Pr 
Issued September 7. 1910. 
U. S. DEPARTMENT OF AGRICULTURE, 
BUREAU OF ANIMAL INDUSTRY— Bulletin No. 39. 
A. D. MELVIN, Chief of, Bureau. 
INDEX-CATALOGUE 
OF 
MEDICAL AND VETERINARY ZOOLOGY. 
PART 30. 
[Authors: T to Thon.] 
BY 
CH. WARDELL STILES, Ph. D., 
Consulting Zoologist, Bureau of Animal Industry ; Professor of Zoology \ 
U. S. Public Health and Marine-Hospital Service, ■ 
AND 
ALBERT HASSALL, M. R. G. V. S., 
Assistant Zoologist, Bureau of Animal Industry. 
U.S. DEPOSITOR 
WASHINGTON: 
GOVERNMENT 'PRINTING OFFICE, 
1910. 
