54 BOTANICAL GAZETTE [yowy 
a rae _ ie . 
abnormal antheridium, or it is a sporangium; if it is the latter, this — 
is a case of apogamy. The great difference in size is seen by com: — 
Figs. 9, to.—Fig. 9, a sporangium-like structure from the upper surface of 
gametophyte from which was drawn fig. 8; two layers of cells outside the fertile region, 
the inner layer suggesting a tapetum; each layer consists of many cells; fig. 10, 
gram showing the relation of figs. 8 and 6 to one another and to the archegonial region. 
paring the figures, which are drawn to the same scale. Among all 
the antheridia examined from this material, there is no such differ 
in size, the antheridium shown in fig. 8 being a rather large one. 
