XX CONTENTS 



CHAPTER III 



PAGE 



Multiplication r,\ Fission — 



1. Preliminary remarks ....... 14c 



2. The process of fission in the Naidcp . . . .146 



3. The process of fission in the i\Iic7-oslomid(T . . . 149 



4. The phylogeny of the process of multiplication by fission 151 



CHAPTER IV 



Multiplication by Gemmation — 



1. The process of gemmation in animals .... 154 



a. Coelenterata . . . . . . . .154 



d. Polyzoa . . . . . . . . .158 



c. Tunicata ........ i6o 



2. The process of gemmation in plants . . . .163 



3. Comparison of the process of gemmation in animals and 



plants 166 



4. The phylogeny of the process of multiplication by gem- 



mation ......... 168 



CHAPTER V 



Alternation of Generations in its Relation to the 



Idioplasm 173 



CHAPTER VI 



The Formation of Germ-Cells — 



1. The continuity of the germ-plasm ..... 183 



2. The germ-tracks ........ 192 



3. Historical account of the theory of the continuity of the 



germ-plasm . . . . . . . . .198 



4. Objections to the theory of the germ-plasm . . . 202 



5. Galls 218 



CHAPTER VII 

 Summary of Part II. (Chapters II. -VI.) .... 225 



PART III. — THE PHENOMENA OF HERED- 

 ITY RESULTING FROM SEXUAL RE- 

 PRODUCTION 



Introductory Remarks on the Nature of Sexual Repro- 

 duction 230 



