326 FLORA OF TASMANIA. [4lge, by W. H. Harvey. 
form. The substance is firmly cartilaginous, and the plant very imperfectly adheres to paper. Colour a livid 
brownish-purple.—The imperfect specimens referred to @. acicularis in Hook. Lond. Journ. vi. p. 407, probably 
belong to this species, which is most nearly related to G. Teedii. 
7. Gigartina? lanceolata (Harv.); fronde e stipite brevi vix canaliculato oriente plana carnosa 
lanceolata v. obovata simplici v. in frondes plures consimiles partita, margine nuda v. sepius plus minus 
pinnato-ciliata, ciliis subulatis horizontalibus. 
Has. Georgetown, Gunn. 
The specimens are not mature, and without fruit. It is possible, therefore, either that our plant may be an 
Iridea, or some form of the protean.@. radula. The fronds are about 6 inches long, an inch or inch and half in 
width, tapering much to the base, and either obtuse or acute at the apex. The margin in many is copiously fur- 
nished with horizontal fringing processes 2 or 3 lines long, and about 4 line in breadth: other specimens are 
quite bare. We have seen one or two instances of cilia rising from the disc, showing affinity with G. radula. The 
structure of the frond is that of Gigartina. 
Gen. XCVII. IRIDMA, Bory. 
(Bory, Coq. p. 103 (excl. sp.). J. Ag. Sp. Alg. ii. p. 250. Harv. Ner. Bor. Amer. ii. p. 178.) 
1. Iridzea micans? (Bory, Coq. p. 110. t. 13 et 13 bis. J. Ag. Sp. Ale ii. p. 254). 
Has. Sandy Cove, Dr. Zyall. 
Disrris. Falkland Islands. Chili. Cape Horn. New Zealand. 
Imperfect scraps, possibly referable to this species. 
2. Irideea foliifera (Harv.) ; fronde fusco-rubra membranacea ovata v. ovato-lanceolata basi cuneata 
et in stipitem attenuata a margine foliifera, foliolis lanceolatis subpetiolatis, soris tetrasporarum puncti- 
formibus per totam frondem sparsis. 
Haz. Georgetown, Gunn. 
I am exceedingly unwilling to propose a new species in this troublesome genus, particularly on imperfect spe- 
cimens, yet 1 can hardly overlook the present plant altogether, and I know not any species of Jridea with which 
it can be associated. In habit it so much resembles some specimens of Rhodymenia polymorpha that, without testing 
it microscopically, it might easily be passed over for that species. The colour is a rather full red, somewhat 
brownish or purplish; the surface, when dry, slightly lustrous. The outline of the frond, as in all the genus, is 
very variable, its most striking peculiarity being the marginal leafy lobes. Sori very numerous, immersed in the 
substance.— We possess fragmentary speciînens of other Tasmanian Iridee, too imperfect for description. 
3. Irideea polycarpa (Harv.); fronde intense rubra longissima laneeolata v. ovato-lanceolata 
simplici integerrima, margine incrassato, basi cuneata et in stipitem filiformem tenuem vix canaliculatum 
attenuata, cystocarpiis numerosissimis per totam frondem sparsis. 
Has. Tasmania, C. Stuart, 
: Perhaps ss yd be the cystocarpic state of the preceding, but our numerous specimens are all guite simple, 
withont lateral foliations. The colour is a deep blood-red. The substance is thin, much thinner than in J. lamina- 
rioides, to which the frond approaches in form. The cystocarps are of large size, and very densely scattered over 
the surface ; they are nearly spherical, and prominent on both surfaces of the frond. The frond is from 1-3 feet 
ın length, and from 14-6 inches in width. 
Gen. XCVIII. EPYMENIA, Kütz. 
(Kütz. Sp. Alg. p. 787. J. Ag. Sp. Alg. ii. p. 219.) 
1. Epymenia membranacea (Harv.); fronde stipitata flabellatim expansa repetite dichotema 
