296 FLORA OF TASMANIA. [Alge, by W. H. Harvey. 
Has. Georgetown; plentiful. 
DisrRiB. South coast of New Holland. 
Gen. XLIV. ACANTHOPHORA, Zz. 
(Lamour. Ess. p. 44. Grev. Syn. p. 54. Endl. 3rd Suppl. p. 47. Harv. Ner. Austr. p. 34. Kütz. 
Sp. Alg. p. 858.) 
l. Acanthophora Tasmanica (Sond.); fronde cartilaginea ultrasetacea decomposite ramosissima, 
ramis primariis elongatis lateraliter ramosis, secundariis brevibus ramulis brevibus plus minus onustis, 
spinulis minutis quaquaversis pinnatifido-dentatis solitariis v. aggregatis nunc spinula subulata indivisa 
fulcratis.—Sond. in Linn. xxv. p. 699. Polysiphonia, v. sp. ?, Harv. Alg. Austr. Exsice. No. 165. 
Has, Georgetown, between tide-marks, on the flats, R. Gunn, W. H. H., etc. 
Frond twice as thick as hog's-bristle, 6-8 inches long, much branched, the branches three to four times com- 
pounded in an alternate manner, spreading to all sides. Main branches 3-4 inches long, nearly bare below, in 
the upper part set with one or two series of short, simple, or little-divided branchlets. All the younger branches 
and ramuli are closely beset with patent spinulee, half a line in length, spirally inserted, very patent and sharply 
inciso-dentate or pinnatifid. Colour a dark brown. Substance cartilaginous, rather soft, adhering to paper. 
2. Acanthophora arborea (Harv.) ; fronde dendroidea incrassata decomposite ramosissima, ramis 
primariis elongatis versus apicem attenuatis lateraliter ramosissimis, ramis secundariis brevibus dichotomo- 
multifidis, ramulis brevissimis spinulosis, spinulis subulatis fasciculatis undique insertis imbricatis, cera- 
midiis subterminalibus pedunculatis ovatis.—A. Tasmanica, Harv. Alg. Austr. Besicc. n. 140 (not of 
Sonder). 
Has. Rocks: at low water-mark, in the Tamar, above Georgetown, W. H. H. 
Fronds 12-18 inches long, as thick as erowquill below, attenuated upwards, branched from a short way above 
the base, bushy and tree-like. Principal branches few, subsimple, resembling the main stem, and equal in thickness, 
erecto-patent, more or less clothed with lesser branches. The secondary branches are 1-2 inches long, slender as 
hog's-bristle, and much divided in an irregularly dichotomo-alternate manner, the ultimate ramuli being not more 
than two or three lines long. All the lesser divisions and ramuli are closely set with imbricated subulate spines 
directed to all sides. Capsules ovate, on longish stalks, near or at the end of the branches. Colour dark brownish- 
purple when fresh, black when dry. : 
Gen. XLV. RHODOMELA, Ag. 
(Ag. Sp. Alg. i. p. 368. Grey. Syn. p. 51. Endl. 3rd Suppl. p. 47. Harv, Ner. Austr. p. 34.) 
l. Rhodomela periclados (Sond.); caspitosa, fronde subsimpliei v. furcata, ramis paucis late- 
ralibus simplicibus, ramulis aculeiformibus acutis brevibus demum fasciculato-multifidis undique insertis, 
eystocarpiis subglobosis sessilibus v. brevissime pedicellatis, tetrasporis in ramulis fasciculatis ultimis 
nidulantibus.—Harv, Phyc. Austr. t. 28. R. simpliciuscula, Harv. Alg. Austr. Eesice. n. 136. 
Has, East coast, and Brown's River, A. Guan. Southport, C. Stuart. 
DisrRrB. Port Phillip, Victoria, Mueller, W. H. H. 
Densely tufted. Fronds issuing from matted roots, 2-4 inches high, simple or once or twice forked, and oc- 
casionally furnished with one or two lateral simple branches. Branches sometimes nearly naked, but in well-grown 
specimens furnished through the whole length with spinelike ramuli, 1-2 lines long, which are at first subsimple, 
but afterwards, by development from their inner side, become fasciculato-multifid. Colour very dark brown, black 
when dry. Substance rather rigid, not strongly adhering to paper in drying. Cystocarps (on the Port Phillip spe- 
