PROTOZOA OF HIGH MOUNTAIN LAKES IN 

 COLORADO 1 



Bv C. H. Edmondson 3 



In an article published recently in these Studies 3 there is given a 

 list of the protozoa reported up to that time as occurring in Boulder 

 County. The following list, which is the result of collections during 

 the months of July and August, 191 1, in Boulder, Grand, Gilpin and 

 Clear Creek counties, is a duplication, in part, and some addition to 

 the protozoan fauna previously reported from Colorado. Besides the 

 work of the writer, Mr. G. H. Wailes, now of New York, and Dr. E. 

 Penard, of Geneva, Switzerland, both authorities on Rhizopoda, ren- 

 dered assistance by the identification of numerous species from 

 material sent them. 



The chief purpose of this study was to determine, if possible, the 

 maximum alpine distribution of different groups of protozoa, and to 

 observe conditions of environment under which certain species might 

 exist at high altitudes. 



For the most part, high mountain lakes were the source of material, 

 although, in a number of instances, collections were made in moist 

 localities at a considerable distance from lakes. Twenty-one lakes, 

 in the four counties mentioned above, were visited and collections 

 made from them. Of these, eighteen were 10,000 feet or more in 

 altitude. A list of the lakes follows, with their elevations: Park 

 Lake, 8,875 f eet ; Peterson Lake (Eldora Lake), 9,245 feet; Teller 

 Lake, 9,300 feet; Redrock Lake, 10,000 feet; Echo Lake (Clear 

 Creek County), 10,000 feet; Silver Lake, 10,200 feet; Brainard Lake, 

 10,300 feet; Long Lake, 10,400 feet; Yankee Doodle Lake, 10,600 

 feet; Jenny Lake, 10,800 feet; Echo Lake (Gilpin County), 11,072 



* Publication of the Colorado Biological Survey, No. 5. 



■ Editor's Note: This report was kindly prepared by Professor C H. Edmondson, of Washburn College, 

 Topeka, Kansas, at the request of the editor of these Studies. 



* Cockerell, T. D. A., "The Fauna of Boulder County, Colorado," University of Colorado Studies, 

 Vol. VIII, p. 227 el seq., June, ign. 



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