TWENTIETH ANNUAL REPORT 
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 28th, 1892. 
PHILADELPHIA: 
ALLEN, LANE & SCOTT'S PRINTING HOUSE, 
Nos. 229-231-233 South Fifth Street. 
1892. 
