Plate CLXXV. The absence of fructification precludes the necessity of dissections.
3. Delesseria platycarpa, Lamourx., in Ann. du Mm. vol. xx. p. 124. Agardh, Sp. Alg. vol. i. p. 188. Turner, Hist. Fuc. 1. 144.
Hab. Falkland Islands ; abundant in Berkeley Sound and Port William.
Originally discovered at the Cape of Good Hope, where it is very abundant. More recently it has been gathered on the coast of California, whence its existence in the Falkland Islands might have been considered probable, even before its recent discovery in that part of the Southern Ocean. It is very plentiful on the long shelving beaches of the islands in question, but was not seen on the deeper and more rocky shores of Fuegia.
4. Delesseria crassiuervia, Mont. Fl. Antarct. p. 184. Var. (3. costa angustiore.
Hab. Hermite Island, Cape Horn, and the Falkland Islands ; both varieties abundant. Kerguelen's Land; Christmas Harbour, var. a only.
Were the var. $. found upon the coast of Europe, it would be undoubtedly referred to B. hjpoglossum, and it may well be considered very doubtful whether the D. crassiuervia of the Southern Hemisphere be the representative of its northern congener, into the likeness of which it varies; or whether, as is perhaps more probable, both are not varieties of the same species. The true D. ruscifolia is a native of the Cape of Good Hope, of Tasmania, and, according to Gaudichaud, of tie Falkland Islands also.
5. Delesseria quercifolia, Bory in Duperrey Toy. Bot. p. 186. 1. 18. f. 1.
Hab. Hermite Island, Cape Horn, and the Falkland Islands ; most abundant both on the outer coasts and in the harbours.
A very handsome species, of which M. Bory gives a sufficiently characteristic but discoloured figure. The original colour of the plant is a rosy or vinous red. In every respect, except the position of the granules, which are here scattered over the surface of the frond, this is very nearly allied to D. sinuosa, Ag.
6. Delesseria Lyallii, Hook. fil. et Harv.: fronde lineari-oblonga obtusa costata penninervi argute serrato-dentata, nervis oppositis, margine incrassato folia consimilia petiolata emittente, dentibus subulatis simplicibus v. latere inferiore plerumque erosis, coccidiis frondis pagina sparsis, granulis in soros inter nervos laeiniarum sitos dispositis. Nobis in Lond. Journ. Bot. vol. iv. p. 252. (Tab. CLXXVI.)
Hab. Falkland Islands; on the outer coast only, probably washed ashore from the exposed rocks.
Kerguelen's Land ; Christmas Harbour, washed up on the shores. Frons primaria exemplaribus Kerguelensibus 9 unc, Falklandicis 4-5 line, longa, 1-1 -£ uue. lata, in petioluin cylindraceum gradatim angustata, oblonga v. linearis, apice rotundata, costa valida percursa, venosa, venis oppositis, erecto-patentibus, margine argute serrato-dentata, sed non sinuata, iucrassata, fobola seu frondes secundarias emitteus ? Frondes secundaria primariis consimiles, sed plerumque miuores, omnes evidenter petiolata?, e margine incrassato frondis primaria} orta;, venis ejus oppositae v. alternae. Color luride sanguineus.
D. sinuosa habitu formaque frondis colore et substantia siinillima : differt margine incrassato, dentato, non sinuato, et prsesertim frondibus secuudariis evidenter petiolatis, nunquam e laciniis frondis primarise ortis.
A very noble species, of which fine specimens were collected, thrown up on the stony shores of Kerguelen's Land and the outer coasts of the Falkland Islands; and which, as it was never seen attached, either in the shallow or deep bays of any of the coasts visited by the Expedition, finds, we conclude, a congenial home amongst the wild breakers that fringe many parts of these iron-bound coasts. Specifically it is allied to the European D. sinuosa,
