raiuis aiqiiüougis curmtis, ramiüis altemis siibiüatis furcatis v. alterno multilîclis, nvillis acutis, stictis
• l- t - V. pluriseriatis. Bosfri cliia fastigiata, n o lk in Lond. Jo um . Boi. voi. iv. p. 209.
H a e . Hermito Islaud, Cape H o n i ; on stones near liigli-water mark.
Bmiììa, deuse fastigiata. Frondes ime. long», e basi in ramos pliuimos primarios divisai, rubi'O-pui'pm'cai.
Cmlis brerissimus. Rami elongati, cmvati, apicibus arcte incurrís, raimiUs simpbcibus midtifidisve ornati chartæ
laxe adhæret.
Possibly only a variety of the preceding ; from wldch, however, it differs conspicuously iu the very abbreviated
stem, the consequently louger, more divided branches mid the didler coloim.
S. St ictosiphonia mga. Hook. fil. et Harv. ; caubbus fle.xuosis vage dicbotome ramosis, rainis paucis
iiudis simpbcibus fibformibus subcapiflaribus arcuatis medio incrassatis apicibus incurvis, ramulis nullis,
mdlbs patentibus, stictis miuutis multiseriatis, sticliidns longissime pedunculatis lanceolatis acutis. Bos-
trycbia vaga, m b k iu Lond. Jonrn. B o t. vol. iv. p. 270. (Tap. CLXXXVI. K g . I.)
H a b . Cbristmas Harbour, Kergudeu’s L a n d ; on rocks and stones above liigb-water mark, and in
damp places at a considerable distance from the sea ; abundant.
Dense cæspitosa. fibs intertextis quasi crinita. Frondes R-Ì. nnc. longæ, flexuosæ, m-egidaiiter ramosæ. capü-
lares. Sticta parvæ, 6-S-seriatæ. Suhstantia rigida. a io r luride purpureus chartæ laxe adlioeret.
A remarkably distmct bttle species, of very simple structure. It is abimdant in Kerguelen’s Land, sometimes
inhabiting places some hundreds of feet above the sea, but probably always within reach of the spray.
P late CLXXXVI. Fig. I.—Plant of the natural size ; 3, rami of ditto ; 3, portion of ditto ; 4, incrassated
ramulus ; 5, ramulus and stichidium ; 6. tetraspores :—all magmjied.
28. LA U S EN IA , Lmnx.
1. iNTRESCizpinnatijida, Lamx. Var. y. angustata. Hook. ; Fl. Antarct. P t. 1. p. 184.
H a b . Berkdey Sound, Falkland Islands ; abundant on the beacb.
One of the most widely dispersed of the Alga, inhabiting the shores of Em-ope from Norway to the Mediterranean
; the Canary Islands ; west coast of .-Urica, and Cape of Good Hope ; the Peninsula of India ; Australia
and New Zealand ; fee Pacific Islands, and both coasts of North and South America. This very extended range
has. however, its bmits ; the plant is neither found so far north as Iceland in the Arctic Sea, nor in the south i s l
known to inhabit Cape Horn or Kerguelen’s Land.
29. DELISEA, Mont.
1 . Dr u s z z xMlehra, Mont. in Arm. Se. N a t. Ser. bi. vol. i. p. 158. Bowiesia puldira, Grev. Sgnops. Alg.
p. 57. Bonnemaisonia elegans, Endl. Suppl. vol. ib. p. 44. Calodadia pulchra, Grev. Herb. Sphærococcus
flaccidos, Suhr. {fid. M o n t)
H a b . Chiistmas Harbour, Kerguelen’s Land ; common.
Magnificent specimens of this nohle Alga were coUeeted by the Antarctic Expedition, though only in Kerguelen’s
Land. The prerionsly assigned habitat for the species is New HoUand or Tasmania ; but we have seen no other
specimens than Mr. Fraser’s original one, labeUed as from that quarter of the world. It therefore appears to us
probable, that the specimen sent by Mr. Fraser, may have been coUected in Mc’ttnarrie's Island ; whence other
-Uitarctie plants were brought to that gentleman in Sydney, some of which have since found tlieir way into our
Herbaria as of Aostralian origin.
F LO llA A NTAECTICA,
30. lE ID Æ A , Borg.
