84 UNIVERSITY OF COLORADO STUDIES 



55- 

 56. 



57- 



58. 



Sterki. V. "Notes on some northern Pupidae with description of a new species." 



The Nautilus, Vol. Ill, 1890, pp. 135-137. 



****** "Some notes on North American forms of Vallonia." The 



Nautilus, Vol. V, 1892, pp. loo-ioi. 



****** "Preliminarylistof North American Pupidae (north of Mexico)." 



The Nautilus, Vol. VI, 1892, pp. 2-8. 



****** "North American species of Vallonia." The Nautilus, Vol. 



IX, 1895, pp. 16-17. 

 2^ ***** * "Observations on Vallonia." Proc. Acad. Nat. Set. Phila., 



1893, pp. 234-279. 

 5o. ****** "Some notes on the North American Calyculinae, with new 



species." The Nautilus, Vol. XVI, 1902, pp. 89-93. 

 5j ***** * "New Species of Pisidium." The Nautilus, Vol. XX, 1906, 



pp. 17-20. 

 6ia. ****** "Sphasrium hendersoni n. sp." The Nautilus, Vol. XX, 



1901, pp. 69-70. 

 62. Taylor.. J. W. Monograph of the land and fresh-water Mollusca oj tJie British Isles. 



Part 10, 1904. 

 5^ ****** Ibid. Part 12, 1906. 



64. Tryon, Geo. W. "Land and fresh-water shells of North America." Part IV, 

 Smithsonian Misc. Coll., No. 253, 1873. 



65. Vanatta, Edward G. "The geographical distribution of Planorbis umbilicatellus." 

 The Nautilus, Vol. IX, 1896, p. 117. 



55 ***** * AND Henry A. PiLSBRY. " On Bifidaria pentodon and its allies." 

 The Nautilus, Vol. XIX, 1906, pp. 1 21-128. 



67. Ward, Henry B. "A biological reconnoissance of some elevated lakes in the Sierras 

 and the Rockies." Studies from the Zool. Lab., University of Neb., 1904. 



68. Yarrow, H. C. "Report upon the collections of terrestrial and fiuviatile Mollusca 

 made in portions of Colorado, Utah, New Mexico, and Arizona during the years 

 1872, 1873 and 1874." Final Report oj U. S. Geog. Sur West of the looth Meridian 

 (Wheeler), Vol. V, 1875, pp. 923-954. 



List of Localities 

 [In order to avoidjdesignating the portion of the state in which the various stations are 

 located in each instance, this table is presented] 



Animas Valley, La Plata Co. Cattle Creek, Garfield Co. 



Ault, Weld Co. Chalk Creek, Chaffee Co. 



Baker's Park, Mineral Co. Clear Water Creek, Mesa Co. 



Bear Canyon, Boulder Co. Clear Creek, Mineral Co. 



Black Lake, Summit Co. Cottonwood Gulch, Saguache Co. 



Black Lake Creek, Summit Co. . Cotapaxi, Fremont Co. 



Blue River, Summit Co. Craig, Routt Co. 



Boulder, Boulder Co. Crow Creek, Weld Co. 



Buzzard Creek, Mesa Co. Cunningham Gulch, San Juan Co. 



Canyon City, Fremont Co. Davidson's Ranch, Boulder Co. 



Carrizo Creek, Las Animas Co. Del Norte, Rio Grand Co. 



