192 PROCEEDINGS OF THE ACADEMY OF [March, 



the Grand Canyon on Powell Plateau ; Kaibab-Powell Saddle ; Castle 

 Springs, Snake Gulch; Two Springs, Kaibab Plateau. 



Euconulus fulvus alaskensis (Pils.). 



Bill Williams Mountain. Grand Canyon, Bright Angel Trail, from 

 just below rim to base of cross-bed sandstone. Mystic Spring Trail 

 about 200 feet below rim, and Station C, about a half-mile west of 

 Bass's Camp; "Spectacle Cove," Station A. North of the Grand 

 Canyon; Powell Plateau, Station 18; Kaibab Saddle and plateau at 

 Stations 5, 7, 12, 66, 100; Riggs Spring, Snake Gulch; Castle Springs; 

 Warm Spring Canyon ; spring on the northwest side of Mt. Trumbull. 

 Zonitoides milium meridionalis Pils. 



Bill Williams Mountain. 

 Zonitoides minuscula (Binn.). 



Bill Williams Mountain. Base of Mt. Trumbull. 

 Zonitoides arborea (Say). 



Bill Williams Mountain. Snake Gulch, Station ll 1 



TT. 



LIMAOID^E. 

 Agriolimax hemphilli ashmuni P. and V. 



North of the Grand Canyon in Snake Gulch at Big Spring and 

 Station 49, below the Coconino Smelter; also Station 48. 



SUCCINEXD^E. 

 Suocinea avara Say. 



Bass Station, Grand Canyon R. R. ; Grand Canyon on the Mystic 

 Spring Trail along the slope a few hundred feet below the rim, and 

 in the amphitheatre ^ to f mile west of Bass's Camp, on the upper slope ; 

 "Spectacle Cove" and Seep Spring, 2 miles west of trail, below cross-bed 

 sandstone; red wall sandstone at 5,000 feet. On the north side of the 

 river we found it along Shinumo Creek, in the box of White Creek, and 

 Ferriss and Daniels took it on the Kaibab Saddle, at ( )ak Springs, 

 Snake Gulch, Station 1U-, at Warm Spring Canyon, Station 59, and 

 the Hurricane Fault, Station 46, 6,000 feet, near Mt. Trumbull. 



It lives in a great variety of stations, a large form occurring in humid 

 places, smaller shells in arid situations. 

 Succinea retusa Lea. 



The Greens, 6 miles west of Kanab, Utah; Deception Lake, northwest 

 of Kanab. 



Succinea hawkinsi Baird. 



The Greens, 6 miles west of Kanab, Utah. The specimens seem 

 to be typical of this very rare and distinct species, here first reported 

 from so far south. 



