XVI 



TABLE OF COXTENTS 



B. Physiological Relations of Nucleus and Cytoplasm 



1. Experiments on Unicellular Organisms 



2. Position and Movements of the Nucleus 



3. The Nucleus in Mitosis 



4. The Nucleus in Fertilization 



5. The Nucleus in Maturation 



C. The Centrosome ..... 



D. Summary and Conclusion 

 Literature. VII 



PAGE 

 340 



o:) 



I 



J3- 

 353 

 354 

 358 

 359 



CHArrr.R viii 



Cell-division and Development 



A. Geometrical Relations of Cleavage-forms 



B. Promorphological Relations of Cleavage 



1. Promorphology of the Ovum 



(^/) Polarity and the Egg-axis 



(<^) Axial Relations of the Primary Cleavage-planes 



(r) Other Promorphological Characters of the Ovum 



2. Meaning of the Promorphology of the Ovum 



C. Cell-division and Growth ....... 



Literature, VIIL . . 



362 

 37S 

 378 

 37S 



379 

 382 



3S4 

 394 



CHAPTER IX 

 Theories of Lmiekitance and Development 



A. The Theory of Germinal Localization . 



B. The Idioplasm Theory ..... 



C. Union of the Two Theories .... 



D. The Roux-Weismann Theory of Development 



E. Critique of the Roux-Weismann Theory 



F. On the Nature and Causes of Differentiation 



G. The Nucleus in Later Development 

 H. The External Conditions of Development 



I. Development, Inheritance, and Metabolism . 

 J. Preformation and Epigenesis. The Unknown Factor in Development 

 Literature, IX. 



Glossary 



General Literature- list 

 Lndex of Authors . 

 Index of Subjects . 



397 

 401 



403 

 404 



407 



413 



425 

 428 



430 

 431 

 434 



437 



449 



471 



477 



