NO. 1205. SYNOPSIS OF THE NAIADES SLVPSON. 771 



t ^Margarita ( Unio) miiltiplicatus LEA, Syn., 1836, p. 12; 1838, p. 14. 

 *Margaron ( Unio) muUiplicatus LICA, Syn., 1852, p. 20; 1870, p. 29. 

 t * Unio eifjhtsii LEA, Pr. Ac. N. Sci. Phila., IV, 1860, p. 306 ; * Jl. Ac. N. Sci. Phila., 

 IV, 1860, p. 367, pi. LXIV, fig. 192 ; * Obs., VIII, 1860, p. 49, pi. LXIV, fig. 192. 



* B. H. WRIGHT, Check List, 1888. * FISCHER and CROSSE, Miss. Sci., Pt. 7, 

 II, 1894, p. 564. 



*Maryaron ( Unio) cightsii LEA, Syn., 1870, p. 29. 



* Unio eighti P.ETEL, Concb. Sam., Ill, 1890, p. 151. 



*Unio atrocostatus REEVE, Concb. Icon., XVI, 1864, pi. iv, fig. 13. (Cliango^ in 

 Errata to Unio Jteros.) 



Mississippi River system generally; Bed River of the North ; Tora- 

 bigbee River, Alabama; southwest to New Leon, Mexico. 



| QUADRULA NICKLINIANA Lea. 



* Unio nicklinianus LEA, Tr. Am. Phil. Soc., V, 1834, p. 28, pi. i, fig. 1 ; * Obs., 1,1834, 



p. 140, pi. I, fig. 1. *HAXLEY, Test. Moll., 1842, p. 175; < Biv. Shells, 1843, p. 

 175, pi. xxi, fig. 52. *CATLOWand REEVE, Concb. Norn., 1845, p. 61. *H. 

 and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 498. *SOWKRBY, Conch. Icon., 

 XVI, 1866, pi. LIII, fig. 276. *B. H. WRIGHT, Check List, 1888. * FISCHER 

 and CROSSE, Miss. Sci., Pt. 7, II, 1894, p. 565. 



* Margarita ( Unio) nicklinianus LEA, Syu., 1836, p. 12; 1838, p. 14. 



* Margaron ( I'nio) nicklinianus LEA, Syn., 1852, p. 19; 1870, p. 28. 



* Plectomerm nicklinianus CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 261. 



* Unio nicklianus KUSTER, Conch. Cab., 1861, p. 218, pi. LXXIII, fig. 3. *P^:TEL, 



Conch. Sam., Ill, 1890, p. 161. 



Mexico; Guatemala. 



t QUADRULA STOLLI von Martens. 



t Unio stolli vox MARTENS, Biol. Centrali-Anier., Mollusca, 1900, p. 492, pi. xxix, 

 fig. 2. 



Rio de las Salinas, Guatemala; Moctezuma River Central America? 1 

 tQUADRULA NEISLERII Lea. 



* Unio neislerii LEA, Pr. Ac. N. Sci. Phila., II, 1858, p. 165; * Jl. Ac. N. Sci. Phila., 



IV, 1859, p. 212, pi. xxvi, fig. 93; *Obs., VII, 1859, p. 30, pi. xxvi, fig. 93. 



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

 *Margaron ( Unio) neislerii LEA, Syn., 1870, p. 29. 



Flint River and Macon, Georgia. 



1 Very close to Quadrula nickliniana Lea. According to von Martens in the above 

 citation the Unio nickliana of Kuster (Conch. Cab. Unio, new ed., p. 218, pi. LXXIII, 

 fig. 3) is not the nicklinianus of Lea, but a new species which he calls Unio stolli. I 

 can not agree with him, as it seems to me that. Kuster's figure represents Lea's 

 species very well. The figure and description of U. stolli given by von Martens rep- 

 resent a more elongated and more plicate shell than the typical nicklinianus of Lea, 

 but I am doubtful whether it is distinct. Lea's shells of both forms are mostly from 

 the Moctezuma River, which is in Central America according to Lea, but the only 

 river of that name I can find is in New Leon, Mexico. Part of von Martens' work 

 describing the Unionidae of Central America has been received as the Synopsis is 

 going through the press, and for the most part too late to avail myself of the large 

 amount of valuable information it contains. 



