CONTENTS xi 



CHAPTER PAGES 



XVIII. AFFINITIES AND CLASSIFICATION OF THE MAIN SUBDIVISIONS 



DOUBTFUL GROUPS ... 462 474 



General Phylogeny of the Protozoa, 463. 

 Spirochaetes, 466; Chlamydozoa, 470. 



BIBLIOGRAPHY - - 475 504 



INDEX ... . . 505517 



