







Figure 19. Axolotl tadpole, showing regeneration of blastema four days after 

 section (control). 



%.-.% 





% 



3^ t?^-- » i* 



Figure 20. Same experiment as in figure 19, but with treatment during the 

 four days after section with M/300 mercaptoethanol. No regeneration of 

 blastema. 



