248 
Unio perplexus, Say, 1830, Am. Con. i 135 
personatus, Oct. 7, 1829, N. H. D. ii. 308 131 
peruvianus^ Lam. ? Syn. 41 225 
phaseolus, Hildreth, Sept. 1831, Am. Con. iii. pi. 22 17l 
phaseolus, Hildreth, Syn. 20 224 
pileus, Lea, Syn. 27.. 224 
planulatus, Lea, Syn. 20, v. phaseolus, Hild 224 
planiis^ Barnes, Syn. 4 223 
plicata, 1816, 1818, 1819, N. E. 1, 2, 3 eds. pi. f. 4 50 
plicatus, Syn. 55 225 
politus, Syn. 53 225 
Gray ? Syn. 20 224 
prcelongus, Barnes, Syn. 8 223 
purpurescens^ Sow. Syn. 4 223 
purpureus, 1816, 1818, 1819, N. E. 1, 2, 3 eds. pi. 2, f. 1 ,* Oct. 
21, 1829, N. H. D. ii. 324 ; 1840, Desc. 7 50, 135 
purpuriatus, Jan. 15, 1830, N. H. D. 1840, Hesc. 6, 133 
pustulatus. Lea, Syn. 28 224 
pustulosus, Lea, Syn. 30 224 
pyramidatus, Lea, Syn. 38 224 
quadrulus, Raf. Syn. 29, April, 1834, Am. Con. vi. pi. 53. ..207, 224 
radiatus, Gm. ? Syn. 2 223 
rariplicatus, Lam. Syn. 55 225 
rectus, Lam. Syn. 8 223 
reflexus, Raf. Syn. 25 224 
retusus, Raf. Syn. 26 ,224 
ridibundus,, Oct. 1829, N. H. D. ii. 308 ; Am. Con. 1830, 
i. pi. 5 154, 131 
rotundatus, Lam. ? Syn. 32 224 
rubiyinosusj Lea. Syn. 22 224 
Tuyosus, Barnes, Syn. 29, v. U. quadrulus, Raf. 224 
scalenus, Raf. Syn. 35 224 
securis, Lea, Syn. 18, v. U. lineolatus, Raf. 224 
siliquoides, Barnes, Syn. 2 223 
soleniformis, Lea, Syn. 50 225 
solenoides, Raf. Syn. 10 224 
stapes^ Lea, yar. Syn. 26 224 
stegarius, Raf. Syn. 37 224 
subovatus, Lea, Syn. 11 224 
subrostratus, Jan. 15, 1830, N. H. D. ; 1840, Desc. 7, 
Syn. 58 134, .225 
subrotundusj Lea, Syn. 53 225 
subrotundus, Raf. Syn. 32 224 
subtentus, Nov. 1825, J. A. v. 130 ; April, 1831, Am. Con. ii. 
pi. 15 118, 165 
sulcatus, Lea, Syn. 33 224 
sulcatus. Lea, 1830, Am. Con. i. pi. v 154 
tenuis simus^ Lea, Syn. 4 223 
teres, Raf. Syn. 42 225 
tetralasmus, Sept. 1831, Am. Con. iii. pi. 23.... 173 
triangularis, Raf. Syn. 34 224 
triangularis, Barnes, 1830, Am. Con. i. pi. 4 153 
triangularis, Barnes, Syn. 15 224 
trapezoides, Lea, Syn. 47 225 
trigonus, Lea, Syn. 57 225 
triqueter, Raf. Syn. 15 ....224 
truncatus, Raf. Syn. 16, Am. Con. vii. pi. 67 230, 224 
