PHYSA. 157 
pressed; whorls five, the last large; aperture 
rounded ; outer lip regularly expanded, white 
and thickened within the margin; columella 
thickened and impressed in the middle, and 
furnished with a fold. 
Length 13, diam. 8°5 mill. 
Alexandria, La. 
This species is nearly allied to Ph. Warren- 
tana, but is smaller, and the spire more ele- 
vated; the columella also is more incurved 
towards its base. 
37. PHYSA GROSVENORII, Lea. 
Plate 8, fig. 13. 
Shell ovately fusiform, nearly straight, 
somewhat inflated, white or pale straw-yellow, 
polished; spire somewhat exserted; sutures 
impressed; whorls five, the last one rather 
large; aperture oval, rather large; outer lip 
somewhat expanded, thickened under the 
margin; columella thickened, very much im- 
pressed, folded and very much twisted. 
(73) 
