VI. 



THE BRYALES 



201 



of their structure may ])e made out without difficulty. The 

 first division separates a basal cell from a terminal cell, which 

 is the mother cell of the archegonium. In the latter three walls 



now arise, as in tlic Hepaticse and Andrecra, but in Fiinaria 

 these do not all reach to the basal wall, but intersect at some 

 distance above it, so that they enclose a tetrahedral cell, pointed 



