Field Museum of Natural History. 



Publication 208. 



Report Series. Vol. VI, No. I. 



ANNUAL REPORT OF THE 

 DIRECTOR 



TO THE 



BOARD OF TRUSTEES 



FOR THE YEAR 1921. 



THfc LIBRARY Of- IHt 



Chicago, U. S. A. 

 January, 1922. 





UNiVERs/ry of umo® 



