TEXTBOOK 



OF 



GENERAL ZOOLOGY 



BY 



WINTERTON C. CURTIS 



Professor of Zoology, University of Missouri 

 AND 



MARY J. GUTHRIE 



Associate Professor of Zoology, 

 University of Missouri 



NEW YORK 

 JOHN WILEY & SONS, Inc. 



London: CHAPMAN & HALL, Limited 



1927 



