72 
subrostratus, 
Say, 
tasniatus, 
Conrad , 
torsus, 
Raf. 
trapezoides, 
Lea, 
intermptus, 
teres, 
Raf. 
anodontoides, 
. triangularis. 
triqueter, 
Raf < 
[ formosus, 
cuneatus, 
truncatus, 
Raf | 
j donaciformis, 
| elegans, 
tuberculatus, 
Raf j 
j verrucosus, 
1 tuberculatus, 
'lateralis, 
sintoxia, 
pachostea, 
mytiloides, 
triangularis, 
Raf. 
rubra, 
pyramidatus, 
torulosus, 
Raf | 
> gibbosa, 
1 perplexus, 
tenebrosus, 
Conrad, 
trabalis, 
Conrad, 
undatus, 
Barnes, 
trigonus, 
verrucosus, 
Raf 
tuberculatus, 
vibex, 
Conrad, 
velum, 
Say, 
viridis, 
Raf 
ALASMODONTA. 
Alasmodonta costata,i?q/l 
complanata, Barnes , 
confragosa, Say , 
edentula, /SVty, 
marginata, Say, 
margaritifera, 
rUgosa, 
Symphynota com- 
planata. 
scrcptum, 
> Unio margaritifera 
► Alasmodon. arcuatJ 
Say, 
Lea , 
Barnes , 
Lea, 
Swainson , 
Lea , 
Lea, 
Barnes, 
Val. 
Raf 
Raf 
Raf. 
Raf. 
Raf. 
Lea , 
Raf 
Lea, 
Lea, 
Barnes, 
Barnes, 
Lea, 
Raf 
, Lam. 
i, Barnes, 
