utfuoui*.] ZOOLOGY SUCIMNm. 399 



Helix Mullani, Bid. and J. G. Cp. — Cceur d'Alene mission, Bitter 

 Boot Mountains and River, Idaho (Cooper) ; Idaho (Binney). 



Helix fidelis, Gray. — Large but very pale variety, Sum ass Prairie, 

 Fraser River (Lord). Pacific coast. 



Helix Town'sendiana, Lea — "Both slopes of the Bitter Root Mountains, 

 from 2,200 to 5,000 feet high. Large variety at the base of the range 

 to 4,800 feet ; small variety in dry prairie at junction of Hell-Gate and 

 Bitter Root Rivers" (Cooper). Sum ass Prairie, Fraser River; small 

 variety Fort Colville, summit of Rocky Mountains (Lord) ; east of Fort 

 Colville, Washington Territory (iV. W. Bound. Surv.). Pacific coast. 



The small variety from northwest Idaho has been described as a new 

 species by Mr. A. D. Brown under the name of Helix ptychophora (Jour- 

 nal de Conchologie, 1870), giving as its habitat Bitter Root Mountains 

 and Nebraska. It is regarded as a variety only. 



Helix pulchella, Muller. 



Camp 11 : Blue River Valley .'. 16 specimens. 



Camp 20 : West of Saguache 4 specimens. 



Camp 21 : Los Pinos Indian Agency 65 specimei s. 



Camp 26 : Howard ville, Baker's Park 50 specimens. 



Camp F : Rio La Plata : 10 specimens. 



North Park (Barber) 25 specimens. 



"This American form (minuta) of the Old-World pulchella, Milll., has 

 only lately been found west of the Rocky Mountains. I obtained an 

 immature specimen near Truckee, in May. * * * Mr. Harford after- 

 ward found it common near Donner Lake, a few miles above Truckee; 

 and Mr. Hemphill has also found them common near White Pine Mount- 

 ains. Not having been found north of Canada, its circumpolar distri- 

 bution, though asserted by Middendorf, is doubtful; he, like most 

 authors, considering it identical with pulchellaP — Dr. J. G. Cooper. 



Helix Dupetit-Thouarsi, Desh. — Klamath Lake, Oregon (Ncivberry) ; 

 Sumass Prairie (Lord). Pacific coast. 



Helix tudiculata, Binn. — Truckee, Nevada (Carlton). Pacific coast. 



SUCININJE. 



Succinea Uuttalliana, Lea. 



Camp 9 : Hot Sulphur Springs . . . , 30 specimens. 



Camp D : Animas Valley 1 specimen. 



Warm Springs, near Salt Lake, Utah (Beid) ; Snake River (JSfuttall) ; 

 Wright's Lake and Rhett's Lake, northeast California (Newberry). Pa- 

 cific coast. 



Succinea oralis, Gould. 



Camp 10 : Mouth of Blue River 1 specimen. 



Eastern States. 



Succinea rusticana, Gould. 



Camp 9 : Hot Sulphur Springs 12 specimens. 



Sumass Prairie, Fraser River (Lord) ; Rocky Mountains of Bitter Root 

 Valley, 2,500 to 4,500 feet (Cooper); White Pine region, Nevada (Hemp- 

 hill). Pacific coast. 



These, three species are hardly to be distinguished. I separated 

 them as above after examination of shells in the Museum of Comparative 

 Zoology, but they merge into one another indeterminately^ 



