FIG. 284. Section through cupule of Marchantia, showing wall in which are chloro- 
phyll-bearing air-chambers with air-pores, and gemmae (a) in various stages of 
development. After DODEL-PORT. 
FIG. 285. Marchantia polymorpha : the lower figure represents a gametophyte bear- 
ing a mature antheridial branch (d), some young antheridial branches, and also 
eome cupules 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, e,f). After KNY. 
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