CONTENTS 



PREFACE 



LIST OF ILLUSTRATIONS IN VOL. I xvii 



TABLE OF THE CLASSIFICATION OF THE ANIMAL KINGDOM . xxxj 



INTRODUCTION 1 



SECTION I 



THE GENERAL STRUCTURE AND PHYSIOLOGY OF ANIMALS . . 10 



1. Amoeba .... .... 10 



2. The Animal Cell .... 14 



3. The Ovum : Maturation, Impregnation, and Segmentation : the 



Germinal Layers 18 



4. Tissues . . 21 



5. Organs ... . .29 



6. The Reproduction of Animals 38 



7. Symmetry 39 



8. The Primary subdivisions or Phyla of the Animal Kingdom . . 41 



SECTION II 



PHYLUM PROTOZOA .43 



Class I. Rhizopoda 44 



1. Example of the Class Amoeba protens . .44 



2. Classification and General Organisation 45 

 Systematic position of the Example . . 46 



Class II. Mycetozoa 61 



1. Example of the Class Didymium difforme . 61 



2. General Remarks 63 



Class III. Mastigophora 63 



1. Example of the Class Euglena viridis . 63 



2. Classification and General Organisation . 65 

 Systematic Position of the Example . 65 



Class IV. Sporozoa 75 



1. Example of the Class Monocystis cujilis . 75 



2. Classification and General Organisation . . 76 



