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 ... . 475 504 



INDEX - .... 505517 



