THE MOLLUSCA OF COLORADO 



177 



Patula striateUa Anth. Estes Park, Binney 5, 623. Hot Springs, Saguache, Clear 

 Creek, North Park and Estes Park, IngersoU 35, 397. Empire, Ingersoll, 37, 131. 

 Twin Lakes, South Park and mountains near Ft. Garland, Yarrow 68, 931. 



Pyramidula striateUa. Wet Mt. Valley, Black Lake Creek, Plateau Creek, Rio 

 LaPlata, Crested Butte and White Earth, Cockerell Mss. 



We have found it living at Boulder and fossil at Bear Canyon, south of Boulder, 

 have received one specimen collected by Mr. A. Dakan at head of Muddy Creek, in 

 Grand County, others collected at Lake George by S. R. Rohwer, and one collected at 

 Granby by Prof. Bethel. 



Pyramidula shimeki cockerelli Pils. 



Custer and Saguache Counties, Pilsbry 40, 85. Rio LaPlata, Cockerell Mss. 



Prof. Shimek considers this a synonym of P. shimeki. To his paper Pilsbry has 

 made no reply, thus apparently acquiescing therein, but the last specimens placed by 

 him in the collections of the Philadelphia Academy are labeled P. shimeki cockerelli. 

 We have found this species abundant at Eldora, altitude 9,300 feet, more strongly striate 

 than specimens from Beulah, N. Mex., and less so than anthonyi. Immature specimens 

 of the two species are difficult to distinguish. 



Genus HELICODISCUS Morse 

 Helicodiscus parallelus Say. Fig. 21. 



Helix lineatus Say. Animas Valley, Ingersoll 35, 398. 



Possibly this refers to the following species, since 

 described. 



Helicodiscus eigenmanni Pils. 



Trinidad and Simpson's Rest near Trinidad (Pilsbry), 

 Vanatta Mss. 



Prof. Cockerell has presented the University Museum with one specimen from river 



drift at Trinidad. 



Fig. 21. — Helicodiscus par- 

 allelus. 



Fig. 22. — Punctum pygmasum. 



Genus PUNCTUM Morse 

 Punctum pygmaetmi Drap. Fig. 22. 



P. pygmcea minutissima Lea. Willow Creek, 

 Cockerell 14, 102. 



Genus SPHYRADIUM Agassiz 



Sphyradium edentultmi Drap. 



Colorado, Dall 34, 367; Pilsbry & Johnson 43, 33. Howardsville (E. Ingersoll), 

 Estes Park (Rev. E. H. Ashmun), Vanatta Mss. 



Sphyradium alticola Ing. Colorado, Dall 34, 367. 



Pupilla alticola Ing. Cunningham Gulch and Rio LaPlata, Ingersoll 35, 391. 

 Either Empire, Colo., or in Utah, Ingersoll 37, 131. Mam Mts., Cockerell Mss. 



Pupa alticola Ing. Western Custer County, Cockerell 22, 62. 



Pupa simplex Say. Colorado, identical with edentulum, inhabiting both Europe 

 and America, Sterki 53, 377. 



Vertigo simplex Say. Twin Lakes and South Park, Yarrow 68, 928. 



One specimen was recently found by the writer at Eldora and one or two by Prof. 

 Cockerell at Lake George. 



