1382 PHYSA. 
Viewed from the right side, the form of shell 
and columella forcibly remind one of Limnea 
emarginata, Say. 
7. PHYSA PROPINQUA, Tryon. 
Plate 6, fig. 13. 
Shell large, fragile, inflated; spire short, 
apex acute; body whorl almost shouldered, 
very large, covered with distinctly elevated 
lines of growth on the adult specimens; the 
surface frequently exhibits several planes, in- 
stead of being uniformly rounded; aperture 
large, oval, outer lip regularly rounded ; colu- 
mella a little twisted. 
Length 19, diam. 13 mill. 
Jordan Creek, S. W. Idaho. 
This species has a shorter spire, its sutures 
are not well impressed, it has fewer whorls, is 
more ventricose, more solid, and is a smaller 
shell than Ph. ampullacea, Gould. Ph. Lordi, 
Baird, is still more ventricosely inflated, and 
the columella is not twisted, 
(48) 
