392 GEOLOGICAL SURVEY OF THE TERRITORIES. 



the middle three of the spire equal, causing a parallelism in the sides of the 

 shell, the last noticeably greater, expanding toward the aperture, not closely 

 oppressed to the body-whorl; suture deeply impressed; aperture small, 

 oblique, subtriangular, margins connected by a thin deposit, without internal 

 processes; peristome simple, somewhat reflected over the umbilicus. Length, 

 2f mm. ; diameter, 1 mm. 



4^1 



Camp 26 : Cunningham Gulch . 25 specimens. 



Camp F : Eio La Plata 5 specimens. 



It will not be difficult to recognize this species by its parallel sides, 

 base-like expansion of the last whorl, coarse incremental lines, and eden- 

 tate aperture. It seems to be an essentially alpine species, none having 

 been found at an elevation less than 8,000 to 9,000 feet. It was plenty 

 in the localities mentioned above. 



Leucochila arizonensis, Gabb. — Fort Grant, Arizona {Hon}) ; Pike's 

 Peak, Colorado (Tryon); White Pine, Nevada (Hemphill). California. 

 Leucochila hordeacea, Gabb. — Fort Grant, Arizona (Horn). 



VERTIGINI1NL33. 



Vertigo californica, Powell. 



Camp 11 : Blue River Valley , . 15 specimens. 



Camp 21 : Los Pinos agency 3 specimens. 



Camp 23 : Divide southwest of Los Pinos 3 specimens. 



Camp 26 : Howard ville 50 specimens. 



Camp D : Animas Valley 2 specimens. 



Camp F : Eio La Plata 4 specimens. 



Pacific coast. 



Vertigo corpulenta, Morse. 



Camp 21 : Los Pinos agency 2 specimens. 



Camp 23 : Divide southwest o* Los'Pinos 1 specimen. 



Eastern slope Sierra Nevada (Stretch; Hemphill). 



Vertigo ovata, Bay. — Fort Grant, Arizona (teste Binney). Eastern 

 United States. 



HELICID^E. 



VITRI3NLE. 



Macrocyclis Vancouver ensis, Lea. — Idaho ; west side of Cceur d'Alene 

 Mountains, in forests of Coniferse ( Cooper) ; Sumass Prairie, Fraser River 

 [Lord). Pacific coast. * 



Zonites arboreus, Say. 



Camp 9 : Hot Sulphur Springs «.■-.. 3 specimens. 



Camp 11 : Blue River Valley 13 specimens. 



Camp 26 : Howardville, Baker's Park 22 specimens. 



Camp F : Rio La Plata 3 specimens. 



North Park (Barber) 2 specimens. 



