NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 12>1 



fUNIO FOLLICULATUS Lea. 



"" Unio folliculatus Lea, Tr. Am. Phil. Soc.,yi, 1858, p. 38, pi. xi, fig. 33; * Obs., 



II, 1838, p. 38, pi. XI, fig. 33.— *Troschel, Arch, fiir Nat., V, 1839, Pt. 2, p. 

 236.—* Hanley, Test. Moll., 1842, p. 204; * Biv. Shells, 1843, p. 204, pi. xxii, 

 fig. 55.—* Catlow and Eeeve, Conch. Nom., 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., 18.58, pi. xxiii, tigs. 4, 4a, 4&.— *Kuster, Conch. 

 Cab. TInio, 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) follieuJatus Lea, Syn., 1836, p. 34; 1838, p. 23. 



* Margaron (Unio) folUculatus 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, pi. xv, fig. 49.— 



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



* t Unio rostellitm 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. xiii, fig. 38 ; * Obs., I, 



1834, p. 207, pi. XIII, 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. xxiii, 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) shepardianus Lea, Syn., 1852, p. 35; 1870, p. 57. 



* Unio sheppardianus Catlow and Reeve, Conch. Nom., 1845, p. 64. 



Altamaha Eiver, Georgia. 



(Group of Unio popeii.) 



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

 base slightly sinuate, feebly sulcate; 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 marsuiDium 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 



