﻿LAMPSILIS g^ 



Lampsilis t^niata (Conrad). 



Shell moderately convex, long elliptical, rather solid with 



scarcely elevated beaks, which are sculptured with distinct 



somewhat corrugated, doubly-looped ridges; sometimes these 



ridges are greatly broken up ; surface having more or less 



scattered growth lines, often concentrically sculptured in front 



greenish-yellow, with broad, distinct, broken rays; lunule very' 



narrow; left valve with two equal-sized, prominent, slender 



pseudocardinals and two compressed, small laterals ; right valve 



with one elevated pseudocardinal, sometimes with a vestigial 



one above it, and one compressed lateral ; beak cavities shallow; 



muscle scars well impressed ; nacre bluish-white. Male shell 



bluntly pointed or feebly biangidate behind about half way up 



from the base ; female shell with a moderate, wide marsupial 



swelling and ending behind in a blunt point two-thirds of the 



way up from the base. 



Length (male) 80, height 60, diam. 30 mm. 



Length (female) 70, height 45, diam. 26 mm. 



Tennessee and Cumberland River systems. 



Type locality, Flint River, Morgan Co., Ala. 

 Unio tceniatus Conrad, New F. W. Shells, 1834, pp. 26, 72, pi. 



IV, fig. 2.— KusTER, Conch. Cab. Unio, 1862, p. 271, pi. xci, 



fig. 4. 



Margarita (Unio) tcrniatus Lb:a, Syn., 1836, p. 24; 1838, p. 19. 

 Unio taniatns P^Tel, Conch. Sam., Ill, 1890, p. 169. 

 Lampsilis tcpniatus Simpson, Syn., 1900, p. 541. 

 Unio menkianus I,ea, Tr. Am. Phil. Soc, V, 1836, p. 76, pi. 



XIX, fig. 59; Obs., n, 1838, p. 76, pi. XIX, fig. 59.— Hanley, ' 



Biv. Shells, 1843, P- 191, pl- xxiii, fig. 4.— Chenu, 111. 



Conch., 1858, pl. XIX, figs. 4, 4a, 4&.— KusTER, Conch. Cab. 



Unio, 1861, p. 245, pl. Lxxxn, fig. 3._Ruevi;, Conch. Icon., 



XVI, 1865, pl. XXVIII, fig. 140. 

 Margarita (Unio) menkianus Lea, Syn., 1838, p. 19. 

 Margaron (Unio) menkianus Lea, Syn., 1852, p. 2y ; 1870, p. 



43- 