1. I 1HDÆA R adula, B o ry ; El. Antarct. P t 1. p. 188.
H a e . Hermite Island, Cape Ho rn ; Falkland Islands and Kerguelen’s Land, very abnndant. Cock-
b um Is la n d ; a t tlio limits of southem vegetation, on th e beach, rare and bleached.
So abnndant ave the IrAea in the South Polar Ocean, and so variable in their form and textare, that we can
scarcely hope to araive at any accurate knowledge of the species untU they shaU have been studied in a bving state ;
and then it is not improbable that the genus will be considerably reduced ; and one or two of tbe more common
species be found to assume foi-ms as dissimUar as those of our LaurmcA pinnatiJAa.
There exist in the Hookerian Herbarium, authentic specimens of the Fucus bracteatus of GmeUn, as figured
in Turner’s ‘ Historia,’ coUected both at the Cape of Good Hope and in North West America, by Mr. Xlenzies.
These are (as is generally the case ta th the specimens of the larger Fuci, preserved in our Herbaria) smaUer and of
that lanceolate form which other Iridea present in a young state. Their texture is very- thick, densely cartilaginous,
opaque; and covered with tubercles whicb faU away, leaving a cribriform frond both when immature and
fflder. ’ This great density is a very remarkable character, and observable in the plant here referred fo that species,
which, when fidl grown, becomes broadly ovate, or orbicular, and cordate 01 rounded, or narrowed at the base ;
with the lamina more or less and variously divided, sometimes three feet broad, or upwards. The largest specimens
we have never seen attached, though they are abundant, washed up on the beach, and probably attam their
great size on tlie outer rocks.
Since the publication of the first part of this work, we have, throngh Dr. Montagne’s Idndness, had the oppor-
timity of inspecting the I. laminarioides, Bory, of Lord Auckland’s Group ; specimens of which are in our Herbarium
from the same island ; but which we had previously regarded as a more deUcate state of I. Radula. Even what we
consider the true I. Radula of Lord Auckland’s Group and Kerguelen’s Land, is not so dense in the frond as the
s p e c im e n s of the Ealkland Islands and Cape of Good Hopeare. Both this and the foUowmg species have the
surface frequently covered with granules, tubercles or pedicellate pear-shaped organs ; or in the ymmg state with
elongated fleshy bodies similar to those of the I. stiriata, Bory-. The I . stiriata, according to the descriptions, may
belong to a state of this, or the following, or many other forms of the genus : it is. however, a narrower, smaller
species, with a much more dense frond than even I. Radula.
2. I r idæ a cordata, Bory, in Dnperreg Vog. Bo t. p. 104 ; et I.m ican s, p. 110. 1 .13 et 13 b k . Halymenia
cordata, Agardh, Sp. Alg. p. 201. Fucus cordatas. Turner H is t. Fuc. t. 116.
Var. ft. ciliolata ; stipite brevi cartilagineo cuncato ciliato-dentato mox in frondem simplicem ovato-
laiiceolatam desinente, fronde latissima basi cuneata v. cordata apice obtusa v. acuta v. emargmato-bifida
membranacea rubra plana nitente lævi margine vix undulata. Nobis in Lond. -Journ. Bo t. vol. iv. p. 263.
Var. y. dichotoma ; stipite brevi mox cuneato furcato v. pluries dicbotomo sensim in frondem late
cuneatam obovatamve desinente, segmeutis integris vel divisis margine dentatis lobatis proliferisve.
H a b . Hermite Island, Cape Horn, and the Falkland Islan d s; b oth varieties very abmidant.
This species, when fresh. wcU deserves the briUiant description of its beautiful tints, given by M. Bory
on the authority of Admiral D’UrviUe and M. Gaudichaud. It is one of the most common Alga of the
southern extremity of America and the Ealklands. In its younger state, the fronds are obovate or spathidate, like
those of J. (««¿Mnoides, figured by Bory, and soon expand into laminæ, variously modified, according to situation
and exposure, with relation to the force of the sea, the natm-e of the bottom, the currents, depth, and protection
afforded by other Alga -, for no two fronds of a siinUar shape ai-e iisuaUy to be found nfithm a few yards. Indeed,
5 U