Artificial Parthenogenesis in Plants 279 



for wall formation. It would appear that the action of the acids in 

 inducing a cell-wall to be formed about the unf ertiUzed Fucus eggs is 

 similar to the action which calls forth membrane formation in the 

 animal egg. 



The fact that the method which causes artificial partheno- 

 genesis in. the eggs of many animals acts in the same way 

 in the case of the eggs of plants indicates the identity of this 

 process in all living organisms. 



