Ser. RnoposrerMEs. Fam. Cryptonemiacea. 
Prats CCLX XXIII. 
ACROPELTIS PHYLLOPHORA, Zoot. f.§ Harv. 
Gen. Cuar. Frond stipitate, flat, imperfectly midribbed below, dicho- 
tomo-pinnatifid, distichous or proliferous, composed of three strata ; 
the medullary of very slender, longitudinal, closely-packed filaments ; 
the intermediate of roundish-angular cells ; the cortical of minute, 
vertically seriated, coloured cells. Fructification : 1, simple, minute 
fuvelle, crowded in apical sori, containing, within a hyaline envelope, 
a mass of roundish spores; 2, shield-like memathecia, in the tips of 
the branches, containing cruciate tetraspores.—AcRopPELTIS (Mont.), 
from axpos, the summit, and wed, a small shield ; alluding to the 
shield-like terminal sori and nemathecia. 
Frons stipitata, plana, inferne obsolete costata, dichotomo-pinnatifida, disticha, 
v. prolifere ramosa, ex striatis tribus formata ; stratum medullare ex filis 
tenuissimis creberrimis longitudinalibus, intermedium cellulis rotundato-angu- 
latis, corticale cellulis minimis coloratis verticaliter seriatis constitutum. 
Fructus: 1 (in A. Phyllophora tantum observatus) favelle minime, simplices, 
soris terminalibus tmmerse, intra periderma hyalinum sporas minutas rotun- 
datas foventes; 2, nemathecia convexa, clypeiformia, infra apicem frondis 
evoluta, tetrasporas crucialim divisas foventia. 
Acropettis Phyllophora ; stem plano-compressed, ribbed, branched ; 
branches prolonged into broadly-flabelliform, many times dichoto- 
mous, fastigiate, rigidly membranaceous, basally costate fronds, fre- 
quently proliferous from the rib; segments linear-cuneate, patent ; 
axils rounded. 
A. Phyllophora ; caule plano-compresso costato ramoso ; ramis in frondes lato- 
flabelliformes pluries dichotomas fastigiatas pergamenas basi costatas, sepius e 
costa proliferas abeuntibus ; laciniis lineari-cuneatis patentibus ; axillis rotun 
datis. 
Acropettis Phyllophora, Hook. f. § Harv. in Hook. Lond. Journ. v. 6. p. 407. 
J. Ag. Sp. Aly. v. 2. p. 611. 
Ruopymenta Phyllophora, Harv. in Fl, Tas. v. 2. p: 319. 
Has. Port Arthur, Tasmania, Dr. Jeannerett. Seuth Port, C. Stuart. 
Rottnest Island, West Australia, VW. H. H. 
Geocr. Distr. West coast of Australia. Tasmania. 
Descr. Root a broad dise. Frond 6-12 inches high, and as much or more in 
the expansion of the segments. Stem 2-3 inches long, linear-cuneate, 1—3 
