

A TEXT- BOOK 

 OF ZOOLOGY 



BY THE LATE 



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



PROFESSOR OF BIOLOGY IN* THE UNIVERSITV OF OTAGO, DUNEDIN, N.Z. 



AND 



WILLIAM A. HASWELL, M.A., D.Sc., F.R.S. 



EMERITUS PROFESSOR OF BIOLOGV IN" THE UNIVERSITV OF SYDNEY, N'.S.W. 



IN TWO VOLUMES 

 VOL. I 







WITH ILLUSTRATIONS 



MACMILLAN AND CO., LIMITED 

 ST. MARTIN'S STREET, LONDON 



1921 



