bnmcLes elegantly flexuous tliroughout, aud 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. coccinetm, the ordinary form of which species is common on the_ coast.
2. Plocamixim angustum (J. Ag. ; Harv. Ner. Austr. p. 122; Kütz. Sp. Alg. p. S85 ; J . Ag. Sp.
Alg. ii. p. 402).
H ab. Sea-shores, common.
D ist iu b. Australia and New Zeaiaud.
3. Plocamium costatum (J. Ag. ; Ilarv. Ner. Austr. p. 1 2 2 ; Kütz. Sp. Alg. p. 8 8 6 ; J. Ag. Sp.
Alg. ii. p. 403).
H ab. Mouth of the Tamar.
D ist r ib . Australia and New Zealand.
4. Plocamium procerum (J. Ag.; Harv. Ner. Austr. p. 122; Kütz. Sp. Alg. 8 8 6 ; J. Ag. Sp.
Alg. ii. p. 400).
H ab. Georgetown and Port Arthur.
Dist r ib . Australia.
Gen. LXXXI. HYMENOCLADIA, J. Ag.
{J. Ag. Sp. Alg. Ü. p: 772.)
1. H ymen oclad ia U sn e a (J. Ag. Sp. Alg. ii. p. 772).—Pucus Usnea, Br. in Turn. Eist. t. 225.
H ab. Kent Island, U. Brown. Flinders’ Island, Milligan.
D ist r ib . South shores of Australia.
Gen. LXXXII. IlHODOPHYLLIS, Kütz.
(Kütz. Sp. Alg. p. 786. J. Ag. Sp. Alg. ii. p. 387.—Stictophgllum, Kütz.)
1. Rh odop b yllis Gunnii (Harv. in Fl. N. Zeal. ii. p. 247).—Cladhymenia? Gunnii, Earo. Lond.
Journ. Bot. iv. yj. 5 4 0 ; User. Austr. p . 87. t. 32.—Callophyllis Gunnii, Kiitz. Sp. Alg. p . 746. Euthora
Qü.'ü-ûW, J. Ag. Sp. Alg. ii.p . 388.
H ab. Abuudant a t Georgetown.
Dist r ib. New Holland aud New Zealand.
2. Rh odop h y llis membranacea (Harv. in Fl. N. Zeal. ii. p. 2 4 7 .1 .117).—Halymenia? membranacea,
Harv. Lond. Journ. Bot. iv. p . 448. Rhodymenia membranacea, Earv. I.e. vi.yj. 405. Sticto-
phyllum membranaceum, Kütz. Sp. Alg. p . 874. Euthora membranacea, •]. Ag. Sp. Alg. ii.y?. 385. Rho-
dymenia fimbriata, Eooh. fil. et Harv. in Lond. Journ. Bot. vi.y?. 405.
H a b. Georgetown, abundant.
Dist r ib. New Holland and New Zealand.
A very variable species, to which we now reduce our R. fimbriata, 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, whieh, if seen in isolated specimens, would pass for so many species. Sometimes the fiuiid is not more
than a line wide, and very much divided ; sometimes it is nearly an inch in breadth, and but httle branched. Some
of the wider fonns approach R. Gunnii, but are to be distinguished by the more ragged habit, and the ciliiferous or
foliiferous margin, and acute points of all the lesser segments, etc.
3. Rhodophyllis mu ltipar tita (Harv.) ; fronde membranacea lineari decomposite dichotoma vix
fastigiata, axillis rotundatis, ramis patentibus dichotomo-multifidis, minoribus subalterne furcatis, margine
integerrimo, apicibus angustatis subacutis, cystocarpiis marginalibus, tetrasporis in segmentis ultimis dis-
persis.— Earv. Alg. Exsie. n. 370.
H a b . Port Arthur, Lyall, JF. E . E . East coast, E . Gunn. Southport, C. Sluart.
D is t r ib . Port Fairy, Yictoria.
Fi-ond 12 inches or more in length, and as much hi the expansion of the branches, membranaceous, 1-2 lines
in breadth in most of the branches and lesser divisions, excessively divided in a partly pinnated, partly dichotomous
manner. The order of branching is primarüy dichotomous, but by frequent suppression of one of the furcations the
branches appear pinnated, with dichotomo-midtifid lesser branches. All the axils are remarkably rounded. The
frond in most places preserves a uniform breadth, but in some specimens it is twice as broad as in others. The
margin is always free from lobes or cüia, and quite entire and flat. The apices are not remarkably acute. The
colour is a very fuU, deep dark-red. Oystocarps are borne plentifully on the margin of the smaller laciniæ, and
tetraspores scattered through the substance of the ultimate divisions. The habit is not unlike that of some narrow
specimens of Gracilaria multipartita.
Gen. LXX XIII. STENOGEAMME, Rarv.
(Harv. Beech. Voy. p. 408. Phyc. Brit. t. 157. Kütz. Sp. Alg. p. 873. J. Ag. Sp. Alg. ii. p. 390.)
1. S t e n o g r a m m e i n t e r r u p t a (Mont.; Harv. Phyc. Brit. t. 157 ; Kiitz. Sp. Alg. p. 8 7 3 ; J . Ag.
Sp. Alg. ii. p. 391).—S. Californica, Earv. in Beeckey,p. 409. Delesseria interrupta, Ag. Syst. p. 250.
H a b . Georgetown, not commou.
D i s t r ib . New Zealand, Spain, south of England and Ireland, Keys of Florida, and California.
Gen. LXXXIV. RHODYMENU, Grev.
(Grev. Alg, Brit. p. 84. J. Ag. Sp. Alg. ii. p. 375.)
1. R K o d y m e n ia c o r a l l i n a (Grev.; J . Ag. Sp. Alg. ii. p. 379).—Sphmrococcus corallinus, Bory,
Foy. Coq.p. 175. t. 16.
H a b . Georgetown, B . Gunn.
D is t r ib . New Zealand, and west coast of South America.
2. R h o d y m e n i a (A c r o p e l t i s ) p h y l l o p h o r a (Hook. fil. et Harv. in Lond. Journ. Bot. vi. p. 407).
H a b . Port Arthur, Jeannerett. Tasmania, C. Stuart.
3. R h o d y m e n i a p o l y m o r p h a (Harv.) ; stipite brevi mox in basi frondis expiauato, fronde dilute
rubra latissima oblongo-ovata polymorpha nunc subsimplici margiue foliifera, nunc in lacinias plures lan-
ceolatas fissa, laciniis nunc simplicibus nunc margine foliiferis v. varie inciso-partitis, cystocarpiis numerosissimis
per totam frondem dispersis.— Earv. Alg. Exsic. ii. 383.
H a b . Georgetown.
D i s t iu b . New Holland.
Frond 1 ov 2 feet long, its divisions 2-4 inches wide, membranaceous, verj'variable in form and division.
Sometimes the frond is broadly ovate, and eitlier simple or but once cleft ; sometimes it is divided into numerous
lanceolate segments, or the principal segments throw off marginal lobes. The margin is frequently erose, aud the
membrane in age pierced with irregular holes. The colour varies from a dull purplish-red to a pale browuish-red.
Conceptacles are veiy numerous, promiiieut, and scattered on the whole surface.—It is nearly allied to R. sanguinea
of New Zealand, and to R. pertma of Western North America. The habit of some specimens is that of an Irideea.
4. R h o d y m e n i a c u n e a t a (Harv.) ; stipite brevi mox iu basi frondis desinente, fronde lato-cuneata