﻿I.AMPSII.IS 167 



Eastern Texas, north to Kansas, through .southern Missouri, 

 western Tennessee, to the Alabama River drainage. 



Type locality, "Africa" ! ! 

 Unio purpurata Lamarck, An. sans V'ert., \T, 1819, p. 71. 

 Unio purpiiratus Lea, Obs. I, 1834, p. 199. — Hanley, Biv. 



Shells, 1843, P- 208, pi. XXII, fig. 5. — KusTKR, Conch. Cab. 



Unio, 1861, p. 185, pi. Lix, fig. I. — Reeve, Conch. Icon., XVI, 



1865, pi. XXIV, fig. 115.— Call, Tr. Ac. Sci. St. Louis, VII, 

 No. I, 1895, p. 38, pi. V. 



Margarita (Unio) pnrpuratns Lea, 1836, p. 39; 1838, p. 25. 

 Margaron (Unio) purpuratus Lea, Syn.. 1852, p. 38; 1870, p. 



61. 

 Lampsilis purpuratus Simpson, Syn., 1900, p. 568. 

 Proptcra purpurata Ortmann, Ann. Car. Mus., VIII, 1912, p. 



Unio ater Lea, Tr. Am. Phil. Soc, III, 1830, p. 426, pi. vii, 

 fig. 9; Obs. I, 1834, p. 40, pi. VII, fig. 9. — Chenu, III Conch., 

 1858, pi. X, figs. 10, i^. 



Unio atra Deshayes, Enc. Meth., II, 1830, p. 582. 



Unio liigubris Say, Am. Conch., V, 1832, pi. xliii ; VI, 1834. 



Unio poulsoni Sowerby, Conch. Icon., XVI, 1866, pi. li, fig. 

 270. 



Unio dolosus Lea, Pr. Ac. N. Sci. Phila., IV, i860, p. 307 ; Jl. 

 Ac. N. Sci. Phila., V, 1862, p. 75, pi. ix, fig. 224; Obs., VIII, 

 1862, p. 79, pi. IX, fig. 224. — Sowerby, Conch. Icon., XVI, 



1866, pi. XLi, fig. 228. 



Margaron (Unio) dolosus Lea, Syn., 1870, p. 61. 



A magnificent shell, the finest and probably the largest Lainp- 

 siiis. It seems to take the place of L. alata in the southwest. 

 It is much more inflated than that species, is darker and more 

 glossy, has a lower dorsal wing and richer nacre. 



Lampsilis permiscens (Lea). 



Shell irregularly obovate, thin, subinflated, gaping at the 

 posterior slope and anterior base, with moderate posterior wing 

 and a full, widely rounded posterior ridge ; beaks low and 

 compressed, their sculpture not seen ; epidermis smooth, 

 smoky, olive to blackish, feebly rayed, darker on the posterior 



