[ssued March 6, 1911. 
U. S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ANIMAL INDUSTRY— BULLETIN NO. 
A. I). Ml LVIN, I i in i -I Bureau. 
INDEX-CATALOGUE 
MEDICAL AND VETERINARY ZOOLOGY. 
PART 33. 
[Authors: W to WerbitzkL] 
BY 
CH. WARDELL STILES, Ph. D., 
Consulting Zoologist , Bureau of Animal Industry; Professor of Zoology \ 
('. S. Public Health and Marine-Hospital Service, 
AND 
ALBERT HASSALL, M. R. C. V. S., 
Assistant Zoologist^ Bureau of Animal Industry. 
WASHINGTON: 
GOVE R N M E N T PRINTING OP PI C B 
19 1 I . 
