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 



