10. ANTENNARIA, Link.
1. Antennaria scoriadea, Berk.; spongiosa, floccis fasciculatis sursum lateraliter connexis, peridiis subellipticis irregularibus. (Tab. LXVII. Fig. III.)
Hab. Lord Auckland's group and Campbell's Island; on the branches and twigs of several shrubs and trees, but especially of Dracophyllum longifolium.
Spongiosa, ramos incrustans. Flocci 14–12 unc. longi, fasciculati, superne processibus brevibus lateralibus more Zygnematis connexi, subtus e membrana reticulata vel mycelio repente nascenti, filamentis tenuioribus immixti, erecti, irregulariter ramosi. Articuli moniliformes vel præsertim in filamentis ultimis continui, læves, nucleo globoso solitario. Perithecia subelliptica, irregularia.
A very singular substance, which must strike the traveller through the woods especially of New Zealand or of Lord Auckland's group, in both which localities it is very abundant, resembling charcoal, and sometimes so widely diffused that the branches look as if burnt. The colonists of the former islands call it "the black moss." Distinguished from A. pannosa and A. Robinsonii by its long fasciculate threads, giving it exactly the habit of Scorias spongiosa. The finest specimens have a rigid bristly appearance, quite different from that of any other species of the genus. This has been also gathered in Valparaiso by Mr. Bridges, and at the Swan River by Mr. Drummond. I have not been able to trace the developement of the peridia in the Auckland Island specimens, but it would appear that, as in M. Robinsonii, M. and B., they arise either from a swollen articulation or from a process given off by an articulation, in either case they are dependent on a simple metamorphosis of the latter.
Plate LXVII. Fig. III.—1, a plant of the natural size; 2, flocci from the base of the tufts, with a portion of the cellular matrix; 3, flocci from the summits of the tufts, laterally aggregated; 4, sporangia; 5, portions of the filaments in various states:—all more or less highly magnified.
11. SCLEROTIUM, Tod.
1. Sclerotium durum, Pers. Synops. Fung. p. 121.
Hab. Lord Auckland's group; on the capsules of Gentiana concinna. This production is enumerated here because it has hitherto appeared in the works of Mycologists, but I am decidedly of Léveille's opinion that it should be expunged.
XXXVI. ALGÆ, L.
By W. H. Harvey, Esq., M.D., and J. D. Hooker.
1. MARGINARIA, A. Rich.
Radix ramosa. Frons plana, linearis, sursum flabellato-pinnata; pinnis coriaceo-membranaceis, spinuloso-dentatis, enerviis, dichotome fissis; margine superiore vesiculas petiolatas receptaculaque gerente. Conceptacula receptaculis semi-immersa, globosa, poro pertusa. "Sporæ magnæ, obovato-pyriformes, perisporio initio inclusæ, mox nudæ, e cellulis parietalibus oriundæ, paraphysibus immixtæ, in M. Boryana vero e morphosi ultimi articuli filorum ut videtur ortæ, forsan hinc minutæ et tantum ut gemmæ habendæ."—Mont.
Obs. The genera Marginaria, A. Rich., Carpophyllum, Grev., Scytothalia, Grev., and Seirococcus, Grev., are all very closely related to each other, and to Sargaasum. From the latter they differ more by possessing a frondose, imperfectly leafy mode of growth, than by any very decided structural character; and habit alone will scarcely separate some of them from the decurrent species of that genus, S. decurrens, Peronii, Boryi, &c. These last have
