13. SPHACELARIA, Lyngb.
1. Sphacelaria obovata, Hook. fil. et Harv.j parvula, gracilis, pallide viridis, stupa nulla, froncle circumscriptione obovata, caule gracili articulate-basi longe nudo supra medium ramis plurimis tenuibus elongatis erecto-patentibus lase distiche pinnatis ornato apicibus sphacelatis. Nobis in Lond. Journ. o/Bot. vol. iv. p. 251.
Hab. St. Martin's Cove, Hermite Island, Cape Horn, in about eight fathom water ; very scarce.
Csespitosa, supeme fastigiatim ramosa. Frondes 1-1-j unc. longse, caule ramisque graeibbus, per totam longitudiuein articulatis.
We have seen no specimens of this, but what were dredged up from a considerable depth ; and, if fully grown, the outline of the frond alone is sufficient to distinguish it from its congeners.
2. Sphacelaria /wmcttfom, Mont. Ft. Aidant. Pt. 1. p. 180.
Hab. Cape Tres Montes, South Chili ; C. Darwin, Esq.
The representative of the European S. scoparia. We have a note, unaccompanied, however, by any specimen, purporting that this species was also found in the Falkland Islands.
14. CLADOSTEPHUS, Ag.
1. Cladostephtjs spongiosis, Agardh, Sjj. Ahj. vol. ii. p. 15. Engl. Bot. t. 2427. f. 1.
Hab. Hermite Island, Cape Horn, and the Falkland Islands ; abundant.
This plant varies considerably at several periods of the year, becoming bare of ramidi in the winter. It is abundant in the German Ocean and on the Atlantic shores of Europe, and extra tropical North America, in the Mediterranean Sea and Canary Islands, but has not been hitherto found within the Tropics. We regard these specimens as specifically identical with others of British growth.
15. ECTOCARPUS, Lyngb.
1. Ectocarpus tomentosxis, Lyngb. Grev. Crypt. Flor. t. 316.
Hab. St. Martin's Cove, Hermite Island, Cape Horn ; rare.
The European shores of the Atlantic Ocean and the German Sea are the only previously recorded habitats for this species.
2. Ectocarpus siticutosus, Lyngb. Engt. Bot. t. 2319.
Hab. Hermite Island, Cape Horn, and Berkeley Sound, Falkland Islands ; abundant.
Apparently a much more widely distributed species than the former, ranging from the Baltic Sea and German Ocean to the Mediterranean and Canary Islands, also along the shores of the United States. In the Southern hemisphere it has been found at the Cape of Good Hope and New Zealand.
3. Ectocarpus geminatus, Hook. fil. et Harv.; csespite basi intricate ramoso ohvaceo v. virescente, filis inajusculis tenuibus ramosissimis apice liberis plumosis, ramis ramulisque patentibus oppositis quatemisve ultimis brevibus, utriculis sessilibus oppositis conicis basi ssepe ramulo brevi bractea;formi suffultis. Nobis in Lond. Journ. Bot. vol. iv. p. 251.
