LABORATOEY DIRECTIONS 

 IN GENERAL ZOOLOGY 



WINTERTON C. CUP.TIS 



Professor of Zoology, University of Missouri 

 AND 



MARY J. GUTHRIE 



Professor of Zoology, University of Missouri 



THIRD EDITION, REVISED 



NEW YORK 



JOHN WILEY & SONS, Inc. 



London: CHAPMAN & HALL, Limited 

 1 1939 



