Issued August 18, 1911. 
U. S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ANIMAL INDUSTRY— Bulletin No. 39. 
A. D. MELVIN, Cimh- of Bukkau. 
INDEX- CATALOGUE 
OP 
MEDICAL AND VETERINARY ZOOLOGY. 
PART 35. 
[Authors: Y to Zypkin.] 
BY 
CH. WARDELL STILES, Ph. D., 
Consulting Zoologist, Bureau of Animal Industry ; Professor of Zoology, 
U. S. Public Health and Marine-Hospital Service^ 
A N I ) 
ALBERT HASSALL, M. R. C. V. S., 
Assistant Zoologist, Bureau of Animal Industry. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1911. 
