HANDBOOK 



ZOOLOGY 



BY 



J. VAN DER HOEVEN, 



\\ 



PHIL. NAT. ET M.D. PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF LEYDEN, KNIGHT OF THE ORDER 

 OF THE DUTCH LION AND OF THE SWEDISH ORDER OF THE POLAR STAR, MEMBER OF THE ROYAL 

 ACADEMY OF SCIENCES, OF THE DUTCH SOCIETY OF SCIENCES AT HAARLEM, OF THE IMPERIAL 

 LEOPOLDO-CAROLINE ACADEMY, OF THE IMPERIAL SOCIETY OF NATURALISTS AT MOSCOW, COR- 

 RESPONDING MEMBER OF THE BRITISH ASSOCIATION, OF THE ROYAL ACADEMY OF SCIENCES AT 

 TURIN, OF THE ROYAL ACADEMY AT PARIS, ETC. 



Trado quge potui. 



IN TWO VOLUMES. 



VOLUME THE FIRST. 



(INVERTEBRATE ANIMALS. ) 



TRANSLATED FROM THE SECOND DUTCH EDITION 



BY 



THE REV. WILLIAM CLARK, M.D. F.R.S. &c. 



LATE FELLOW OF *ERIJj,ITY COLLEGE, AND PROFSSO.R. QF ANATOMY 

 IN -' S HE UNIVERSITY OF CAMBPJP( '\ 



PRINTED AT THE UNIVERSITY PRESS, 



FOR 



LONGMAN, BROWN, GREEN; LONGMANS, AND ROBERTS, 

 LONDON. 



1856. 



