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 unfertilized 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. 
