AX ELEMENTARY COURSE 



OF 



PRACTICAL ZOOLOGY 



:HE LATE 

 T. JEFFERY PARKER, D.Sc., F.R.S. 



PROFESSOR OF BIOLOGY IN THE UNIVERSITY OF OTAGO 

 DfNEDIK, NEW ZEALAND 



AND 



W. N. PARKER, PH.D. 



PROFESSOR OF ZOOLOGY AT THE I'VIVERSITY COLLEGE OF SOUTH WALES 

 AND MONMOUTHSHIKE, IN THE UNIVERSITY OF WALES 



FIFTH EDITION 7 



W ith One Hundred and Sixty-eight Illustrations 



MACMILLAN AND CO., LIMITED 



ST. MARTIN'S STREET, LONDON 



1920 



