140 
RECORDS OF THE AUSTRALIAN MUSEUM. 
(not figured) exhibits the tissue pillars extending completely across 
the frond from surface to surface, without the intervention of the 
space just referred to. There are no clear vacuities between the 
tissue-pillars, but their place is taken by patches of dark brown 
pulverulent material, as if filling up such hollows. In PL xxvii., 
fig. 14, we see a section taken horizontally through the leaf, im- 
mediately below the surface, exposing the mid rib, veins, and 
epidermal tissue between the latter, as well as very dark brown 
round patches between the veins, which occupy the same relative 
position as the dark spots in PL xxvii., fig. 15. 
There is evidence of fructification only in the microsections of 
the fronds, although when the undersides of the latter are visible, 
and disintegration has taken place, an appearance very similar to 
fructification presents itself, but that is all. This is due simply 
to the veinules passing over the revolute margins. 
In PL xxvii., fig. 16, however, are probably the remains of sori, 
consisting of a number of filaments clustered under the revolute 
margins, which remind one of pedicels for the support of sporangia, 
and attached to one of these on the right-hand side of the frond 
is a small ovate body that may be a sporangium (PL xxvi., fig. 7), 
very similar to the arrangement of the fructification in Pterin* 
There is no trace of an indusium. The length of the revolute 
portion of the frond is 03 mm., width of the receptacles contain- 
ing the pedicels OT mm., its depth 0 06 mm., and the length of 
the pedicle OT mm. 
When first this Fern came under my notice, I took the fronds 
to be attached in a verticillate manner. I now look upon them 
as forming small tufts arranged in ordinary close spirals. The 
structure shown in PL xxvi., fig, 6, showing that the fronds were 
not arranged in a verticil on the same plane, but in a spiral manner, 
is emphasised by the fact that in PL xxiv., figs. 2 and 4, and par- 
ticularly in the last, some of the fronds appear protruding from 
below the others. This is specially the case in PL xxiv., fig. 4, 
where the dark shade running across the matrix, indicates a piece 
removed, displaying a lower level than that to the left of the 
shading ; on the former are two fronds. 
The Scales . — More or less pyriform bodies are visible associated 
with the fronds in PL xxv., fig. 5, and PL xxvi., fig, 6 ; these I 
have tentatively termed “scales.” Mr. A. 0. Seward, to whom 
I submitted photographic copies of the present plates, has been 
good enough to suggest that these may be bulbil-like appendages, 
or scale-leaves. He remarks that bulbils occur in some recent 
ferns, such as Cystopteris bulbifera. A dimorphic condition of 
the fronds has been shown to exist in Glossopteris browniana , 
* See Hooker and Baker's Synop. Filicium., 1868, pi. iii., fig. 31. 
