318 FLORA OF TASMANIA. [Alge, by W. H. Harvey. 
branches elegantly flexuous throughout, and closely fringed with very slender, pectinate ramuli. No fruit has been 
seen. The aspect of this variety is very peculiar, but we can detect no character sufficient to distinguish it from 
P. coccineum, the ordinary form of which species is common on the coast. 
2. Plocamium angustum (J. Ag.; Harv. Ner. Austr. p. 122; Kütz. Sp. Alg. p. 885; J. Ag. Sp. 
Alg. ii. p. 402). 
Has. Sea-shores, common. : 
Disrris. Australia and New Zealand. 
3. Plocamium costatum (J. Ag.; Harv. Ner. Austr. p. 122; Kütz. Sp. Alg. p. 886; J. Ag. Sp. 
Alg. ii. p. 403). 
Has. Mouth of the Tamar. 
DisrarB. Australia and New Zealand. 
4. Plocamium procerum (J. Ag.; Harv. Ner. Austr. p. 122; Kútz. Sp. Alg. 886; J. Ag. Sp. 
Alg. ii. p. 400). 
Has. Georgetown and Port Arthur. 
Disrris. Australia. 
Gen. LXXXI, HYMENOCLADIA, J. 45. 
(J; Ag. Sp. Alg. ii. p. 772.) 
l. Hymenocladia Usnea (J. Ag. Sp. Alg. ii. p. 772).—Fucus Usnea, Br. in Turn. Hist. t. 225. 
Has. Kent Island, R. Brown. Flinders’ Island, Milligan. 
Disrrib. South shores of Australia. 
Gen. LXXXII. RHODOPHYLLIS, Kütz. 
(Kütz. Sp. Alg. p. 786. J. Ag. Sp. Alg. ii. p. 387.—Stictophyllum, Kütz.) 
l. Rhodophyllis Gunnii (Harv. in Fl. N. Zeal. ii. p. 247).—Cladhymenia? Gunnii, Harv. Lond. 
Journ. Bot. iv. p. 540 ; Ner. Austr. p. 81. t. 92.—Callophyllis Gunnii, Kiitz. Sp. Alg. p. 746. Euthora 
Gunnii, J. Ag. Sp. Alg. ii. p. 386. 
Has. Abundant at Georgetown. 
DrsrarB. New Holland and New Zealand. 
2. Rhodophyllis membranacea (Harv. in Fl. N. Zeal. ii. p. 247. t. 117).—Halymenia ? membra- 
nacea, Haro. Lond. Journ. Bot. iv. p. 448. Rhodymenia membranacea, Harv. 1. e. vi. p. 405. — Sticto- 
phyllum membranaceum, Kütz, Sp. Aig. p. 814. Euthora membranacea, J. Ag. Sp. Alg. ii. p. 385. Rho- 
dymenia fimbriata, Hook. Jil. et Harv. in Lond. Journ. Bot. vi. p. 405. 
Has. Georgetown, abundant. 
Disrris. New Holland and New Zealand. 
À very variable species, to which we now reduce our R. Jimbriata, founded on a very broad, delicately fringed 
form, extremely different in aspect from the ordinary form, as figured in the Flora of New Zealand. Having had 
the opportunity of collecting this plant abundantly in its various localities, we have succeeded in uniting together 
many forms, which, if seen in isolated specimens, would pass for so many species. Sometimes the frond is not more 
than a line wide, and very much divided; sometimes it is nearly an inch in breadth, and but little branched. Some 
of the wider forms approach R, Gunnii, but are to be distinguished by the more ragged habit, and the eilüferous or 
foliiferous margin, and acute points of all the lesser segments, ete. 
3. Rhodophyllis multipartita (Harv.); fronde membranacea lineari decomposite dichotoma vix 
