XIV 



TABLE OF COX TEXTS 



D. The xMechanism of Mitosis ..... 



1. function of the .Aniphiaster 



(/7) Theory of Kil)rillar Contractility 

 {b) Other Facts and Theories 



2. Division of the Chromosomes 



E. Direct or Amitotic Division ..... 



1. General Sketch ...... 



2. Centrosome and Attraction-sphere in .Xmitosis 



3. Biological Significance of .Vmitosis 



F. Summary and Conclusion ..... 

 Literature, II. . 



PAGE 



100 



100 

 100 

 106 



I \2 

 114 

 114 



'•5 

 116 



119 



121 



CIIAPTKR III 

 The Germ-cells 



A. The Ovum .... 



1. The Nucleus 



2. The Cytoplasm . 



3. The Egg-envelopes 

 li. The Spermatozoon 



1. The Flagellate Spermatozoon 



2. Other Forms of Spermatozoa 



3. Paternal Germ-cells of Plants 



C. Origin of the Germ-cells 



D. Growth and Differentiation of the Cierm-cells 



1. The Ovum .... 



(a) Growth and Nutrition 



{b) Differentiation of the Cytoplasm. 



{c) Yolk-nucleus . 



2. Origin of the Spermatozoon 



3. Formation of the Spermatozoids in Plants 



E. * Staining-reactions of the Germ-nuclei 

 Literature, III. ..... 



Deposit of Deutoplasm 



CHAPTER IV 

 Fertiliz.\tion of the Ovi 



A. General Sketch ....... 



1. The Germ-nuclei in Fertilization 



2. The Achromatic Structures in Fertilization . 



B. Union of the Germ-cells ..... 



1. Immediate Results of Union 



2. Paths of the Germ-nuclei .... 



3. Union of the Germ-nuclei. The Chromosomes 



C. The Centrosome in Pertilization .... 



D. Fertilization in Plants ...... 



E. Conjugation in Unicellular Forms 



F. Summary and Conclusion ..... 

 Literature, IV. ........ 



M 



180 



iSi 



185 



196 



200 



202 



204 



208 



215 

 222 



229 

 231 



