crOl 





QH 

 71 

 A5X 

 NH 



1869 



1919 



E AMERICAN MUSEUM 



OF 



NATURAL HISTORY 



EDUCATION 

 EXPLORATION 

 RESEARCH and 

 PUBLICATION 



FIFTY-FIRST ANNUAL REPORT 

 FOR THE YEAR 19 19 



\ 



THE CITY OF NEW YORK 



Issued May 1, 1920 



