

LEECHES (HIRUDINEA)^^; 



Their Structure, Physiology, 

 Ecology and Embryology 



by 



K. H. MANN 



DEPARTMENT OF ZOOLOGY 



THE UNIVERSITY 



READING 



With an appettdix on the Systematics 



of Marine Leeches 



by Prof. E. W. Knight-Jones 



PERGAMON PRESS 



NEW YORK • OXFORD • LONDON • PARIS 

 1962 



