ten cells in thickness, enclosing the young poroph> > the 



h of the calyptra the uir 1 archegonta are earned up, some- 



times appearing almost at the MIIH- These sterile arche- 



gonia may become much elongated and their necks twisted. 



A. An old archegonium of Pallaiifinu radifttlosa. with much 



.per part of a iniilar archcgonium. showing 



ncv 

 C. Young archcgonium of /' l.r.tfri. x joa 



>cx of a somewhat older one, showing 



terminal cell*. 



ung archcgonium of the same species. 



rig of the 

 of the 



