CONTENTS. 
INTRODUCTION. 
DEFINITION OF THE SUBJECT 
THE CELL P * : 
SoME DIFFERENCES BETWEEN ANIMALS AND PLANTS 
CLASSIFICATION. : ‘ i i P P a 
-& 
CHAPTER I. 
BRANCH di PROTOZOA. j . 4 ; ; 
CHAPTER II. 
BrANcH II. SpoNGEs (PORIFERA) : ‘ : . 
CHAPTER III. 
Brancu III. JELLY-FIsHES, ETC. (CCOELENTERATA) . 
CHAPTER IV. 
BrancH IV. Crinoips, STAR-FISHES, ETC. (ECHINODERMATA) 
CHAPTER V. 
Brancu V. Worms (VERMES) . . F ‘ ‘ 
CHAPTER VI. 
BrANCH VI. SHELLS (MoLLUSCA) . ‘ 5 , 
Ii 
15 
33 
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