LIVERWORTS. 



143 



and the details of structure are quite different, as we shall see. 

 Underneath the arms there hang down delicate fringed curtains. 

 If we make sections of this in the same direction as we did of 

 the antheridial receptacle, we .shall be able to find what is 



Fig. 122. 

 Marchantia polymorpha, female plants bearing archegoniophores. 



secreted behind these curtains. Here we find the archegonia, 

 but instead of being sunk in cavities their bases are attached to 

 the under surface, while the delicate, pendulous fringes afford 

 them protection from drying. 



