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Campbell's Islands.] for the several reasons adduced by him in his memoir, in the 'Annates des Sciences Naturelles^ Oct. 1842. He must allow us, however, to claim for La Billardiere, not only the discovery of the plant, but that of its fruit also; for, though the description of that author be imperfect, there can exist no doubt that the tubercles immersed in the frond, which he notices, are what we now know to be fructification. We further enter our protest a»ainst the system of changing the specific name from gladiatus, which is quite unexceptionable, to Billardieri. In the general character we have described the spores as finally divided into four, more or less unequal parts, when they resemble the tetraspores of several Floridece, which doubtless, as demonstrated by M. Decaisne and Thuret in other Fucacea, form 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. "With regard to other organs in the Fucacea, which M. Montagne calls gemma? or acrospenns, we incline to consider them analogous to what are termed antheridia in some other families."

1. Xiphophoea Billardieri, Mont. Prodr. Nov. Pliyc. in itin. adPolum Ant a ret. p. 12. Voy. au Pole Sud, Bot. Crypt, p. 55. t. 7. f. 1. Fucus gladiatus, Labill. PL Nov. Roll. II. p. 3. t. 256. Encycl. Met/i. Bot. Si/j>j)l. V. p. 439. Lamouronx in Mem. dii Mm. d'Hist. Nat. XX. p. 36. Turner, Hist. Fiu: t. 240. Berkeley in Ann. Nat. Hist, for 1843, p. 57. Ctenodus, Kiitzing. (Tab. LXIX. Fig. III.)

Hab. Lord Auckland's group ; on rocks in the sea, very abundant.

Conceptacula per totam frondis longitudinem praeeipue apicem versus sparsa, immersa, tuberculiformia, leviter eouvexa, poro pertusa, externe consimilia, interne nucleis diversis instructa. Altera sporas obovatas v. pyrifornies. Sporte magna?, sessiles, e cellulis parietalibus ortae, perisporio hyalino circumdatse, nucleo priuium simplici demum quadripartito nigro-fusco donatse, cum paraphysibus simplicibus articulatis filiformibus achromaticis coninrixtas. Altera contra filis ramosissimis tenuibus hyalinis articulatis farciuntur, quorum externi turgidi materie granulosa repleta evadunt.

Plate LXIX. Fig. III. — Divided spores of Xipkop/iora (called erroneously tetraspores on the plate).

4. LAMINARIA, Ay.

1. Laminaria, (sp.)?

Hab. Campbell's Island. (Br. Lyall.)

A fragment of a young frond, too imperfect for description or determination of the species.