ARTICLE IX. 



TOE MAMMALIA OF THE UINTA FORMATION. 



PAUT I. THE GEOLOGICAL AXD FAUXAL HELATIOXS OF THE UINTA FORMATION. 

 PAHT H. THE CREODOXTA, UODEKTIA AND ARTIODACTYLA. 



BY WILLIAM B. SCOTT, 



PROFESSOR OF GEOLOGV IN PIUN'CETON COLL 



PAUT III. THE PEHISSODACTYLA. 



PART IV. THE EVOLUTION OF THE UNGULATE FOOT. 



BY HENRY K.VIRFIKLD OSBORN, 



PKOFSgSOR OF CO.\IP,VRATlVE ANATOMY IN PKIKCETON COLLGGE. 



Il.I.USTUATED BY FiVE LlTHOORAPIlrC PlATES ASD TiIIRTEES DiAOKAMS. 



Kead before the American Philosophical Society, May 17, 1889. 



This memoir i.s principally descriptive of a collection made by the Princeton Sci- 

 entific Expedition of 1886 in the Bad Lands of the Wiiitc Kivor, Northea.stern Utah. 

 The party was composed of Messrs. Keynolds, Harlan, Ilervey, Baucus, Paton, 

 Kane, all Princeton students, under the able leadership of Mr. Francis Speir, Jr., 

 whose name is connected with so many important pahcontological discoveries. The 

 expedition exi)erienced great difficulties in the field and some risk from the hostile 

 threats of the White River Utes. 



The collection has been skillfully prepared and mounted by Dr. Franklin C. 

 Tlill. The drawings are by Mr. Rudolph Weber. 



A. p. s. — VOL. xvr. 3<;. 



