392 GEOLOGICAL SUEVEY 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 

 appressed to the hody-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, 

 2| mm. ; diameter, 1 mm. 



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 alinne 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 [Horn) ; Pike's 

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

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



VEETIGININ^. 



Vertigo califomica, Eowell. 



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, Say. — Fort Grant, Arizona {teste Binney). Eastern 

 United States. 



HELICID^. 



VITRIN^. 



Macrocyclis Vancouver ensis, Lea. — Idaho ; west side of Coeur d'A16ne 

 Mountains, in forests of Coniferte ( Ooojper) j Sumass Prairie, Eraser Eiver 

 {Lord). Pacific coast. 



Zonites arboreus, SAY. 



Camp 9 : Hot Sulphur Springs 3 specimens. 



Camp 11 : Blue Eiver Valley 13 specimens. 



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



Camp F : Eio La Plata , 3 specimens. 



North Park {Barber) 2 specimens. 



