GUIDE TO THE STUDY 



OF 



ANIMAL PARASITES 



r> 



BY 



WILLIAM A. RILEY, Ph.D., Sc.D. 



Department of Zoology, University of Minnesota 

 AND 



REED O. CHRISTENSON, M.A. 



Department of Zoology, University of Minnesota 



First Edition 

 Second Impression 



McGRAW-HILL BOOK COMPANY, Inc. 



NEW YORK AND LONDON 

 1930 



