THE NATURALIST, 1907. Pirate VII. 
ea 
iM 
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Bonoae 
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Fig. 6.—Frullania dilatata. 
A, a perigonial leaf (male bract), from ventral surface, showing two antheridia; B. C, 
antheridium in apical view and in longitudinal section; D, longitudinal section of perianth 
with two archegonia; E£, transverse section of same; F, longitudinal section of perianth 
showing embryo in fertilised archegonium, with unfertilised archegonium on the right; 
G, a series of longitudinal, and H,a series of transverse, sections of embryos of different 
ages; 1, J, K, L, longitudinal sections of older sporogonia, to show development of spores 
and elaters. 
