aséi <! '
■;R
I L ,
30. RrfVLLLfy Harv.
1. B.illia Bnmonis, Harv., in Hook. Journ. o f Bot. vol. ii. p. 1 9 1 . Sphacelaria calHtriclia, Agardh
le . Aïg. Euroj). t. 6 . BaUia caRitriclia, Mont. Yog. au Bole Sud, Bo t. Ctypt. p. 94.
Var. j3, Hombroniana. B. Hombroniana, Mont. Prodr. Phyc. Antarct. p. 9. Yoy. au Pole Sud, Bot.
Crypt. p. 95. 1 .12. f. 1.
H ab. Lord Auckland’s group and Campbell’s Is lan d ; on tlie roots and stems of large rfZ/ig, abundant.
Caidis in exemplaribus Aucklandicis 2 imc. altus, seta porcina duplo crassior, hirtus, vage ramosus, di-trichoto-
mus ; ramis primariis apice flabellatim ramidosis, cii'cumscriptione rotundatis, fastigiatis, 3-5 lobatis. Raimdi bi-tri-
pinuati, pimiulis subremotis acutis. Articuli pinnai'um diametro duplo vix triplo longiores, ovato-oblongi, rarius
cylindracei, apice angustati, pinnularum sesqui-longiores, ovati. Substaiddi rigida, cornea. Color piu*pm-eo-roscus.
The Auckland’s group specimens appear to belong chiefly to the B. Hombroniana of Montagne, a native of
Akaroa*, on the middle island of New Zealand; they differ fi-om those of Tasmania and the Falklands in being
shorter and of a denser habit, in having longer articulations to the pinnæ aud pimiulæ, and in the latter being generally
only twice pinnated, with the ultimate pinnules separated and remote, like the teeth of a comb. Kerguelen’s
Land individuals connect these forms. We have examined several hundreds of specimens, from seven or eight different
localities in the Antarctic Ocean, without being able to trace any constant specific distinction amongst them ;
the same individual often beai-s both bipinnate and tripinnate fi-onds, with the segments remote or approximated ;
the length of the articulations and theii* foi-m, and the outUne of the branches from broadly ovate to linear-lanceolate
ai-e equally vai-iable characters. We can, however, weR understand Montague’s di-awing a different conclusion
from an examination of but few specimens of the extremes.
31. PTILOTA, Agardh.
1. P tilota formosiesima, Mont., caule ancipiti compresse costa articulata percm-so vage ramoso decomposite
piuuato, piuuis valde iuæquabbus pinnubsque alternis patentibus ultimis serratis, favelbs sessibbus,
involucri fobis pinnatifidis, spbærosporiis margiuabbus pedicellatis. P t. formosissima, Mont. Prodr. Phyc.
An t. p. 8. Voy. au Pole Sud, Bo t. Crypt, p. 98. t. 9. f. 3. (T a b . LX X V II.)
H a b . Lord Auckland’s group ; abundant.
Radix cabus exiguus. Frondes aggi-egatæ, 6-10 une. longæ, 4-6 latæ, flabelliformes. Caulis {jugarnentum
Ag.) basi teres, mox plano-compressus, linearis v. utrinque subattenuatus, F ~ 1 t bn. latus, distiche ramosissimus.
Finnæ F une. longæ, alternæ, piimatæ v. bipinnatæ ; pinnubs brevibus, altemis, patentibus, serratis v. pectinatis, apice
subacutis. Favelloe sessiles, involucro quadrifobato pectinato cinctæ, sphæricæ, sporis minutis angulatis farctæ.
Sphærosporæ marginales, pedicebatæ, globosæ, demum 4-partitæ. Color amæne puniceus. Substantia cai-tilaginea,
firma.—Chartæ laxe adhæret.
We have numerous specimens of this magnificent plant in the most perfect state of fructification. The favebæ,
involucred with four regularly pectinated bracteæ, are sti-iking objects under the lens. The stem is not strictly articulate,
in our specimens at least, but traversed by a strong raised articulated mid-rib, most evident on the old frond
and occupying one-third of the breadth, of the stem. The surface cebules, bke those of other parts of the fr-ond, are
minute, but internaby divided by transverse diaphragms into a series of cebs full of gelatine, whose wabs ai-e formed
of jointed fibres.
* “ Insula Leyden, Batavia,” is also given as a habitat (in Voy. au Pole Sud) probably eironcously, for the
genus has not hitherto been found to the northward of the 40th degree of south latitude.
Plate LXXVII. Fig. 1, favella in situ; 2, the same removed ivith the involucre laid open; 3, sphærospores;
—magnified,
32. CERAMIUM, Adans.
1. Ceeamiom m lrum , var. y, seemidatnm, Agardlq Sp. Mg. p. 149. Cei. secundatum, ly n g h . Hydr.
Dan. t. 37.
Var. i, tenue, Agardh, Sp. Mg. vol. ii. p. 149.
H.VB. Lord Auckland’s group and Campbell’s Is la n d ; both varieties abimdant.
2. Ceeamiüm diaplanum, Agardh, Sp. Mg. vol. ii. p. 150-
Var. 3. AucUaudicvM, proliferum, articulis brevibus.
H a b. Lord Auckland’s group ; not common.
Apparently a curious state of the C. diaplanum,.
3. Ceeamiuji cancellatnm, Agardli, Sp. Alg. vol. ii. p. 145.
H ab. Lord Auckland’s group ; parasitic on other seaweeds, rare.
Om- specimen entbely agi'ees with others coUected at the Cape of Good Hope, and with the description of Agardh ;
it is doubtful, however, whether aU may not he varieties of 0. oisotetum, Ag., from which they differ mainly in the
more branched and less virgate habit. One of our South Afiican specimens is so repeatedly branched, as eminently to
justify Agardh’s character, “ ramis distichis multifidis quasi canceUatis ;” that from Lord Auckland’s gi'oup is taUer
and the extreme divisions alone rctam that character ; neither of these are more than four inches long ; we have, however,
much larger examples, in which it is wholly lost. The station of Agai-dh’s C. cancettatum. is dubious, and his
comparison of it with a plant brought from the Cape of Good Hope hy Gaudichaud, renders it very probable that the
Southern Ocean is its place of growth.
33. G E I ÎF IT H S IA , A g a rik .
1. Geiefithsia setacea, Ag.? vol. Ü. p. 1 2 9 .
H a b . Lord Auckland’s group.
Oiu yoimg and mutilated specimens of what we refer to G. setacea are not sufficient for a satisfactory determination
of the species. The articulations are rather narrower than in the Eiuopean plant, but they do not otherwise
differ.
34. CjVLITHAMNION, L yn g l.
1. Calithamnion gracile. Hook, fil, et Harv.; filo prbnario repente ramoso, caubbus erectis laxe bi-
tripimiatis, pimiis remotis valde elongatis, pinnubs brevdbus alternis erecto-patentibus simpbcibus v. apice
ramulosis, articubs primariis diametro 4 -5-plo, secuiidariis sub 3-plo longioribus.
H.1B. CampbeU’s Island ; dredged up in four fatboms water.
Fita 1-2 luic, longa, gracillbna, e fibriUis repentibus ramosis orta, laxe irregiûaiiter alterne rarius opposite pin-
natim divisa. Sphærospores sessiles, minutæ, sphæricæ. Favettæ ignotæ. Articuti peUucicii. Color roseus. Suhstantia
tenera.
2. Cauthamnion Mont,; “ microscopicum, filo primario repente pimiis pinnubsque oppo