﻿86 r,AA!PSii,is 



Lea's shell is perhaps not adult. U. Imdslcyi Lea is, I believe, 

 the same thing', but Lea's shells are older, a little solider and 

 slightly more inflated. 



Lampsilis CAMEivOPARDii^is (Lea). 



Shell long elliptical or long rhonnboid, subsolid, with subin- 

 flated valves, rounded in front, with a low, rounded posterior 

 ridge, rounded at the basal part of the posterior end and 

 obhquely truncate above ; beaks only moderately full, not ele- 

 vated, their sculpture not seen ; surface smooth, shining, pale 

 greenish-yellow, with broad, broken rays, which generally form 

 a series of distinct, square spots, one concentric row on each 

 season's growth; left valve with two equal, rather high sub- 

 compressed pseudocardinals, the posterior one under the beak, 

 and two short, straight laterals ; right valve with a single 

 pseudocardinal, with a vestigial tooth in front of it and an- 

 other behind it, and one lateral ; muscle scars well impressed ; 

 nacre bluish-white. The female shell is more evenly rounded 

 behind and is less truncate on the upper part of the posterior 

 end than the male. The latter is slightly rounded on the base ; 

 it has a feeble, widely rounded post-basal inflation, and is 

 straight or faintly incurved on the base. 



Length (male) 60, height 30, diam. 16 mm. 



Length (female) 55, height 27, diam. 16 mm. 



Tennessee and Cumberland River systems. 



Type locality. Northern Alabama. 

 Ufiio camclopardilis Lea, Pr. Ac. N. Sci. Phila., IV, i860, p. 



02: Jl. Ac. N. Sci. Phila., IV, i860, p. 355. pi. i.ix. fig. 180; 



Obs., VIII, i860, p. 2,7^ Pl- ^^^' %• i^- 

 Margaron (Unio) camclopardilis Lea, Syn., 1870, p. 53. 

 Lampsilis camelopardilis Simpson, Syn., 1900, p. 542. 

 Unio fucatns Lea, Pr. Ac. N. Sci. Phila.. IV. i860, p. 92 ; JI. 



Ac. N. Sci. Phila., IV, i860, p. 353, pi ux, fig. 178; Obs., 



VIII, i860, p. 35, pi. ux, fig. 178. 

 Margaron (Unio) fucatns Lea, Syn., 1870, [). 43. 



