304 PROCEEDINGS OF THE ACADEMY OF [Nov.—Dec., 
Gastrocopta ashmuni (Sterki). : 
Santa Catalina Mountains: Slide on Marble Peak, 8,000 ft., 
rare. 
Galiuro Mountains: Whitlock ranch, on the northern slope. 
Gastrocopta cochisensis (Pils. & Ferr.). 
Santa Catalina Mountains: Alder Springs and Station 25, south- 
west ridge of Marble Peak, 8,500 ft. The shells were dirty when 
collected, like B. quadridens. 
Gastrocopta dalliana (Sterki). 
Santa Catalina Mountains: Station 3, mouth of Sabino Canyon, 
4,500 ft. 
Gastrocopta pellucida hordeacella (Pils.). 
Southern foothills of Rincon Mountains near the cave, Shaw’s 
ranch, Station 148 (1918), at about 3,500 ft. 
Gastrocopta bilamellata (St. & Clapp). 
Galiuro Mountains. 
Gastrocopta quadridens (Pils.). 
Santa Catalina Mountains: Stations 30, 31, 37, and all around 
Mt. Lemon at 9,000 to 9,500 ft. Soldier Camp, one specimen. When 
found alive, the shell is rather copiously plastered with dirt, probably 
attached by the mucous of the animal. 
Gastrocopta pilsbryane (Sterki). 
Santa Catalina Mountains: Station 3, mouth of Sabino Canyon, 
4,500 ft. Alder Springs, very abundant. Station 27, Bear Wallow. 
Station 18, Soldier Camp, 8,500 ft. Station 21, Desert Laboratory 
plantation, 8,500 ft. Station 22, near Marshall Pass, old Mt. Lemon 
trail, 9,000 ft. Station 28, marshy spring, Mt. Lemon trail, 9,000 ft. 
Trail to Webber’s cabin. Station 31, north side of Mt. Lemon. 
Station 26, quartzite slide on Marble Peak, 8,000 ft. Galiuro Moun- 
tains at Whitlock ranch. Rincon Mountains: Spud Rock. 
FERUSSACIDZ. 
Cochlicopa lubrica (Miill.). 
Santa Catalina Mountains: Station 25, ridge to peak Mt. Lemon, 
8,500 ft.; Station 26, slide on Marble Peak, 8,000 ft. Rincon Moun- » 
tains: Spud Rock. 
Vertigo modesta insculpta Pils. 
The shell is similar to V. modesta in contour, but differs by being 
closely and rather sharply striate on the intermediate whorls; the 
first whorl smooth, the last less striate than those preceding. There 
