AN INTRODUCTION 



ANIMAL MORPHOLOGY 



AND 



Systematic Zoology, 



BY 



ALEXANDER MACALISTER, M. B. Duel., 



PROFESSOR OF COMPARATIVE ANATOMY AND ZOOLOGY, UNIVERSITY OF DUBLIN. 



PART L— INVERTEBRATA. 



LONDON: 

 LONGMANS, GREEN, AND CO. 



^"1876. 



