CONTENTS xi 



CHAPTER PAGES 



XVIII. AFFINITIES AND CLASSIFICATION OF THE MAIN SUBDIVISIONS 



DOUBTFUL GROUPS - 462 474 



General Phylogeny of the Protozoa, 403. 

 Spirochaetes, 466 ; Chlamydozoa, 470. 



BIBLIOGRAPHY - - 475 504 



INDEX ... - - 505517 



