Fig. 2 



Fig. 3 



Via. i 



Fit'. 6 



Results of ovarian transplantation in guinea-pigs. Ovaries from a small black guinea-pig (Fig. 2) 

 •vere transplanted into an albino (Fig. 3) which, mated with another albino (Fig. 4), produced black 

 young (Figs. 5-7). 



