frond; 2, portion of ditto showing the two modes of escape of the spores, either free or contained in the original cells : very highly magnified. (The quaternary division of the spores was not seen in this dissection.)
5. LAMINAEIA, Lamomx.
1. Laminaria /ascia, Ag., Syst. p. 273. Harv. Phyc. Brit. t. 45.
Hab. Hermite Island, Cape Horn, and the Falkland Islands; not common.
These specimens do not appear to differ from British ones in any particular. The L. fascia is a northern, but not Arctic species, found along the shores of England, Ireland, and the German Ocean ; and under the name of L. debilis, it also inhabits the Mediterranean Sea.
6. CAPE A, Montagu.
1. Capea birnncinata, Montagn. in Flor. Canar. Crypt, p. 140. t. 7. Laminaria biruncinata, Bory in Buperrey Foy. Bot. Crypt, p. 101. 1. 10. L. radiata, £. exasperata, Turner Hist. Fuc. vol. ii. p. 16. Hab. Hermite Island, Cape Horn ; /. E. Bavis, Esq.
Our solitary specimen is ban-en, and does not appear different from the plant of the Canary Islands, New Holland, and New Zealand.
We quite agree with Dr. Montagne as to the propriety of separating this genus from Laminaria and EcHonia, which latter is its Cape of Good Hope representative, and is reported to be a native of the Falklands, probably erroneously; as is the station assigned to the Macrocystis of the Canary Islands. On the other hand, there is no reason why the Macrocystis should not accompany the Capea, whose principal parallel is certainly in the Southern Hemisphere.
The fructification of Ecklonia is scarcely known ; we have seen what appear to be young sori in the form of opaque thickened spots on the frond. A transverse section shows the cortical layer to be thickened and formed of parallel tubes full of granules, analogous to what such fructification as Montagne's beautiful analysis of Capea represents would be in an immature state, but we are extremely doubtful of our analysis.
7. DESMARESTIA, Lamomx.
1. Desmarestia media, Grev., Synops. p. 40. Sporoclmus medius, Agardh, Ic. Alg. p. 259. 1. 16. D. anceps, Montagne in Toy. au Pole Slid, Bot. Crypt, p. 5 1 ?
Hab. Cockburn Island, (lat. 64° 12' S., long. 57° W.); floating in the sea, abundant.
One of the most Antarctic of plants and probably common in many latitudes ; for, under other names, it has been noticed as a native of Peru, of various parts of the Pacific Ocean, and even north to the Arctic circle. It is singular that a plant of this small genus, and from which the present is perhaps not specifically distinct, the B. acideata, should be among the highest Arctic Alga, inhabiting Spitzbergen in 80° N. lat. Montagne's B. anceps, confessedly described from imperfect specimens, is very probably this plant, having been gathered in nearly the same locality : or else it is the B. ligtdata, a Cape Horn species.
2. Desmarestia viridis, Lamourx. — Flor. Antarct. Pt. 1. p. 178. Var. (3. distans ; ramis remotioribus.
Hab. Hermite Island, Cape Horn, Falkland Islands, and Kerguelen's Land ; very abundant. Var. /3, Kerguelen's Land.
