i3lQ Field Muslum of Natural History. 



A Publication 20s. 



Vol. V. No. 5. 



Report Series. 



to 



ANNUAL REPORT OF THE 

 DIRECTOR 



TO THE 



BOARD OF TRUSTEES 



FOR THE YEAR 1919. 



Chicago, U. S. A. 

 January, 1920. 



ATE 



""""m^ 



