312 



PROCEEDINGS OF THE ACADEMY OF [NoV.-Df'C., 



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 dryon 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 SonoreUa and Oreohelix, Vitrina alashana 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 closelj' 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. PI. VI, figs. S, 8a, 86. 



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; 



