114 EVOLUTION 



WHY LIKE TRENDS TO I^F.OF.T Limn. The 

 fundamental hereditary relation is such that 

 like tends to beget like, and the reason for 

 this is found in the fact, of germinal con- 

 tinuity. As long ago as 1875, Galton pointed 

 out that there is a sense in which ^fre child 

 is as old as the parent: fo? ^]]prj flip pa.rpnf 'a 

 body is developing fr^TT* +^<* ^PrtJHflfH OY1UT. 

 a^residue of unaltered germinal material Ja 

 kept apart to form * v> >p/J"^y* rp ]]o 



oe of wVnrVh hpcorne^ the 



pm'nt. ftf ft pLilH This idea has been in- 

 dependently expressed and more fully de- 

 veloped by Weismann, who states it thus: 

 "In development a part of the germ-plasm 

 [i.e. the essential 



in thfi pnrist.nip.t.i on Q| ^h^ borj Q| the off- 



generation." In many cases the future re- 

 productive cells are visibly set apart at a 

 very early stage before the division of labour 

 in body-making has more than begun; in 

 other cases where the ^future reproductive 

 cells are not visible till much^ later, we argTie 

 by analogy that they are reproductive ceTTs 

 because they have not shared in body- 

 making, but have kept intact the proto- 

 plasmic equipment the full inheritance 



