a | a ae 7 
1918.] NATURAL SCIENCES OF PHILADELPHIA. 305 
is a narrow but moderately high crest close behind the outer lip. The 
color is chestnut-brown, becoming paler towards the apex. When alive 
both animal and shell are black. Teeth fine, a small supraparietal 
denticle being developed. The parietal and lower palatal folds are 
rather large. Length 2.6, diam. 1.35 mm.; 53 whorls. 
Except in external sculpture, this form resembles V. modesta from 
Alaska, figured in Proc. A. N.S. Phila. for 1900, pl. 23, fig. 2. By its 
sharp striation V. m. insculpta is quite distinct from all other large 
Vertigos of the Rocky Mountains, but there is a smaller form of V. 
modesta in Labrador which is striate on the spire. 
It is very abundant between 9,000 and 9,500 ft. on Mt. Lemon, 
in and near the aspen zone, where several hundred specimens were 
collected. 
Very beautiful albino specimens occurred in the colonies from Sta- 
tions 30, 31, and 37, Mt. Lemon. 
Other localities for V. m. insculpta are: Santa Catalina Moun- 
tains: Soldier Camp. Mt. Lemon at Stations 19, 22, 28, 30, 31, 
34, 37, at 8,500 to 9,500 ft. 
Vertigo coloradensis inserta Pils. 
In the original V. c. basidens from Bland, New Mexico, there is 
one parietal tooth and the basal is at the foot of the columella, re- 
mote from the lower palatal. In the Santa Catalina series there is 
often a small angular lamella, and the basal fold stands close to 
the lower palatal. 
This form replaces V. c. basidens in the Canadian zone of the Santa 
Catalinas. The type is from Bear Wallow. 
Santa Catalina Mountains: Desert Laboratory plantation, 8,500 
ft.; Bear Wallow Creek, 8,500 ft.; Soldier Camp. Mt. Lemon at 
Stations 19, 22, 28, 31, 9,000 to 9,500 ft.; Alder Springs. Rincon 
Mountains at Station 20. 
V. c. inserta differs from V. c. arizonensis by the development of a 
basal fold, and all of the teeth are larger. 
Recent studies of the group have convinced us that Vertigo colum- 
biana utahensis Sterki is identical with V. coloradensis Ckll. The 
former name is therefore superfluous. Our record of V. c. utahensis 
from the Chiricahua Mountains, in these Proceedings for 1910, 
p. 144, should be changed to V. coloradensis. 
ANCYLIDZ& 
Gundlachia californica Rowell. 
Santa Catalina Mountains: Sabino Canyon, at Alkali Spring, 
Lowell U. S. Ranger Station, on leaves of Plantinus wrighti. 
