CONTENTS xi 



CHAPTER PAGES 



XVIII. AFFINITIES AND CLASSIFICATION OF THE MAIN SUBDIVISIONS 



DOUBTFUL GROUPS - - . . . 462 474 



General Phylogeny of the Protozoa, 463. 

 Spirochsetes, 466 ; Chlamydozoa, 470. 



BIBLIOGRAPHY - ... 475 594 



INDEX ... . . 605517 



