[ Lie * j 



MASS. 



CONTENTS 



PAGE 



PREFACE .... . v 



CONTENTS OF SECTIONS IN VOL. I xiii 



LIST OF ILLUSTRATIONS IN VOL. I. ... .... xix 



TABLE OF THE CLASSIFICATION OF THE ANIMAL KINGDOM . . . xxxv 

 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 19 



4. Tissues . 23 



5. Organs 31 



6. The Reproduction of Animals 40 



7. Symmetry .... 41 



8. The Primary Subdivisions or Phyla of the Animal Kingdom . 43 



SECTION II 



PHYLUM PROTOZOA ... 45 



Class I. Rhizopoda . .46 



1. Example of the Class Amceba proteus 46 



2. Classification and General Organisation 47 



Systematic Position of the Example ... 48 



Appendix to the Rhizopoda 64 



Class II. Mycetozoa . ... 66 



1. Example of the Class Didymium difforme <>6 



2. General Remarks . 67 



Class III. Mastigophora . 67 



1. Example of the Class Englena viridis . . '>7 



2. Classification and General Organisation . .... 69 

 Systematic Position of the Example .... .70 



Class IV. Sporozoa . 80 



1. Example of the Class Mouoci/stis ay His 80 



2. Classification and General Organisation .... .81 

 Systematic Position of the Example . ... 82 



8 



ft 





