504 Bulletin American Museum of Natural History. [Vol. XXVII, 



1901, 1903. WiNDLE, B. C. A., and Parsons, F. G. On the Muscles of the 

 Ungulata. Part I. Proc. Zool. Soc, 1901, p. 656; Part ii, ibid., 

 1903, pp. 261-298. 



Hyracoidea have certain significant myological peculiarities in common 

 with Proboscidea ; Perissodactyla sharply separated from Artiodactyla. 



1891-1893. ZiTTEL, K. A. Handbuch der Palfeontologie I. Abth. IV. Bd. 

 Mammalia. 



Sections on the Ungulata. 



Amblypoda, Ccndylarthra. 



1884. Cope, E. D. The Vertebrata of the Tertiary formations of the West. 



Vide supra (p. 476). 



Sections on Phenacodus, Meniscoiherium, Periptychus, Pantolambda, 

 Coryphodon, Uintatherium, etc. 



1884. Marsh, O. C. Dinocerata. . . .Monograph U. S. Geol. Surv., vol. x, 



4°. Washington. 

 1895. Matthew, W. D. A Revision of the Pucrco Fauna. Bull. Amer. 



Mas. Nat. Hist., vol. xxii, pp. 259-323. 



Sections on Euprotogonia and the Periptychida?. 



1898. OsBORN, IT. F. Remounted skeleton of Phenacodus primosvus. 



Comparison with Euprotogonia. Bull. Amer. Mus. Nat. Hist., 



vol. X, pp. 159-164, pi. xii. 

 1892. OsBORN, H. F., AND C. Earle. Fossil Mammals of the Puerco Beds. 



Collection of 1892. BuU. Amer. Mus. Nat. Hist., vol. vii, pp. 1-70. 



Periptychidfe. 



1898. OsBORN, H. F. Evolution of the Amblypoda. Part I. Taligrada 

 and Pantodonta. Bull. Amer. Mus. Nat. Hist., vol. x, pp. 109-218. 



Hyracoidea. 



1906. Andrews, C. W^ A Descriptive Catalogue of the Tertiary Verte- 

 brata of the Fayum, Egypt. Vide supra (p. 497). 

 Sections on Megalohyraz and Saghaiherium. 



1906. OsBORN, H. F. Milk Dentition of the Hyracoid Saghatherium from 

 the Upper Eocene of Egypt. Bull. Amer. Mus. Nat. Hist., vol. 

 xxiii, pp. 263-266. 



1876. DoBSON, G. E. On peculiar Structures in the Feet of certain Species 

 of Mammals which enable them to walk on smooth perpendicular 

 surfaces. Proc. Zool. Soc., June 20, 1876, pp. 526-534, pi. Iv. 



1904. W'eber, jNI. Die Saugetiere. Vide supra (p. 476). 

 Section on Hyracoidea. 



