THE 
THIRTY-FIRST ANNUAL REPORT 
OF THE 
BOARD OF DIRECTORS 
OF THE 
ZOOLOGICAL SOCIETY 
OF PHILADELPHIA. 
(Incorporated March 21st, 1859.) 
READ AT THE ANNUAL MEETING OF THE MEMBERS AND LOAN- 
HOLDERS OF THE SOCIETY. 
April 23d, 1903. 
PHILADELPHIA : 
Press of Allen, Lane & Scott. 
1211-1213 Clover Street. 
