ale PROCEEDINGS OF THE ACADEMY OF —_[Nov.-Dec., 
Fig. 9. Genitalia of S. grahamensis, with two details of the penis-papilla. 
Type specimen. 
Mt. Graham, in the Pinaleno Range, Graham Co., Arizona, type 
No. 109,101 A. N.S. P., collected by J. H. Ferriss, 10-14-1913. 
Graham Mountain is composed of crumbling granite (similar to 
that of Nine-mile Water Hole in the Dos Cabezas range), and is 
very dry on both north and south sides. On top there is yellow pine 
and quaking asp forest. Camp was made in Stockton Pass, and a 
couple of hours’ collecting done at Mud Spring, on the summit. 
Besides Sonorella and Oreohelix, Vitrina alaskana was abundant, and 
two young Vallonias were found. The Pinaleno Range lies in line 
with the Chiricahua system, though separated by a rather wide 
mesa, in which the Southern Pacific R. R. runs, from the northern 
end of the Dos Cabezas Mountains. 
S. grahamensis is not closely related to any other species known 
to us. The delicate, spirally striate shell and the rather fusiform 
penis-papilla are characteristic. 
Micrarionta praesidii n. sp. Pl. VI, figs. 8, 8a, 8b. 
The shell is depressed, umbilicate (the width of umbilicus contained 
about 5.7 times in the diameter), thin. The ‘‘dead” shell is grayish 
white above, pale ecru-drab below, with some radial white streaks, 
and at the shoulder a narrow, faintly traced gray band which be- 
comes cinnamon towards the aperture. Under a lens fine gray spiral 
lines are seen in places on the base. The initial half whorl is smooth; 
pate of eal 
