01 
OBSERVATIONS. 
Inhabits Flint river, Morgan county, Alabama, ad- 
hering to stones, and is common. 
ANCULOTUS PLICA TUS. 
Plate VIII.— Fig. 18. 
DESCRIPTION. 
Shell suboval, with a short spire, only one whorl 
of which is entire, rounded; body whorl slightly ven- 
tricose, with oblique plaits or lines, which are cr emu- 
lated on the margins of a slight spiral groove near 
the suture; lines of growth prominent; epidermis 
greenish or blackish, with spiral bands; aperture el- 
liptical. 
OBSERVATIONS. 
Inhabits tributaries of the Tennessee river in Ala- 
bama, adhering to stones. 
ANCULOTUS MONODONTOIDES. 
Plate VIIL— Fig. 16. 
DESCRIPTION. 
Shell subglobose, body whorl ventricose, not ab- 
ruptly rounded above; apex eroded; columella with a 
F 
