TABLE OF CONTENTS 



PAGE 



LIST OF FIGURES xiii 



INTRODUCTION AND CHAPTER I 



Introduction .............. I 



A. Historical Review 5 



B. Modern Classification of the Protozoa 15 



C. Animals and Plants .22 



D. Generation de novo 26 



.CHAPTER II 



GENERAL SKETCH 



A. General Morphology 34 



1. The Endoplasm 34 



2. The Ectoplasm 3 8 



3. Nuclei 4 



4. Organs of Locomotion 43 



B. General Physiology 4 



1. Nutrition . . . . .48 



2. Excretion 5 2 



3. Reproduction . . '54 



4. Irritability 60 



C. Some Economic Aspects of the Protozoa .62 



CHAPTER III 



THE SARCODINA 



A. Shells and Tests 7 1 



B. Pseudopodia . 79 



C. The Nucleus 86 



D. The Contractile Vacuole 87 



E. Encystment 9 



F. Nutrition .9 



G. Reproduction 9 2 



H. Inter-relationships of the Sarcodina 99 



Classification I5 



ix 



