170 МВ. А. D. COTTON ON CRYPTOGAMS 
The full and revised description of this species, which is illustrated on 
Plates 5 & 6, is as under : — 
Plants single or cæspitose, rather large, much branched, mucilaginous, 
brownish green when dried. Main shoots slender, 20-25 em. long, 1-1:5 mm. 
diam., densely clothed with slender branches. Branches similar to main 
shoots, beset with scattered, scarcely branched ramuli. Structure of stem 
loosely cellular; cells 15-20 ш diam. intermixed with slender filaments 7-9 ш 
thick. Assimilating filaments club-shaped, 5-7-celled, densely packed, 
50-70 ш long, 10-12 wide at apex. Hairs absent? Unilocular sporangia 
obovate, 45-50 x 22-25 u. 
LEPTONEMA FALKLANDICUM, Skottsb. Subant. и. Ant. Meeresalgen, i. р. 52. 
E. Falklands; Port Louis, on Rhodomela in pools, Skottsberg. 
DisrRiB. Falkland Islands. 
SCYTOTHAMNUS RUGULOSUM, Ajellm.in Engler и. Prantl, Natürl. Pflanzen. 
Teil i. Abt. 2, p. 214. Rhodomela rugulosa, Bory, Flore des Malouines, 
p.593. Stereocladon Lyallii, Hook. f. et Harv. in Fl. Ant. ii. p. 468, tab. 174. 
E. Falklands; Berkeley Sound, Hooker; Port Louis, Skottsberg. W. 
Falklands ; Shallow Bay, Vallentin ; West Point Island, Hennis. 
Disrris. Fuegia, Falkland Islands, 8. Orkney, Kerguelen. 
S. FASCICULATUS, Cotton, comb. nov. Dictyosiphon fasciculatus, Hook. f. et 
Harv. in Fl. Ant. i. p. 178; ii. p. 467.  Seytothamnus australis, Skottsb. 
l. e. p. 48, non Hook. f. et Harv. 
E. Falklands, Hooker, Vallentin. 
DisrRIB. Fuegia, S. Georgia, Kerguelen, Auckland Island. 
This plant belongs to the genus Scytothamnus, as was hinted by De Toni. 
Skottsberg with some reservation links it with S. australis, but, from an 
examination of several specimens in the Hooker herbarium, it appears to me 
to be a good and distinct species. For the present therefore it seems best to 
retain the old specific name. ©. asciculatus differs from S. australis in being 
a much more slender plant with a different method of branching, and having 
a more southern range. Presumably all the plants collected by Skottsberg 
in the antarctic belong to this species, and not to S. australis. 
DesMARESTIA WILLI, Аетзсй, т Flora, xlvi. (1888) p. 188. D. viridis, 
Hook. f. et Harv. in Fl. Ant, ii. pp. 178, 466 (non Lamx.). 
E. Falklands ; Berkeley Sound, Port William, Hooker ; Port Louis, Skotts- 
berg. W. Falklands; Shallow Bay, Roy Cove, in за ога] region and 
in pools, Vallentin ; West Point Island, Hennis. 
Disrris. Fuegia, Falkland Islands, S. Georgia, Marion Island, Kerguelen, 
Auckland Island, Victoria Land, Franklin Island. 
This species is apparently common in Fuegia and the l'alkland Islands. 
