104 PROCEEDINGS OF THE ACADEMY OF [March, 



Black Range, abundant in the forested zone, chiefly among aspens. 

 Type locaUty, Station 39, around the cattle-trap and lake between 

 McKnight's and Mimbres forester stations. 



It was taken at stations 5, 9, 16^ 17, 26, 28, 30, 31, 33, 34^ 37, 

 39, 42 and 47, well scattered over the ridge and upper slopes from 

 Sawyer Peak to Black Canyon. Single bleached shells were taken 

 in the drift debris of Gallina Creek at Station 1, and in the debris of 

 Middle Percha Creek below Kingston. These were doubtless 

 carried down from the forest zone by freshets. 



This is relatively wider and shorter than P. blandi, with a far less 

 developed crest behind the lip. Typical P. blandi is a decidedly 

 smaller shell. 



Pupoides marginatus (Say). 



A bleached shell was found in drift of the Middle Percha Creek 

 below Kingston, therefore in the foothills rather than the Black 

 Range itself. 



Gastrocopta pellucida hordeacella (Pils.). 



Middle Percha Creek, below Kingston. Not found in the moun- 

 tains. 

 Gastrocopta pilsbryana (Sterki). 



Not uncommon on top. It was taken at 8 stations between Silver 

 Creek and McKnight's ranger cabin. Also on Mineral Creek, 

 near the Oliver Mine, Station 52, and in the Cuchillo Mountains. 



Gastrocopta ashmuni (Sterki). 



Stations 16, Iron Creek, and 54, Little Palomas Creek, a single shell 

 at each. The former station, probably above 7,500 feet, is unex- 

 pected, and above its usual zone in this part of New Mexico. 



Gastrocopta quadridens Pils. 



Stations 16i, Iron Creek near Wright's cabin, and 28, south side 

 of Hillsboro Peak. 



Vertigo coloradensis arizonensis P and V. 



Taken at 10 stations along the range, above 7,500 feet, and doubt- 

 less to be found in the forest zone wherever minutiae are looked for, 

 especially among aspens. 



Vertigo modesta n. subsp. 



This new subspecies will be described in the next paper of this 

 series. It was taken in the Black Range at stations 1, 9, 16^, 24. 

 26, 28, 30, 34, 39, 47. 



