1911.] 



NATURAL SCIENCES OF PHILADELPHIA. 



193 



Succinea grosvenori Lea. 



North of the Grand Canyon at Big Spring, Snake Gulch, Station 78; 

 Antelope Valley, Station 40, on ant hills; Finley Reservoir near Mt. 

 Trumbull, and at the northwest base of the same mountain. 



FERUSSACIDJE. 

 Cochlicopa lubrica (Mull.). 



Grand Canyon : Bright Angel Trail, from a short distance below the 

 rim to the foot of the cross-bed sandstone and at the Indian Gardens. 

 Mystic Spring Trail on the Spectacle Cove talus, Station A, and near 

 Seep Spring, about 2 miles west of the trail, both places at the base 

 of the cross-bed sandstone. 



PUPILLID^J. 

 Pupoides marginata (Say). 

 Finley's reservoir near Mt. Trumbull. 



Pupoides hordacea (Gabb). 



Spring on the northwestern side of Mt. Trumbull and at Finley's 

 reservoir; Antelope Valley. 



Pupilla syngenes (Pilsbry). 



Pupa syngenes Pils., Nautilus, IV, p. 3, May, 1890; V, p. 39, pi. 2, figs. 



1, 2. Proc. Acad. Nat. Sci. Phila., 1S90, p. 296, pi. 5, figs. 1, 2 (Arizona) ; 



1900, p. 606, with form dextroversa P. and V. (San Rafael, N. M.). 

 Pupa syngenes Dall, Nautilus, VIII, p. 35 (Beaver Creek, Montana). 



This sinistral species was based on specimens from Arizona, the 

 exact locality unknown, fully described and figured in these Proceedings 

 for 1890. Ten years later a dextral form was noted. Specimens of 

 P. syngenes are before us from San Rafael and Grants, N. M., and 

 Holbrook, Jerome, Purtyman's ranch on Oak Creek, and the Grand 

 Canyon, Arizona. Dall has reported it from Beaver Creek, Mont., 

 but none are known from Wyoming, Colorado or Utah. 



Fig. 6. — Pupilla syngenes dextroversa. San Rafael, N. M. 



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