TABLE OF CONTENTS 



XV 



CHAPTER V 



Reduction of the Chromosomes, Oogenesis and Spermatogenesis 



PAGE 



A. Genera' Outline ............. 234 



1, Reduction in the Female. The Polar Bodies ...... 236 



2, Reduction in the Male. Spermatogenesis . . . . . . .241 



3, Weismann's Interpretation of Maturation ....... 243 



B. Origin of the Tetrads 246 



1. General Sketch ............ 246 



2. Detailed Evidence ........... 248 



C. Reduction without Tetrad-formation ......... 258 



D. Some Peculiarities of Reduction in the Insects . . . . . . -271 



E. The Early History of the Germ-nuclei ......... 272 



F. Reduction in Unicellular Forms . . . . . . . . . -277 



G. Maturation of Parthenogenetic Eggs 2S0 



Appendix 



1. Accessory Cells of the Testis ......... 284 



2. Amitosis in the Early Sex-cells ......... 285 



H. Summary and Conclusion ........... 285 



J- iterature, V. .............. 287 



CHAPTER VI 



t 



Some Problems of Cell-organization 



A. The Nature of Cell-organs 



B. Structural Basis of the Cell 



C. Morphological Composition of the Nucleus 



I. The Chromatin . . . . . • - . 



{a) Hypothesis of the Individuality of the Chromosomes 

 (/;) Composition of the Chromosomes .... 



D. Chromatin, Linin, and Cytoplasm 



E. The Centrosome . .■ . 



F. The Archoplasmic Structures 



1. Hypothesis of Fibrillar Persistence 



2. The Archoplasm Hypothesis 



3. The Attraction-sphere 



G. Summary and Conclusion 

 Literature, VI 



291 



293 



294 



294 



294 



301 



302 



304 



31^ 

 316 



3>S 



327 

 328 



CHAPTER VII 



Some Aspects of C-iLL-cHEMisTRV and Cell-phvsiology 



A. Chemical Relations of Nucleus ana Cytoplasm 



1. The Proteids and their Allies 



2. The Nuclein Series .... 



3. Staining-reactions of the Nuclein Series 



330 



332 

 334 



