cicatrices not deep. The shell is only a little thickened in front, 

 and that of the female is slightly swollen at the posterior base. 



Animal with the marsupium occupying the whole length of the outer 

 gills; ovisacs not separated by a sulcus; gills long, inner a little the 

 larger throughout, generally free their whole length from the abdominal 

 sac; palpi enormous, wide, oval, slightly pointed behind, united two- 

 thirds of their length to the mantle; mantle double on its edge; bran- 

 chial opening large. 



Proc. N. M. vol. xxii 47 



