Intra-selection and Orthoplasy 185 



tion, ivitJi individual accommodation, which last thus takes 

 the lead and marks out the course of evolution. The 

 hypothesis of germinal selection, which is essential to Weis- 

 mann's view, is not at all involved in theirs. In the words 

 of Lloyd Morgan, whose account of the relation between 

 Weismann's views and his own (see Appendix A, II. 1 ) 

 should be turned to : ' Natural selection would work along 

 the lines laid down for it by adaptive modifications. 2 Modi- 

 fication would lead ; variation follow in its wake. Weis- 

 mann's germinal selection, if a vera causa, would be a 

 cooperating factor and assist in producing the requisite 

 variations.' Defrance says on the same point (Ann/e 

 Biol., III., 1899, p. 533): 'He (Weismann) has made use 

 of his personal hypotheses on germ-plasm which are not 

 universally admitted, while the conception of Lloyd Morgan 

 and Baldwin avoids this stumbling-block by not closing 

 inquiry into the processes which enter into play. It is true 

 that this leaves it an hypothesis ; but it is nevertheless 

 true that it offers an intelligible solution of one of those 

 problems which appear on the surface to constitute the 

 most insoluble of enigmas.' Osborn brings into play the 

 further factor of ' determinate variation,' which, if true, 

 would be analogous in its role to Weismann's germinal 

 selection (see citation from Osborn, Appendix A, I.); he 

 also holds that * there is an unknown factor in evolution 

 yet to be discovered.' 



1 Especially the * new statement ' there given. 



2 On this positive ground, I think the term ' organic selection' is to be pre- 

 ferred to ' indirect selection.' Historically, it follows Delage's use of ' Organi- 

 cists ' for the school of writers who lay stress on individual accommodation; 

 and also his use of selection organique see above, Chapter XII. 2. (4, 5, 6) 

 for the process of accommodation shows how similar concepts may suggest an 

 identical term to different writers. 



