nd and 
ly nd Campbell's Islands. | CRYPTOGAMIA ANTARCTICA. 65 
by Dr, for the several reasons adduced by him in his memoir, in the ‘ Annales des Sciences Naturelles, Oct. 1842. He must 
nited by allow us, however, to claim for La Billardiére, not only the discovery of the plant, but that of its fruit also; for, 
010, though the description of that author be imperfect, there can exist no doubt that the tubercles immersed in the 
er having frond, which he notices, are what we now know to be fructification. We further enter our protest against the 
Í specifie system of changing the specific name from gladiatus, which is quite unexceptionable, to Billardieri. In the general 
eceptacles character we have described the spores as finally divided into four, more or less unequal parts, when they resemble the 
but two tetraspores of several Floridee, which doubtless, as demonstrated by M. Decaisne and Thuret in other Fucacee, form 
ruck with together but a single spore. Young, and even nearly mature, seeds exhibit no traces of this internal division ; 
while those that are fully grown and have assumed a dark colour, are divided by very clear lines and even spaces. 
e spores, “With regard to other organs in the Fucacee, which M. Montagne calls gemme or acrosperms, we incline to con- 
would be sider them analogous to what are termed antheridia in some other families." * 
1. XIPHOPHORA Billardieri, Mont. Prodr. Nov. Phye. in itin. ad Polum Antarct. p.12. Foy. au Pole 
EN Sud, Bot. Crypt. p. 55. t. 7. f. م1‎ Fucus gladiatus, Labill. Pl. Nov. Holl. II. p. 3. ۰ 256. Encycl. Meth. 
üllemm, Bot. Suppl. V. p.439. Lamourous in Mem. du Mus. 0 Hist. Nat. XX. p. 36. Turner, Hist. Fuc. t. 240. 
Berkeley in Ann. Nat. Hist. for 1843, p.57. Ctenodus, Kützing. (Tas. LXIX. Fig. IH.) 
Has. Lord Auckland’s group; on rocks in the sea, very abundant. 
es, age Conceptacula per totam frondis longitudinem preecipue apicem versus sparsa, immersa, tuberculiformia, leviter 
مسر‎ convexa, poro pertusa, externe consimilia, interne nucleis diversis instructa. Altera sporas obovatas v. pyriformes. 
i Spore magne, sessiles, e cellulis parietalibus orte, perisporio hyalino circumdatee, nucleo primum simplici demum 
es quadripartito nigro-fusco donate, cum paraphysibus simplicibus articulatis filiformibus achromaticis commixte. 
MIS Altera contra filis ramosissimis tenuibus hyalinis articulatis farciuntur, quorum externi turgidi materie granulosa 
— repleta evadunt. 
ne Puate LXIX. Fig. ITI.—Divided spores of Xiphophora (called erroneously tetraspores on the plate). 
Aucklands 4. LAMINARIA, 4y. 
1. LAMINARIA, (sp.)? 
Has. Campbell’s Island. (Dr. Lyall.) 
Tu. A. fragment of a young frond, too imperfect for description or determination of the species. 
ns. Mal. 
jt On. l * The remark in inverted commas was made by Dr. Harvey.—The division of the spores of Fucacee was observed 
B. while examining the D’ Urvillea utilis in a fresh state, when they were considered as tetraspores, and again by Dr. 
Montagne and by myself, in dried specimens of Xiphophora. More recently, and since the above was written, the 
interesting paper of MM. Decaisne and Thuret has appeared, in the * Annales des Sc. Nat.’ (Series 3. vol. iii. p. 1.) 
ان‎ It is there shown that this structure exists in five species of Fucus abundant on our shores; F. nodosus, serratus, 
vesiculosus, canaliculatus and tuberculatus : also in Himanthalia, which I have elsewhere allied to D’ Urvillea (London 
portion d Journ. of Botany, vol. ii. p. 325), and the mode of division in the original spores is excellently followed and illus- 
trated, as also their germination, a most important point. I cannot omit here an allusion to two of the most re- 
markable recent discoveries in modern Botanical Science, made by those observers, and published in the same paper : 
—that of organs, in every respect analogous to the antheridia of mosses (of whose nature my coadjutor, Mr. Harvey, 
per totam had formed the same idea), existing in all the above-mentioned Fuci; and these antheridia being wholly filled, be- 
as, nist gore bursting, with bodies endowed with rapid motion and apparent volition, and which, though thus proved to 
mosoni, be truly of vegetable origin, have hitherto been ranked in the animal kingdom. I am indebted to the friendship 
sforenfit of M. Decaisne for a demonstration of these curious phenomena in living 4/ye, and for the original drawings from 
os, ad which the plates that accompany his interesting paper in the ‘Annales’ are executed.—J. D. H. 
y 
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