\'iv TABLE OF CONTENTS 



PAGE 



('. The Energy of Division ... 289 



1 ). ( Vll-clivision and Growth .... ... 20? 



Literature, VIII '.'.'.'.'.'. 294 



CHAPTER IX 



THEORIES OF INHERITANCE AND DEVELOPMENT 

 A. The Theory of Germinal Localization ... j<,(, 



H. The Idioplasm Theory , oo 



C. Union of the Two Theories ^ O2 



1 >. The Roux-Weismann Theory of Development 303 



E. Critique of the Roux-Weismann Theory 306 



F. On the Nature and Causes of Differentiation 311 



G. The Nucleus in Later Development ....... --21 



H. The External Conditions of Development 32^ 



1 . 1 )evelopment, Inheritance, and Metabolism . . . . . . 326 



J. Preformation and Epigenesis. The Unknown Factor in Development . . . 327 



Literature, IX \ -, o 



GLOSSARY ,_., 



GENERAL LITERATURE-LIST 34^ 



INDEX OF AUTHORS ~- 9 



INDEX OF SUBJECTS 3 6 5 



