304 THE MERYCOIDODONTID^: 



Osborn, H. F. 



1893 A. The rise of the Mammalia in North America. Studies from the biological laboratories of Columbia 



College; Zoology. Boston. 

 1893B. The collection of fossil mammals in the American Museum of Natural History, New York. Science, 



XXI, p. 261. 

 1898. Paleontological problems. Ibid. (n. s.), VII, pp. 145-147. 



1901. The recent progress of vertebrate paleontology in America. Ibid., XIII, pp. 45-49. 

 1 904. Revised list of casts, models, photographs and restorations of fossil vertebrates. Bull. Amer. Mus. Nat. 



Hist., XX, App., pp. 1-52. 

 1905 A. Ten years' progress in the mammalian paleontology of North America. Amer. Geol., XXXVI, 



pp. 199-229. 

 1905B. Ten years' progress in the mammalian paleontology of North America. Verh. Internat. Zool.- 



Kongr., VI, Bern, 1904, pp. 86-113. 

 190 7 A. Tertiary mammal horizons of North America. Bull. Amer. Mus. Nat. Hist., XXIII, pp. 237-253. 

 1907B. A paleontological trip to northwestern Nebraska. Science (n.s.), XXVI, pp. 871-872. 



1909. Cenozoic mammal horizons of western North America. Bull. U. S. Geol. Surv., no. 361, pp. 1-90. 



1910, 1921. The age of mammals in Europe, Asia and North America. New York; revised edition, 1921. 

 1912. Symposium on ten years' progress in vertebrate paleontology. Correlation and paleogeography. Bull. 



Geol. Soc. Amer., XXIII, pp. 232-256. 



1918. Equids of the Oligocene, Miocene, and Pliocene of North America; iconographic type revision. 



Mem. Amer. Mus. Nat. Hist. (n. s.), II, pt. 1. 

 1929. Titanotheres of ancient Wyoming, Dakota and Nebraska. Monographs U. S. Geol. Surv., LV, 2 vols. 



Osborn, H. F., and Wortman, J. L. 



1893. On the mechanics of the artiodactyl tarsus. Bull. Amer. Mus. Nat. Hist., V, pp. 17-18. 



1894. Fossil mammals of the lower Miocene White River beds. Collection of 1892. Ibid., VI, pp. 199-228. 



OsBURN, R. C. 



1903. Adaptation to aquatic, arboreal, fossorial and cursorial habits in mammals. Amer. Nat., XXXVII, 

 pp. 651-665. 



Owen, D. D. 



1852. Report of a Geological Survey of Wisconsin, Iowa, and Minnesota; and incidentally of a portion of 

 Nebraska Territory. Philadelphia. 



Palackv, J. 



1903. Die Verbreitung der Ungulaten. Zool. Jahrb. Syst., XVIII, pp. 303-341. 



Palmer, T. S. 



1904. Index generum mammalium. A list of the genera and families of mammals. U. S. Dept. Agr., Div. 



Biol. Surv., No. Amer. Fauna, no. XXIII. 



Pavlow, M. 



1900. Etudes sur l'histoire paleontologique des ongules. VII. Artiodactyles anciens. Bull. Soc. Imp. Natur. 

 Moscou, for 1899, pp. 268-328. 



Peterson, O. A. 



1906. The Miocene beds of western Nebraska and eastern Wyoming and their vertebrate faunae. Ann. 



Carnegie Mus., IV, pp. 21-72. 

 1914. The osteology of Promerycochcerus. Ibid., IX, pp. 149-219. 



1919. Report upon the material discovered in the upper Eocene of the Uinta basin by Earl Douglass in the 



years 1908-1909, and by O. A. Peterson in 1912. Ibid., XII, pp. 40-168. 

 1923. Restoration of Merychyus elegans subsp. minimus Peterson. Ibid., XV, pp. 96-103. 

 1928A. The Brown's Park formation. Mem. Carnegie Mus., XI, pp. 87-120. 

 1928B. Osteology of Phenacoccelus typus Peterson. Ibid., XI, pp. 130-174. 

 1931. New species from the Oligocene of the Uinta. Ann. Carnegie Mus., XXI, pp. 61-78. 

 1934. List of species and description of new material from the Duchesne River Oligocene, Uinta Basin, Utah. 



Ibid., XXIII, pp. 373-389. 



Peterson, O. A., and Kay, J. L. 



1931. The Upper Uinta formation of northeastern Utah. Ibid., XX, pp. 293-306. 



