XX CONTENTS 



CHAPTER III 



PAGE 



Multiplication i?y Fission — 



1. Preliminary remarks ....... 145 



2. The process of Hssion in the Naidce .... 146 



3. The process of fission in the Microsloinida . . . 149 



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



CHAPTER IV 



Multiplication by Gemmation — 



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



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



b. Polyzoa . . . • . . . . . .158 



c. Tunicata . . . . . . . .160 



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 Vll 

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



PART III. — THE PHENOMENA OY HERED- 

 rrV RESULTING FROM SEXUAL RE- 

 PRODUCTION 



Introductory Remarks on the Nature of Sexual Repro- 

 duction . . . . 230 



