N0.12C5. SYNOPSIS OF THE NAIADES— SIMPSON. 735 



fUNIO PRODUCTUSConrad.i 



Unio producUm Conkad, Monog., Ill, 1836, p. 31, pi. xiv, fig. 1. — * Hanley, Test. 

 Moll., 1842, p. 205; ^ Biv. Shells, 1843, p. 205, pi. xxiii, fig. 17.—* Catlow and 

 Keeve, Conch. Nom., 1845, p. 63. — * Kuster, Conch. Cab. Unio, 1852, p. 66, 

 pi. XVI, fig. 2.—* Conrad, Pr. Ac. Nat. Sci. Phila., VI, 1853, p. 255.—* H. and 

 A. Adams, Gen. Rec. Moll., II, 1857, p. 491.—* B. H. Wright, Check List, 

 1888.—" P.ETEL, Conch Sam., Ill, 1890, p. 164. 



* Margarita {Unio) prodiicius Lea, Syn., 1836, p. 37; 1838, p. 24. 



* Mar gar on (Unio) productus, Lea, Syn., 1852, p. 37; 1870, p. 60. 



* Unio harrotti Kuster, Conch, Cab. Unio, 1861, p. 189, pi. lix, fig. 6. 



North Carolina; Virgiuia; Maryland. 



tUNIO NASUTULUS Lea. (Emend.) 



* Unio nasiitihts ^Lea, Pr. Ac. N. Sci. Phila., VII, 1863, p. 192. 



* Unio nasutulus Lea, Jl. Ac. N. Sci. Phila., VI, 1866, p. 12, pi. iii, fig. 9; * Obs., 



XI, 1867, p. 16, pi. Ill, fig. 9.—* B. H. Wright, Check List, 1888. 



* Margaron {Unio) nasuiuhis Lea, Syn., 1870, p. 60.^ 



Livingston's Creek, Brunswick County, North Carolina. 



t UNIO FISHERIANUS Lea. 



""Uniofisherianus Lea, Tr. Am. Phil. Soc, VI, 1838, p. 8, pi. iv, fig. 8; * Obs., II, 

 1838, p. 8, pLiv, fig. 8.— *Troschel, Arch, fiir Naturg., V, 1839, Pt. 2, p. 

 234.— * Hanley, Test. Moll., 1842, p. 206; * Biv. Shells, 1843, p. 206, pi. xxii, 

 fig. 52. — * 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., 1858, pi. xx, figs. 4, Aa, 4&.— *Kdster, 

 Conch. Cab. Unio., 1J61, p. 205, pi. lxviii, fig. 6. — * Reeve, Conch. Icon., 

 XVI, 1865, pi. XXIV, fig. 113.— * Hartman and Michener, Conch. Cest., 

 1874, p. 90, fig. 187.— *B. H. AVright, Check List, 1888.— * PiETEL, Conch. 

 Sam., Ill, 1890, p. 152. 



* Margarita {Unio) fisherianiis Lea, Syn., 1836, p. 37; 1838, p. 24. 



* Margaron { Unio) fisJierianus Lea, Syn., 1852, p. 37; 1870, p. 60. 



* Unio nasutus Conrad (part),^ Monog., II, 1838, pi. xviii, fig. 1. 



Virginia; Maryland; Pennsylvania, in the Atlantic drainage. 



t UNIO EMMONSII Lea. 



* Unio emmonsii Lea, Pr. Ac. N. Sci. Phila., IX, 1857, p. 86; * Jl. Ac. N. Sci. Phila., 



V, 1862, p. 56, pi. II, fig. 203; * Obs., VIII, 1862, p. 60, pi. ii, fig. 203.—* B. H. 

 Wright, Check List, 1888. 



* Margaron ( Unio) emmonsii Lea, Syn., 1870, p. 60. 



North Carolina. 



1 1 have seen a large number of specimens of what I suppose is this, none of vs^hich 

 exactly agree with Conrad's figure and descrijitiou, but which I can not refer to any- 

 thing else. 



2 So written ; no doubt a typographical error. 



3 Probably only a variety of U. productus Conrad. 



* Conrad's first two figures (under fig. 1) are certainly U. fisJierianus, the third is 

 a female nasutus. 



