THE FERN WORLD OF AUSTRALIA. 
27 
T. barlbara, T. Moore. Trunk erect, very thick, from one to six 
feet higli. Frond varying in length from two to eight feet, narrow, 
stipes slightly angular, naked or at times clothed with brown scales, 
twice pinnate. Pinnae numerous from a few inches to a foot long. 
Pinnules of a firm consistence narrow-lanceolate close one to two 
inches long, the edge more or less distinctly toothed, the upper ones 
decurrent and confluent at the base. Sori on the oblique simple or 
forked veinlets usually covering the greater part of the under surface 
of the lower pinnules of the lower pinnge, the rest ot the frond 
barren. Found in swamps or wet places from Rockingham Bay to 
Moreton Bay in Queensland, also throughout N. S. Wales, Victoria 
and Tasmania. 
T. Fraseri, Hook, et Grev. Trunk or rhizome erect thick. Fronds 
one to three feet long, twice pinnate. Pinnules lanceolate, dark 
green and of a thin membranous texture like that of the pellucid 
species of New Zealand, half to one inch long, deeply serrated. 
Spore-cases small and few at the base of the midrib and of a few 
of the lateral veins of the lower pinnules. This species is confined 
to the deep gullies of the mountains of N. S. Wales, 
T. Moorei, Baker. Trunk one to one and a half feet high, six 
inches diameter. Fronds often four feet long twice pinnate. 
Pinnules lanceolate of a thin membranous consistence as the last. 
Spore-cases few and small as in T, Fraseri. So far as at present 
known this species is confined to Lord Howe's Island. 
Tribe IV. — Hymenophylle^e. Fronds of a thin membranous 
consistence mostly pellucid on usually a creeping rhizome. Spore- 
cases depressed, with a transverse ring, sessile or nearly so on a 
columnar receptacle arising from the base of a cup-shaped or deeply 
two-valved indusium, embedded in or protruding from the margins 
of the fronds, and of a consistence nearly similar. 
XII. — Trichomanes, Linn. Bristle Fern. 
Rhizome creeping, slender, or thick and short, fronds usually 
small delicate half pellucid, entire or variously divided and veined. 
Sori terminal or lateral. Indusium (frequently called involucre) of 
the texture of the frond and continuous with it, tubular or funnel- 
shaped, entire at the mouth or two lipped, sunk in the margin of the 
frond, or protruding from it. The receptacle a filiform exserted 
vein, the spore-cases sessile at its base. Name of uncertain 
application. 
T. peltatum, Baker. Rhizome filiform intricate adhering close 
to the bark of trees by minute adventitious rootlets. Fronds 
sessile, orbicular half to one inch broad, attached at or near the 
centre, overlapping each other and closely appressed entire or 
broadly lobed, texture very thin and glittering. Veins numerous, free 
or forked, radiating from the spot where it is attached to the 
rhizome. Sori few. Indusium tubular more or less embedded in 
the fronds margin, the mouth sometimes two-lipped, the receptacle 
