AN INTRODUCTION TO THE 

 STUDY OF THE 



COMPARATIVE ANATOMY 

 OF ANIMALS 



BY 



GILBERT C. BOURNE, M.A., D.Sc., F.R.S., F.L.S., F.Z.S 



Fellow of Mcrton College and L j nacre Professor of Comparative 

 Anatomy in the University ofOxJord 



VOL. I. 



ANIMAL ORGANISATION. THE 

 PROTOZOA AND Cd.LENTERATA 



SIXTH EDITION, REVISED 



LONDON 



G. BELL & SONS, LTD. 

 1919 



LIBRARY 



UNIVERSITY OF CALIFORNIA 

 DAVIS 



