TABLE OF CONTENTS xi 



CHAPTER VIII 







SPECIAL MORPHOLOGY OF THE PROTOZOAN NUCLEUS 



PAGE 



A. The Nuclear Membrane ........... 249 



B. The Linin Network . . . . . . . . . . . . 252 



C. The Nucleolus ............. 253 



D. The Chromatin 253 



E. Kinetic Structures ............ 258 



1. Intra-nuclear Division-centres 259 



2. Extra-nuclear Division-centres 265 



3. The Relation of Extra-nuclear to Intra-nuclear Division-centres . . . 268 



4. The So-called " Centrosomes " in Protozoa 272 



F. General Considerations ............ 273 



CHAPTER IX 



SOME PROBLEMS IN THE PHYSIOLOGY OF THE PROTOZOA 



A. Intra-cellular Digestion in Protozoa . ... . . . . . . 280 



B. Respiration 288 



C. Secretion and Excretion 290 



D. Irritability 294 



E. General Considerations ..........'.. 301 



BIBLIOGRAPHY 311 



INDEX OF AUTHORS 329 



INDEX OF SUBJECTS 335 



