26U 



ORIGIN OF AMPHIBIAN PIGMENT 



BECORD OF NEUEAL CREBT EXCISION EXPERIMENTS 



HOMOPLASTIC NEURAL CREST TRANSPLANTATIONS 



Removal of neural crest material from the normal to a strange site should similarly 

 alter the final pigment pattern of the em'bryo. It is generally too drastic to make the 

 transplant on the same embryo, but comparable stages should be used or the donor material 

 may be taken from an embryo slightly older than the host. 



STAGE 15 



STAGE 16 



STAGE 17 



STAGE 18 



STAGE 18 



STAGE 



STAGE 9 



STAGE 32 



