18 CENOZOIC MAMMAL HORIZONS OF WESTERN NORTH AMERICA. 



Mercer, H. C. The bone cave at Port Kennedy, Pa. Acad. Nat. Sci. Phila- 

 delphia, Jour., vol. 11, 1899, pt. 2. 



Referred to the Pleistocene, but without comparison with other cave formations and 

 faunae. 



Merriam, J. C. Recent cave exploration in California. Am. Anthropologist, n, s,, 

 vol. 8, 1906, pp. 221-228. 

 Mercer's, Potter Creek, Samwel, and Stone Man caves, probably of Quaternary age. 



ScuDDER, S. H. The effect of glaciation and of the glacial period on the present 

 fauna of North America. Am. Jour. Sci., Sept., 1904, 3d ser., vol. 48, 

 pp. 179-187. 



Shufeldt, R. W. a study of the fossil avifauna of the Equus beds of the Oregon 

 desert. Acad. Nat. Sci. Philadelphia, Jour., vol. 9, 1892, p. 389. 



Sinclair, W. J. A preliminary account of the exploration of the Potter Creek cave, 

 Shasta County, Cal. Science, n. s., vol. 17, 1903, pp. 708-712. 



The exploration of the Potter Creek cave. Univ. California, American 



Archaeology and Ethnology, vol. 2, 1904, pp. 1-27, pis. 1-14. 

 Late Quaternary age. 



New Mammalia from the Quaternary caves of California. Univ. California, 



Bull. Dept. Geology, vol. 4, 1905, pp. 145-161. 

 WiLLiSTON, S. W. An arrowhead found with bones of Bison occidentalis in western 



Kansas. Am. Geologist, vol. 30, 1902, pp. 313-315. 



Arrowhead in undoubted association with an extinct species. Bison occidentalis, in 

 beds referred by Willi ston to the Equus beds. 



The Pleistocene [of Kansas]. Univ. Geol. Survey Kansas, vol. 2, 1896, pp. 



299-308. 



Kansas Pleistocene deposits and faunpe. 

 Worth AN, J. L. See Cope, E. D., and Worth an, J. L. 



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