TREASURY DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wyman, Surgeon-General. 
HYGIENIC LABORATORY.— BULLETIN No. 25. 
M. J. R( )SGXAI Director. 
June, 1906 
ILLUSTRATED KEY 
TO THE 
CESTODE PARASITES OF WAN. 
CH. WARD ELL STILES. 
ft 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
.■5906 . 
