10 



CEXOZOIC MAMMAL HOEIZO:^sS 



Cope. E. D. The relations of the horizons of extinct Vertebrata of Europe and North 

 America. U. S. Geol. and Geog. Suj-^ey Terr.. Bull., vol. 5, No. 1. 1879. 

 Correlation of Mesozoic and Cenozoic horizons of Europe and North America. 



The Vertebrata of the Tertiary* formations of the West. Rept. U. S. Geol. 



Survey Ten-., vol. 3, 1883 il8^). Section I.— The Tertiary- formations 

 of the central region of the United States. Section II. — The horizontal 

 relations of the North American Tertiaries with those of Europe. 



Dall. ay. H. a table of the North American Tertiary horizons correlated with one 

 another and with those of western Europe: with annotations. U. S. 

 Geol. Survey. 18th Ann. Kept.. 1896-97. pt. 2. 1898. 



Marine Tertiary horizons of the Atlantic coast and of the Gulf States correlated 

 with one another, with those of the Western States and those of western Europe. 



Dawkixs. W. Boyd. The clarification of the Tertiary period by means of the 

 Mammalia. Quart. Jour. Geol. Soc.. 1880, pp. 379—405. 



Tertiary and Quatemaiy horizons and faunae of Great Britain, France,, and Italy 

 correlated. 



FiLHOL. H. Obser\'ations sur le memoire de M. Cope inritiile Relations des hori- 

 zons * * * d'animaux vertebres fossiles en Europe et en Amerique. 

 Ann. sci. geol.. vol. 17. art. 5. 1885. pp. 1-18. 



Marsh. 0. C. Geologic horizons as determined by vertebrate fossils. Am. Jour. 

 Sci.. Oct.. 1891. 3d ser.. vol. 42. pp. 336^338. 



Comparative A alue of different kinds of fossils in determining geological age. 



Am. Jour. Sci.. Dec. 1898. 4th ser., vol. 6. pp. 483^86. 

 Value of a form depends upon its modifiability in accordance with changing conditions. 



OsBORX. H. F. Correlation between Tertiary* mammal horizons of Europe and 

 America: an introduction to the more exact investigation of Tertiary 

 zoogeography: preliminar\' study, with third trial sheet. New York 

 Acad. Sci.. Ann., vol. 13. 1900. pp. 1-64. 



< "orrelation des horizons de mammiferes tertiaires en Europe et en Amerique. 



<'ompt. Rend. 8^ Cong. geol. intern.. 1900. pp. 357-363. 



The geological and faunal relations of Europe and Ajnerica during the 



Tertiary period and the theory of the successive invasions of an African 

 fauna. Science, n. s.. vol. 2. 1900. pp. 561-574. 

 Popular presentation of above-cited address. 



GENERAL GEOLOGY AXD FAUX-E f NORTH AMERICA). 



Davis. ^Y. M. The fresh-water Tertiary formations of the Rocky Mountain region. 

 Am. Acad. Arts and Sci.. Proc.. vol. 35, 1900. pp. 346-373. 



History of opinion on mode of formation; evidence against lake-bed hypothesis 

 and in favor of fluviatile origin. 



(^TiLBERT. ( t. K. The undergroimd waters of the Arkansas Valley in eastern Colorado, 

 r. S. Geol. Siu-^ey. 17th Ann. Rept.. pt. 2. 1896, pp. 553-601. 

 Rocky Mountain deposits may be of fluviatile and not of lacustrine origin. 



Johnson. W. d. The High Plains and their utilization. U. S. Geol. Sur\-ey. 21st 

 Ann. Rept.. pt. 4. 1901. pp. 601-741: 22d Ann. Rept.. pt. 4, 1902. pp. 

 631-669. 



Tertiary deposits of the plains, of fluviatile and flood-plain origin. 



Marsh. O. C. Ancient lake basins of the Rocky Mountain region. Am. Jour. Sci., 



Jan.. 1875. 3d ser.. vol. 9. pp. 49-52. 

 — Introduction and succession of vertebrate life in America. Am. Jour. Sci., 



3d ser.. vol. 9. 1877. pp. 337-378. 

 Plate showing succ-essive horizons named from characteristic genera. 



