CONTENTS 



PAGE 



PREFACE TO THE ENGLISH EDITION ,v 



PREFACE TO THE AMERICAN EDITION . . . . ix 



LIST OF ILLUSTRATIONS . ... . ... xvii 



INTRODUCTION . . . . '/. . . . . i 



Definition of zoology . . . ."..'. . I 



Binomial nomenclature 2 



Individual variations . . ... . . . . 3 



Hybrids . . . 3 



Definition of morphology . . . , . . 4 



Definition of histology . . . . . * . . 4 



Definition of embryology 4 



Classification . 5 



Phyla . .......... 7 



Organic evolution . . . . . . . . 9 



Genealogical tree . 9 



Palaeontology . . 10 



Fossils 10 



Succession of life in time . . . . . ' . . n 

 Phylogeny . . . : * . ... .n 



Distribution of animals, in space and in time , . . 1 1 



The plankton '. . . .12 



The necton . . . . . . . . . .12 



The benthos 12 



Definition of a fauna 12 



Zoo-geographical regions 12 



Definition of physiology 12 



Definition of ethology or binomics 13 



