68 
Unio altilis, Conrad , 
bullatus, 
cardium, 
Raf 
capax, 
Green y 
cselatus, 
Conrad, 
camptodon, 
Say , 
cyiindricus, 
Say, 
cor, 
Conrad , 
congarseus, 
Lea, 
cyphia, 
Raf 
*costatus, 
Raf. 
castaneus, 
Lea, 
tcariosus, 
Say, 
compressus, 
cordatus, 
Raf. 
declivis, 
Say, 
decisus, 
Lea, 
dilatatus, 
Raf 
( pustulosus, Lea , 
( nodulosa, Wood , 
ventricosus, Barnes , 
occidens, Lea , 
subovatus, Lea, 
S naviformis, Lam. 
solenoides, JRa/. 
JEsopus, Green , 
cicatricosus, Say, 
varicosus, Lea, 
undulatus, 
Barnes , 
f crassus, 
Say, 
J luteola, 
Lam. 
j cariosa, 
Lam. 
^ellipticus,? 
Barnes, 
Symphynota com- 
pressa, 
Lea, 
obovata, 
Raf 
cuprea, (young,) Raf. 
atroviolacea, Ra/l 
gibbosus, Barnes , 
* There is so great a difference in the colour of the epider- 
mis in a variety of this shell, that it may be considered dis- 
tinct by some Conchologists. The specimen described by Rafi- 
NEsauE had a yellow epidermis, that of Barnes was black. I 
found both varieties in the streams of the Tennesee Valley, in 
Alabama. 
t Mr. Lea gives carinatus, of Barnes, among the synonym es of 
this species, but it is very distinct. It is th efasdata, of Rafi- 
NESQUE. 
