6. Nitophyllum Bonnemakoni, Grev. ; Alg. Brit. p. 81.
Var. laciniatum, fronde nabelliforrni profuude digitatim lobata v. subdichotoine pinuatifida, laciniis inciso-dentatis. N. laciniatum, nobis in Lond. Journ. Bot. vol. iv. p. 256.
Hab. var. laciniatum. Hermite Island, Cape Horn ; on rocks in deep water. Falkland Islands ; not common.
Though not exactly identical with our European N. Bonnemaisoni, we cannot consider this as more than a variety of that plant, which is occasionally found in Britain nearly as much laciniated as the specimens before us are. Stipes, in the Antarctic specimens, i-i inch long, terminating in the thickened cuneate base of the frond, which is 4-5 inches long, and deeply cleft into 5-9 segments, either radiating from the centre in a digitate manner, or springing like pinnules from a lengthened rachis. Colour, a pale brownish-red at the base, becoming rosy upwards.
The N. Bonnemaisoni in the Northern Hemisphere inhabits the Orkney Islands, the west coasts of Scotland and Ireland, and the south-western shores of England.
19. PLOCAMIUM, Lyngb.
1. Plocamium coceineum, Lyngb. ; Harv. P/iyc. Brit., t. 44. Fl. Antarct. p. 186.
Hab. Hermite Island, Cape Horn, and the Falkland Islands ; very abundant.
The present is one of the most widely diffused of the Floridea, both in the Northern and Southern Hemisphere. In Europe it ranges from the shores of the Mediterranean Sea to the North Cape. In Africa it occurs at the Cape of Good Hope, in North America on the coast of California, and it is abundant, on the Atlantic shores of the United States. It inhabits both coasts of South America, but particularly the western ; Tasmania, New Zealand, and the Auckland Islands. The Antarctic specimens are equally luxuriant with those of the Northern Hemisphere.
2. Plocamium Hookeri, Harv.; fronde cartilaginea anguste lineari compressa plana distiche decomposite ramosa, ramis primariis subdicliotomis patentibus, secnndariis alternis flexuosis folia ramulosque alterne gerentibus, foliis planis aveuiis oblique obovato-lanceolatis obtusis basi angustatis cnltratis integerrimis v. margine exteriore crenatis, ramulis linearibus alterne et secunde pectinato-multifidis, stichidiis brevibus lateralibus dense fasciculatis digitalis laciniatis simplicibus obtusis, coccidiis lateralibus sessilibus sparsis. Harv. in Lond. Journ. Bot. vol. iv. p. 257.
Hab. Kerguelen's Land; Christmas Harbour; thrown upon the beach, rare.
Front 8-10 unc. longa, vix lin. diametro, plano-compressa, cartilaginea, nunc subdichotome nunc pinnathn ramosa. Rami primarii patentes ; secundarii circumscriptioue lineares, altemi, flexuosi, ramulos decomposites foliaque gerentes : foliis unc. longis, 1-i— 3 lin. latis, anguste obovatis lanceolatisve, obtusis, aveniis, integerrimis v. rarius secus marginem exteriorem crenatis. Color luride roseus.
One of the most singular species of the genus, from the curious leaf-like appendages on the secondary and lesser branches. It is a very rare plant in Christmas Harbour, and cannot be confounded with any of its congeners-
3. Plocamium? Magellanicum, Hook. fil. et Harv. Thamnophora Magellanica, Montague in Voy. au Bole Sud, Bot. Crypt, p. 142. t. 8. f. 2.
Hab. Hermite Island, Cape Horn ; the Falkland Islands, and Kerguelen's Land ; very abundant.
