THE MOLLUSCA OF COLORADO 



173 



Genus COCHLICOPA (Fer.) Risso. 



Cochlicopa lubrica Mtill. Fig. 12. 



Near West Cliff and Swift Creek, Cockerell 12, 9; 22, 62. 

 Buzzard Creek, Cockerell IS, 360. Plateau Creek and subfossil at 

 Cotapaxi, Cockerell Mss. Custer County, Buzzard Creek and 

 Colorado Springs (Cockerell), Trinidad (Pilsbry), Vanatta Mss. 

 Cionella subcylindrica L. Clear Creek, Ingersoll 35> 39i- 

 Ferussacia subcylindrica L. Williams Canyon, Sampson 

 46, 102. 

 Cionella lubrica. White Earth, Dall 34, 353. 

 We have found about 20 specimens at Boulder. 



Fig. 12. — Cochlicopa 

 lubrica. 



Genus VALLONIA Risso. 



Vallonia pulchella Miill. Fig. 

 South Park, Yarrow 68, 932, 



13- 



Fig. 13. — Vallonia pulchella. 



North America east of the Rocky Mts., Sterki 58, 16. 

 Rio LaPlata, Dall 34, 366. Boulder County (Cockerell), 

 Vanatta Mss. 



Helix pulchella. Estes Park, Binney 5, 623. Blue 

 River Valley, West of Saguache, Los Pinos Agency, 

 Howardsville, Rio LaPlata and North Park, Ingersoll 

 35. 399- 



We suspect that the early records, antedating 

 the description of gracilicosta and cyclo phorella, proba- 

 bly refer to the latter. Professor Cockerell, however, has recently found true pulchella 

 on a vacant lot in Boulder. On the same lot occurs the introduced Agriolimax agrestis, 

 which suggests that this Vallonia may have been also introduced. One specimen of 

 pulchella was found also in Boulder, near Boulder Creek, last spring, by Mr. Sievert R. 

 Rohwer. 



Vallonia gracilicosta Reinh. 



Trinidad and Simpson's Rest near Trinidad (Pilsbry), Vanatta Mss. 



Found fossil at Bear Canyon, three miles south of Boulder, with a number of species 

 which still survive in the region. Some worn specimens collected by Prof. Cockerell at 

 Lake George we refer to this species with some hesitation, and we have received two 

 specimens from Prof. E. Bethel, found fossil by Prof. Geo. L. Cannon in ancient over- 

 wash of the Platte River near Denver, associated with several other species. 



Vallonia cyclophorella Anc. 



North Park (E. A. Barber), Swift Creek, Buzzard Creek, Clear Lake Creek, Divide 

 Creek and Cattle Creek (Cockerell), Vanatta Mss. West Cliff, Sterki 56, loi; 59, 

 272. Pike's Peak, 10,000 ft., Cockerell 30, 130. SaHda, North Mam Creek, Round 

 Mt., North Park and Los Pinos Agency, Cockerell Mss. 



Vallonia pulchella costata Miill. Williams Canyon, Sampson 46, 102. 



Helix pulchella var. costata. Micawber Mine, Rock Creek, Kremmling, Pueblo 

 County, near Salida, Black Lake Creek, Buzzard Creek and near Cattle Creek, Cockerell 

 14, 103. Custer County, Cockerell 22, 62. 



Along the foothills of Boulder County, and perhaps throughout the state, this is our 

 most common land snail and the only Vallonia at all common. It extends well into the 

 mountains, where we have found it near Eldora, 8,500 feet, and Mr. D. M. Andrews col- 

 lected a few at Magnolia. Probably most of the Colorado records of pulchella belong here. 



