viii CONTENTS. 



FAQS. 



CHAPTER X. DEVELOPMENT G44 



Metamorphosis 651 



Parthenogenesis and Alternation of Genera- 

 tions 652 



Dimorphism and Polymorphi ? m 654 



Individuality 656 



Hybridity 657 



XI. THE GEOGRAPHICAL DISTRIBUTION OP ANIMALS 658 



Means of Dispersal 660 



Division of the Earth into Faunae 661 



Distribution of Marine Animals 664 



Chief Zoological Faunae of the Earth 66ft 



XII. THE GEOLOGICAL SUCCESSION OP ANIMALS 668 



XIII. THE ORIGIN OF SPECIES 671 



XIV. PROTECTIVE RESEMBLANCE 675 



XV. INSTINCT AND REASON IN ANIMALS 680 



XVI. GLOSSARY 689 



XVIL INDEX., . 697 



