THE MORPHOLOGY AND SYSTEMATIC POSITION OF PODOMITRIUM 203 
the antheridium can be recognized (fig. 4-, A). The development of 
the antheridium is almost exactly like that of Blyttia, and indeed does 
not show any marked departure from the type characteristic of the 
Jungermanniales. The mother-cell of the antheridium divides first 
Fig. 4.^^, B. Very young antheridia, seen in longitudinal section. B is cut 
in a plane at right angles to that of ^ ; X 335. C. Cross-section of a somewhat older 
stage, X 335; J^-^ the primary median wall. D. Nearly median section of an older 
antheridium. E, F. Two sections, slightly oblique of an older stage. G. Median 
section of a ripe antheridium, X 75. sc, the subtending scale. 
