comes riddled with roundish holes, after the manner of Kallymenia cribrosa. 
The conceptacles are about the size of poppy-seed, dark-coloured, and plen- 
tifully sprinkled over the whole surface of the frond. The sori of tetra- 
spores are very minute, dot-like, thickly dispersed over the whole surface 
of the segments, especially the upper ones. ‘The colour, when recent, is a 
rather dull pinky-red; when dry it becomes brownish-red or brown. ‘The 
substance, though thin and membranous, is somewhat rigid, long resisting 
the action of fresh water; and in drying the mature frond adheres but im- 
perfectly to paper. 
eet 
The figure of this plant, given in Ner. Austr. t. 47, though 
correct in outline, is very falsely coloured, having been copied 
from a badly-preserved and discoloured specimen, “ restored, ’ 
or rather caricatured, by the colourer. I therefore gladly avail 
myself of the present opportunity to give a more faithful repre- 
sentation of a really fine species. In its broad and little divided 
fronds, and the rigid substance, it differs from most of the other 
Australian species; nor has it any very near ally among exotic 
Nitophylla. Among the Australian it comes next to JV. afine 
and WV. Curdieanum, both of which have a very different habit. 
Old specimens are very apt to be perforated, and are some- 
times completely riddled with round holes. JI am not certain 
whether these perforations are caused by marine worms, or by 
natural and unequal decay. 
Fig. 1. NrropHyttum GunnianuM,—the natural size. 2. Section through a 
eystocarp and the frond. 5. String of spores from the same. 4. Small 
portion of the surface and of the erose margin :—magnified. 
