VII 



THE BRYINE/E 



193 



of truncate. This tetrahedral cell now divides by a transverse 

 wall into an upper cell, corresponding to the " cover cell " of 

 the Liverwort archegonium, and an inner one (Fig. 93, A), 



fe w 



PQ 



which gives rise, as in the Hepaticae, to the egg and ventral 

 canal cell. From this point, however, the development proceeds 

 in another way, and follows the method observed in Andre(2a. 



o 



