ZOOLOGY 



OF THE 



INVERTEBRATE ANIMALS 



BY 



ALEX. MACALISTER, M.D., D.Sc., F.R.S., F.S.A. 



PROFESSOR OF ANATOMY If THE UNIVERSITY OF CAMBRIDGE 



SEVENTH EDITION 



LONGMANS, GREEN, AND CO. 



LONDON, NEW YORK, & BOMBAY 



1896 



All rights reserved 



