Transformations Show Epigenetic Somatization 89 
Barfurth has demonstrated that during the first stages 
of development this regeneration is complete. And Roux 
has found that if one cuts quite young frog embryos 
into longitudinal or antero-posterior halves the missing 
parts are completely regenerated in a few hours.®® 
On the other hand, if the regeneration of the optic 
lens in the triton from a tissue other than that from 
which it is developed in ontogeny, is of itself enough 
to exclude preformation decisively, it is nevertheless not 
in any way incompatible with the most complete nuclear 
somatization. If one admits this latter, the histological 
transformation of certain cells would indicate only the 
possibility that in certain ways somatized nuclei may 
become differently somatized, if unusual influences are 
exerted upon them by neighboring nuclei, that is if 
nervous energies other than the usual ones act upon 
them; and they would undergo this new somatization 
through the gradual acquisition of new specific, potential 
somatic elements, different from the former ones. By 
itself this transformation certainly does not prove that 
all nuclei of the different cells consist of like idioplasm. 
Further there is no firm support for this supposed 
idioplasmic identity of the nuclei in the researches deal- 
ing with vegetable and animal grafts. 
In order to support such a hypothesis effectively, 
these investigations would have to show a closer relation- 
ship or “harmonicity” (as Véchting would say) between 
different tissues of the same individual or of individuals 
belonging to the same species, than between like tissues 
®°Roux: Uber die verschiedene Entwicklung isolierter erster 
Blastomeren. Arch. f. Entwicklungsmech. der Organismen, 1895, 
Band, I. Heft 4. P. 614. 
