Diagram /. 



Pangenesis. 



B X©C) ( B X©C 

 Stage 2. 



m 



Stage i? 



Stage I. 

 Diagram III. 



Development of 

 Identical Twins. 



Stage 5. 



Stage 4. 



l^J^Jk G 



Stage 3. 



Stage 2. 



Stage 1, 

 Diagram //. 



Continuity of 

 Germ-Plasm. 



To J ace /. 120 



