THE LIVING MACHINE BUILDING FACTORS. 179 



A represents an egg 

 of a starfish. From 

 one half, the unshaded 

 portion, develops the 

 starfish of the next 

 generation, B. The 

 other is distributed 

 without change in the 

 ovaries, ov, of the in- 

 dividual, B. From 

 these ovaries arises 

 the next egg, A', with 

 its germ plasm. This 

 germ plasm is evident- 

 ly identical with that in 

 A, since it is merely a 

 bit of the same handed 

 down through the indi- 

 vidual, B. In the de- 

 velopment of the next 

 generation the process 

 is repeated, and hence 

 B' will be like 5, and 

 the third generation of 

 eggs identical with the 

 first and second. The 

 undifferentiated part of 

 the germ plasm is thus 

 simply handed on from 

 one generation to the 

 next. 



FIG. 50 Diagram illustrating the principle of heredity. 



cells. During the life of the individual this germ 

 plasm is capable of increasing in amount without 



