FOSSIL LAND MAMMALS AND WESTERN NEARCTIC FAUNA 127 



Bell, W. A. 1949. Uppermost Cretaceous and Paleocene floras of western 



Alberta. Bull. Geol. Surv. Canada, 13. 

 Berry, E. W. 1935. A preliminary contribution to the floras of the White- 

 mud and Ravenscrag formations. Mem. Geol. Surv. Canada, 182. 

 Chaney, R. W. 1936. Plant distribution as a guide to age determination. 



/. Wash. Acad. Sci., 26: 313-324. 

 . 1940. Tertiary forests and continental history. Bull. Geol. Soc. 



Am., 51: 469-488. 

 Colbert, E. H. 1941. A study of Orycteropus gaudryi from the Island of 



Samos. Bull. Am. Museum Nat. Hist., 78: 305-351. 

 Cook, H. J. 1954. A remarkable new mammal from the Lower Chadron 



of Nebraska. Am. Midland Naturalist, 52: 388-391. 

 Darlington, P. J., Jr. 1948. The geographical distribution of cold-blooded 



vertebrates. Quart. Rev. Biol., 23: 1-26, 105-123. 

 Darwin, C. 1859. On the Origin of Species. John Murray, London. 

 Dibblee, T. W., Jr. 1952. Cuyama Valley and vicinity. Guidebook, Calif. 



Oilfields. American Association Petroleum Geologists, Tulsa, Okla., 



pp. 82-84. 

 Durham, J. W. 1950. Cenozoic marine climates of the Pacific Coast. Bull. 



Geol. Soc. Am., 61: 1243-1264. 

 Emerson, A. E. 1952. The biogeography of termites. Bull. Am. Museum 



Nat. Hist., 99: 217-225. 

 Flint, R. F. 1957. Glacial and Pleistocene Geology. Wiley, New York. 

 Fries, C, C. W. Hibbard, and D. H. Dunkle. 1955. Early Cenozoic ver- 

 tebrates in the red conglomerate at Guanajuato, Mexico. Smith- 

 sonian Inst. Afisc. Collections, 123: 1-25. 

 Gazin, C. L. 1953. The Tillodontia: an early Tertiary order of mammals. 



Smithsonian Misc. Collections, 121: 1-110. 

 Grant, M. 1904. The origin and relationship of the large mammals of 



North America. Rept. New York Zool. Soc, 8: 182-207. 

 Hesse, R., W. C. AUee, and K. P. Schmidt. 1937. Ecological Animal 



Geography. Wiley, New York; 2nd edition, 1951, 

 Jepsen, G. L. 1932. Tubulodon taylori, a Wind River Eocene tubulidentate 



from Wyoming. Proc. Am. Philos. Soc, 71: 255-274. 

 Knowlton, F. H. 1917. Fossil floras of the Vermejo and Raton formations 



of Colorado and New Mexico. U. S. Geol. Surv. Prof. Paper, 101: 



223-435. 

 . 1924. Flora of the Animas formation. U. S. Geol. Survey Prof. 



Paper, 134: 71-98. 

 Landry, S. O., Jr. 1957. The interrelationships of the New and Old World 



hystricomorph rodents. Univ. Calif. Publ. Zool., 56: 1-118. 

 Langston, W., Jr. 1953. Longirostrine crocodilians from the Tertiary of 



South America. Bull. Geol. Soc. Am., 64: 1520 [Abstr.]. 

 Matthew, W. D. 1915. Climate and Evolution. Special Publ. New York 



Academy Science, 1939 edition. 



