l68 UNIVERSITY OF COLORADO STUDIES 



by Mr. A. Mackenzie on Mt. Audubon, altitude ii,ooo feet, others were collected at Can 

 yon City by Miss Voight, and dead specimens near Glenwood springs by Messrs. Horace. 

 G. Smith and Will Huestis. 



Oreohelix strigosa albofasciata Hemp. 



A few specimens referred to this form were collected near Glenwood Springs by Mr. 

 H. G. Smith, and at Lyons by the writer. In both instances they were associated with 

 typical strigosa. 



Oreohelix strigosa depressa Ckll. 



Durango, Cockerell 12, 8; 14, 102; 23, 107. Foothills near Boulder (Ralph V. 

 Mann), Vanatta Mss. Described and recorded by Prof. Cockerell as a form of cooperi, 

 but now considered a variety of strigosa. 



Mr. S. R. Rohwer has collected a specimen at Boulder with the spire nearly flat. 



Oreohelix strigosa concentrata Dall. 



Colorado, Dall 33, i; 34, 336. Chaffee County, Cockerell 296, 106, 107. 



Patula strigosa minor Ckll. Egeria 23, 175; 28, 135. 



This is probably the same as Prof. Cockerell's var. minor, in which case, if the species 

 is recognizable from Cockerell's description, the latter name would supersede Dall's. 



Oreohelix cooperi W. G. B. Fig. 4. 



Dead shells near Naomi, Black Lake Creek, top of range between Wheeler and 

 Red CUff, Squaw Creek, Grand River at Glenwood Springs (i alive). North Mam Creek, 



Fig. 4. — Oreohelix cooperi. 



near Buzzard Creek (one alive); Plateau Creek, West Fork Clear Water Creek and 

 White Earth, Cockerell Mss. Wheeler and Custer County (Cockerell), Vanatta Mss. 



Patula cooperi. Grand River, Binney 5, 623. Hot Sulphur Springs, Blue River 

 Valley, Lakes in San Luis Valley and N. E. Colorado, Ingersoll 35, 396. Floyd's Hill, 

 Clear Creek and Canyon City, Ingersoll 37, 131. 



Patula strigosa cooperi. Gilpin Gulch, Williams Canyon, Morrison, Gunnison, Middle 

 Park, North Park, Micawber Mine, Kremmling, Hardscrabble Canyon, Black Lake 

 Creek, Pottery Pass, Red Cliff, Glenwood Springs, Buzzard Creek, Surface Creek, White 

 Earth Creek, Lyons, St. Vrain Canyon, Egeria, near Durango, and Custer, Grand, Routt, 

 Pueblo, Summit, Eagle, Garfield, Mesa, Delta and Gunnison Counties, Cockerell 14, 

 102; 22, 62. 



Patula strigosa cooperi. Form typica, Ckll., Canyon City, Manitou, etc.; form 

 trifasciata Ckll., Mesa County; form confluens Ckll., Custer, Garfield, and Mesa Counties; 

 form elevata Ckll., Delta Co.; form depressa Ckll., Durango; form major Ckll., North 

 Mam Creek; form wiwor Ckll., Egeria; Cockerell 12,8; 14,102; 23,175; Binney7,i73. 



Helix cooperi. Abundant in Williams Canyon, Beauchamp 2, 53. 



Oreohelix cooperi mut. sinistrorsa. A sinistral specimen found by Prof. Cockerell's 

 brother in Southern Colorado. Cockerell Mss.; Pilsbry 39, 83. 



