TABLE OF CONTENTS 



PAGE 

 PREFACE TO THE FIRST EDITION . V 



PREFACE TO THE THIRD EDITION xi 



LIST OF ILLUSTRATIONS X1X 



LESSON I. 



-AMCEBA l 



LESSON II. 



H/EMATOCOCCUS 23 



LESSON III. 



HETEROMITA 3 6 



LESSON IV. 



EUGLENA 44 



LESSON V. 



PROTOMYXA AND THE MYCETOZOA 49 



