io8 INHERITANCE 



through the presence of a great reserve stock of 

 gemmules of every kind, from all parts, Moreover, 

 it must be borne in mind that the component cells 

 of the body are not simple, homogeneous structures, 

 but that, as is daily becoming more and more 

 evident, some at any rate of them have an exceed- 

 ingly complex structure, consisting of parts of very 

 different composition, and discharging very different 

 functions. Hence it must follow that many kinds 

 of gemmules, each in enormous numbers, must be 

 required from a single cell in many cases. Inas- 

 much as the body structure of the young and of 

 the adult animal are different, there must also be 

 different sets of gemmules for the several stages 

 of existence : and it becomes a matter of the ut- 

 most difficulty to form the slightest conception of 

 how these different sets take up the running in 

 successive stages of development. If we remember 

 that gemmules from all parts, from each component 

 cell of the body, have not only to be formed in 

 great numbers, but have also to find their way 

 about the body to be collected together from the 

 most remote parts, and planted in due proportion 

 in each of the ova or spermatozoa of the parent, 

 we become fairly staggered at the magnitude of the 

 operations we are asked to believe that each animal 

 performs with such apparent ease. 



It must also be remembered that Pangenesis 

 requires that besides the active gemmules there 

 must be enormous numbers of latent gemmules, 

 corresponding to ancestral characters, present in 

 each egg and spermatozoon : for Pangenesis ex- 



