Fig. 384. Section through cupule of Marchantia, showing wall in which are chloro- 

 phyll-bearing air-chambers with air-poree, and gemmae (a) in various 6tages of 

 development.— After Dodel-Port. 



Fro. 285. Harchantia polymorpha : the lower figure represents a gametophyte bear- 

 ing a mature antheridial branch (d), some young antheridial branches, and also 

 some cupnles with toothed margins, in which the gemmae may be seen ; the 

 upper figure represents a partial section through the antheridial disk, and shows 

 antheridia within the antheridial cavities (a, b, c, d, «,/).— After Knt. 

 21 



