THE OSTEOLOGY OF THE 

 REPTILES 



BY 



SAMUEL WENDELL WILLISTON 



M.D., Ph.D., Sc.D., N.A.S. 



Late Professor of Palaeontology in the University of Chicago 



ARRANGED AND EDITED BY 



WILLIAM KING GREGORY, Ph.D. 



Associate in Vertebrate Palaeontology 



American Museum of Natural History, New York 



Professor of Vertebrate Palaeontology 



Columbia University 



CAMBRIDGE 



HARVARD UNIVERSITY PRESS 



1925 



