6 PHYSA. 
35. PHYSA ANATINA, Lea. 
Plate 9, fig. 3. 
Shell subfusiform, somewhat inflated, trans- 
arent, thin, whitish ; spire exserted, pointed ; 
itures very much impressed; whorls six, 
ymewhat convex, the last one large; aperture 
ither small and somewhat constricted ; outer 
p a little expanded, thickened and saffron- 
jlor under the margin; columella impressed 
1 the middle and twisted. 
Length 12, diam. 6 mill. 
Northern Tributary of the Arkansas River, 
cansas. 
A pretty species, but having no very 
iarked characters to distinguish it from 
2veral of its allies. 
36. PHYSA HALEI, Lea. 
Plate 8, fig. 14. 
Shell broadly oval, inflated, semi-transpa- 
ent, thin, whitish ; spire obtuse; sutures im- 
(72) 
