Modification of Germinal Constitution of Organisms 151 



YOUNG ^ PURE BLACK LINE AND SOURCE 

 OF TRANSPLANTED OVARIES IN < No 27 



O* No.654- 



27 CROSSED 6*65A AND 

 REMAINED TOGETHER 

 UNTIL DEATH OF Q 



K 



O DIED AND THEIR BLACK COAT- 

 ED FOETUSES WERE REMOVED 

 FROM HE:R UTERUS 



FIG. 58. To show the lack of effect of foster soma upon introduced ova. 

 (Modified from Castle.) See text for further discussion of this figure. 



