xo. r.t 5. SYNOPSIS OF THE NAIADES SIMPSOX. 73f) 



tUNIO PRODUCTUS Conrad.' 



Unio product un CONRAD, Monog., Ill, 1836, p. 31, pi. xiv, fig. 1.* HANLEY, Test. 

 Moll., 1842, p. 205 ; * Biv. Shells, 1843, p. 205, pi. xxni, fig. 17.* CATLOW and 

 REEVE, Conch. Norn. ,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.ETKL, Conch Sam., Ill, 1890, p. 164. 



* Margarita ( Unio) productua LEA, Syn., 1836, p. 37; 1838, p. 24. 



* Margaron ( Unio) productus, LEA, Syn., 1852, p. 37; 1870, p. 60. 



* Unio barrotii KUSTER. Conch. Cab. Unio, 1861, p. 189. pi. LIX, fig. 6. 



North Carolina; Virginia; Maryland. 



tUNIO NASUTULUS Lea. (Emend.) 



* I'nio nasiitilus - LEA, Pr. Ac. N. Sci. Phila., VII, 1863, p. 192. 



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



XI, 1867, p. 16, pi. in, fig. 9.* B. H. WRIGHT, Check List, 1888. 



* Margaron ( Unio} nasutuJus LEA. Syn., 1870, p. 60. 3 



Livingston's Creek, Brunswick County, North Carolina. 



tUNIO FISHERIANUS Lea. 



* I'nio fisherianus LEA, Tr. Am. Phil. Soc., VI, 1838, p. 8, pi. iv, fig. 8; *ObS., II, 



1838, p. 8, pi. iv, fig. 8. *TROSCHEL, Arch, fiir Naturg., V, 1839, Pt.2, p. 

 234.* HANLEY, Test. Moll., 1842, p. 206; * Biv. Shells, 1843, p. 206, pi. xxn, 

 fig. 52. * CATLOW and REEVE, 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, 4, 46. *KCSTEK, 

 Conch. Cab. Unio., 161, 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. WRIGHT, Check List, 1888. * P.ETEL, Conch. 

 Sam., Ill, 1890, p. 152. 



* Margarita ( Unio) fisherianus LKA, Syn., 1836, p. 37; 1838, p. 24. 



* Margaron (Unio) fisherianus LEA, Syn., 1852, p. 37; 1870, p. 60. 



* Unio nasutus CONRAD (part), 1 Monog., II, 1838, pi. xvin, 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. n, fig. 203 ; * Obs., VIII, 1862, p. 60, pi. n, 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 which 

 exactly agree with Conrad's figure and description, but which I cannot refer to any- 

 thing else. 



* So written ; no doubt a typographical error. 



3 Probably only a variety of U. productus Conrad. 



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

 a female nasutus. 



