Department of the Interior 



Ray Lyman Wilbur, Secretary 





S Oi 



U. S. GEOLOGICAL SURVEY 

 George Otis Smith, Director 



Monograph 55 



THE TITANOTHERES OF ANCIENT WYOMING, 

 DAKOTA, AND NEBRASKA 



BY 



HENRY FAIRFIELD OSBORN 



VOLUME 1 



\ ) i 



DocuMmrs department 



RECEIVED 



JAM 2 m? 

 Wilbui Cross Library 

 Univeisity ci Connecticut 



UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON; 1929 



