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‘a HANDBOOK 
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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 que 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 TRINITY COLLEGE, AND PROFESSOR OF ANATOMY 
e IN THE UNIVERSITY OF CAMBRIDGE, 
Cambridae: 
PRINTED AT THE UNIVERSITY PRESS, 
FoR 
LONGMAN, BROWN, GREEN, LONGMANS, AND ROBERTS, 
LONDON. 
1856. 
