THE MOLLUSCA OF COLORADO 



175 



20 miles west of Saguache, Clear Creek, Howardsville and Empire, most abundant at 

 9,000 to 10,000 feet, Ingersoll 35, 393; 37, 131. South Park and Twin Lakes, Yarrow 

 68, 934- 



Hyalina fulva chersina Say. White Earth River, near West Cliff, Micawber Mine 

 (10,000 ft.), Kremmling, Egeria, Buzzard Creek, Surface Creek, Divide Creek and Black 

 Lake Creek, Cockerell 14, loi. 



Conulus fulvus. Near Dillon, Cockerell 15, 360. Custer, Summit, Garfield, Mesa 

 and Delta Counties, Cockerell 22, 62, 64, 65. Egeria 23, 175. 



Found by Mr. D. M. Andrews at Magnolia; by Prof. Cockerell at Lake George; 

 by Sievert R. Rohwer at Florissant; by Prof. Bethel at Granby; and by the writer at 

 Eldora. 



Genus ZONITOIDES Lehmann 



Zonitoides 



Zonitoides arboreus Say. Fig. 16. 



Pike's Peak, 10,000 ft., Cockerell 30, 130. Colorado 

 Springs, Buzzard Creek, Swift Creek and Black Lake Creek 

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

 (Pilsbry), Vanatta Mss. 



Zonites arboreus. Hot Sulphur Springs, Blue River Valley, 

 Howardsville, North Park and LaPlata, Ingersoll 35, 392. 

 South Park and Twin Lakes, Yarrow 68, 933. Wilhams Canyon, 

 Sampson 46, 102. Wet Mt. Valley and subfossil at Grape 

 Creek, Cockerell Mss. 



Hyalina arborea. Near West CUfF, Micawber Mine, Wales 

 Canyon, Slate Creek, Buzzard Creek, Black Lake Creek, Chalk Creek, Divide Creek, 

 Plateau Creek, KremmHng, near Egeria and Manitou, Cockerell 22, 62, 175; 14, 100, 



lOI. 



H. arborea form viridula Ckll. Horseshoe Bend Gulch, Cockerell 14, loi. 



One of the common species along the foothills from Boulder to Lyons, extending 



up into the mountains, where it was found in some numbers by 



Mr. D. M. Andrews at Magnolia. Specimens received from Prof. 



E. A. Kenyon were collected at Florence; some from S. R. Rohwer 



were collected at Florissant, and one from Prof. Bethel was 



collected at Granby. We have found it fossil at mouth of Bear 



Canyon, about 1, miles south of Boulder. The original of the right- 

 FiG. 17.— Zomtoides , , ^ . , . ^ r, ■ -j , 



minusculus. hand figure is designated Z. vtriaulus. 



Zonitoides minusculus Binn. Fig. 17. 



Trinidad (Pilsbry), Vanatta Mss. 



Zonites minusculus. Ft. Garland, Yarrow 68, 934. 



We have found it fossil at mouth of Bear Canyon, three miles 

 south of Boulder. 



Zonitoides conspectus Bland. Fig. 18. 



Zonites conspectus. Cunningham Gulch, Ingersoll 35, 393; 

 Binney 6, 86, 87. 



P. conspecta. San Juan County, Cockerell 14, 103. 



Fig. 18.— Zomtoides All Colorado records are apparently based upon IngersoU's 



conspectus. 



specimens. 



