132 WEST AMERICAN SHELLS 
resembles the last species but has a more delicate 
shell. It is decidedly a southern form. 
Epiphragmophora colora- 
doénsis, Stearns, the Colo- 
rado Snail, was originally 
found near the Grand Can- 
yon of the Colorado, oppo- 
site the Kaibab plateau, at 
an elevation of 3,500 feet. 
The views of the shell given 
in Figure 108 are magnified, 
but they give the form with 
great detail. The shell is 
rather fragile, and varies 
from pale horn-color to 
white, with a reddish brown 
band. 
Epiphragmophora exara- 
ta, Pfr., the Furrowed Snail, 
is a species which resembles 
a small EK. arrosa. The shell 
is yellowish, with a narrow 
band of chestnut, and the \ 
surface is decidedly plowed Fig. 108, x T (*) 
up with fine transverse fur- 
rows. There are seven whorls, ending in a white, 
slightly reflected lip. This species is from the 
coast region of California, both north and south 
of San Francisco. Its diameter is about an inch. 
