XX CONTEXTS 



CHAPTER III 



PAGE 



Multiplication by Fission — 



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



2. The process of fission in the A'aidte .... 14O 



3. The process of tission in the Alicrostomidie . . 149 



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



CHAPTER IV 



Multiplication by Gemmation — i 



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



a. Ccelenterata . . . . . . . . 154 - 



b. Polyzoa 15S 



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 



Altern.\tion of Generations in its Relation to the 

 Idioplasm 



CHAPTER VI 



'/J 



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 21S 



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 



