NO. 1205. SYNOPSIS OF TEE NAIADES— SIMPSON. 771 



\* Margarita (Unto) multipUcatus Lea, Syn., 1836, p. 12; 1838, p. 14. 



""Margaron {Unto) multqjUcatus Lea, Syn., 1852, p. 20; 1870, p. 29. 



i'^Unioeightsii Lea, Pr. Ac. N. Sci. Phila., IV, 1860, p. 306; *J1. Ac. N. Sci. Phila., 

 IV, 1860, p. 367, pL Lxiv, fig. 192 ; * Obs., VIII, I860, p. 49, pi. lxiv, fig. 192.— 

 *B. H. Weight, Check List, 1888.— * Fischer and Crosse, Miss. Sci., Pt.7, 

 II, 1894, p. 564. 



*Margaron ( Unio) eightsii Lea, Syn., 1870, p. 29. 



* Unio eighti P^etel, Conch. Sam., Ill, 1890, p. 151. 



*Unio airocostatus Eeeve, Conch. Icon., XVI, 1864, pL iv, fig. 13: (Chaugfi^ in 

 Errata to Unio lieros.) 



Mississippi River system generally; Eed Eiver of the l^ortb ; Tom- 

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



tQUADRULA NICKLINIANA Lea. 



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



p. 140, pi. I, fig. 1.— *Hanley, Test. Moll., 1842, p. 175; "Biv. Shells, 1843, p. 

 175, pi. XXI, fig. 52. — *CATLO"wand Eeeve, Conch. Nom., 1845, p. 61. — "H. 

 and A. Adams, Gen. Kec. Moll., II, 1857, p. 498. — *Sowerby, Conch. Icon., 

 XVI, 1866, pi. Liii, fig. 276.— "B. H. AVright, Check List, 1888.— * Fischer 

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



* Margarita ( Unio) nicMinianus Lea, Syn., 1836, p. 12; 1838, p. 14. 



* Mar gar on (Unio) nicklinianus Lea, Syn., 1852, p. 19; 1870, p. 28. 



* Plectomerus nicklinianus Conrad, Pr. Ac. N. Sci. Phila., VI, 1853, p. 261. 



* Unio nichlianus Kuster, Conch. Cab.^ 1861, p. 218, pi. Lxxiii, fig. 3. — *PiETEL, 



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



Mexico; Guatemala. 



tQUADRULA STOLLI von Martens. 



^Unio stolli von Martens, Biol. Centrali-Amer., MoUusca, 1900, p. 492, pi. xxix, 

 fig. 2. 



Eio de las Salinas, Guatemala; Moctezuma River Central America?^ 



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. 



' Very close to Quadrula nicldiniana Lea. According to von Martens in the above 

 citation the Unio nicMiana of Kuster (Conch. Cab. Unio, new ed., p. 218, pi. lxxiii, 

 tig. 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 Unionidse 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. 



