The Four Phyla of Oligocene 

 Titanotheres 



By Henry Fairf^ield Osborn. 



AUTHOR'S EDITION, extracted from BULLETIN 



OF THE 



J^miericatx g^xtsexxm of Natural gistar^^ 



Vol. XVI, Article VIII, pp. 91-109. 

 New York, Febi^uary 18, igo2. 



