Nuclear Somatization 119 



dition, nevertheless the complicated and characteristic 

 parts of the head were developed up to the surface of 

 amputation completely and in their perfect form, and 

 not only entire structure but also parts of these structures." 



"Whatever development there is going on beyond 

 the stage at which amputation was performed depends 

 essentially on self-differentiation of the individual parts; 

 no correlative influence of the neighboring parts or of 

 the entire organism can ever be recognized, either nega- 

 tively or positively. Thus this development beyond the 

 stage at which amputation was performed, corresponds 

 entirely with Roux's mosaic theory." 82 



Nevertheless, we shall see soon that another whole 

 series of Bern's experiments, as also those just recorded 

 if one considers them from another point of view, are 

 no less opposed to evolutionary hypotheses in general 

 and to hypotheses of pre formation properly so called in 

 particular. 



In short, the observations and experiments which we 

 have thus far cited, from the half-embryos of Roux to 

 the tadpole fragments of Born, all show the possibility 

 that individual parts of the organism, provided they con- 

 tain any part whatever of the vertebral axis, can develop 

 independently of the remaining parts, and are sufficient 

 by themselves alone to prove the inadmissibility of simple 

 epigenesis. 



But the preformists had yet another fundamental 

 objection to make to the epigenesists, who have sought 

 so far in vain for a reply to it : namely that epigenesis 

 requires the renunciation of nuclear somatization. For 

 these two hypotheses are absolutely irreconcilable. It 



82 Born: Uber Vcrwachsungsversuche mit Amphibienlarven. 

 P. 204205. 



