x CONTENTS. 
CHAPTER IV. 
HISTOLOGY. 
Independent Cells 
Dependent Cells ... 
Structure of the Cell 
CHAPTER. V. 
GROWTH AND REPRODUCTION. 
Asexual Reproduction 
Sexual Reproduction 
CHAPTER VI. 
COMPARATIVE EMBRYOLOGY. 
Larva and Embryo 
Segmentation 
Types of Larve ... 
Metamorphosis 
CHAPTER VIL 
GEOGRAPHICAL DISTRIBUTION. 
Physical Distribution 
Aquatic Fauna 
Terrestrial Fauna 
/Erial Fauna ; 
Topographical Distribution 
Zoological Realms 
Oceanic Islands ... 
Discontinuous Distribution 
CHAPTER VIII, 
GEOLOGICAL DISTRIBUTION. 
Fossils 
Strata sos 
Extinct Animals 
3c 
31 
es 
DD: 
38 
41 
46 
48 
49 
54 
66 
67 
79 
