42 His whole position is thtis surrendered 



why, even then, it rrmst follow that useful and 

 consentient variations will appear just when 

 and where they are wanted, is more than 

 Weismann has seriously attempted to prove ; 

 though he confidently asserts that it is so. 

 What is important about his new theory 

 however is the surrender both of the an- 

 cestral continuity and also of the somatic 

 discontinuity of the germ-plasm, a surrender 

 that, as Delage and many others have urged, 

 undermines his whole position. In short, 

 while the groimd on which was based his 

 direct and positive proof of the impossibility 

 of the inheritance of acquired characters is 

 abandoned, his full and definite admission 

 of the need for some equivalent of that 

 Lamarckian factor remains. We may then 

 now resume our consideration of what I have 



unchanged." Kellogg, Op. eit. p. 201. But cf. especially Plate, 

 Die Bedeutung det Darwinischen Seleetiontprincipes, 2te Auf. 

 1903, pp. 164-70. 



