Anacrogynotis J ungerm a nniales . 20 r 
structure of the male branch in the four genera, reaching its limits 
in Umbraculum. 
In Aneura and Metzgeria the female branches are very much 
CAL J 
LNV._ 
PER.-. 
Fig. 31. Umbraculum (Hymenophytum) flabellatum. rj, Part of a male plant, 
from below, showing the anthefidial brandies (diagrammatic) ; II, Cross 
section of a male plant, showing the antheridia ; III, Part of a jfemale plant, 
with archegonial branches and a sporogonium ; IV, Longitudinal section of an 
archegoniai branch with a nearly ripe sporogonium ; V, Similar section of a 
branch with unfertilised archegonia. cal ., calyptra ; inv., involucre pev. y 
perianth. 
