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Fronds simple, pinnatifid or pinnate. 
Veins copiously anastomosing with free 
included veinlets. 
Genus XL.—Pleopeltis H. and B. 168 
Trispe XI.—GRAMMITIDEX 
Sori on the back of the lobes, more 
than twice as long as broad, usually 
linear. 
Sori arising from the veins over the 
under-surface of the frond, linear and 
usually forked. Habit and mode of 
growth of Chezlanthes. 
Genus XLI.—Gymaogramme Desv. 175 
Veins simple, forming an acute angle 
with the midrib and having their apices 
prolonged into a transverse marginal vein 
which eventually becomes the receptacle. 
Sori situated in a longitudinal slit of the 
margin. Fronds simple, linear, grass-like, 
Geaus XLII.—Vittaria Sm. 177 
Veins reticulated and wholly covered 
by sporangia, the sori being in fact reticu- . 
lated. Fronds either simple, pinnatifid or 
pinnate. Genus XLIII—Hemionites L. 178: 
