274 ALGÆ ANTARCTICA. 
Has. Falkland Islands; 8. Cape Horn. 
Fronds 2-3 inches high, bushy. Stems thick, inarticulate, 
densely clothed with flexuous woolly fibres, only slightly 
divided. Branches resembling the stem, throughout their 
length densely shaggy, with slender crowded quadrifarious 
straight branchlets. "These secondary branches are articulate, 
irregularly divided, either pinnate, or having secund or sub- 
dichotomous divisions; but in all cases they are straight, 
and erect, the ramuli mostly appressed. The tips are either 
acute or obtuse, and simple or furnished with short pectinate 
secund ramuli. Colour dark purple. Substance rigid. To 
the naked eye this resembles C. tetricum and C. crinitum, but 
the microscope shows it to be abundantly different. It has 
much the habit of Sphacelaria scoparia, as alluded to in the 
trivial name. 
58. Callithamnion Gaudichaudii, Ag.? fronde fruticosa ramo- 
sissima, caulibus primariis crassis inarticulatis opacis stri- 
atis quadrifariis decompositis sensim attenuatis, ramis 
inarticulatis striatis ramulis plumosis quadrifariis densis- 
sime obsitis, ramulis (vel plumulis) brevibus roseo-pellu- 
cidis articulatis pinnatis et bipinnatis, pinnulis patentibus 
inferioribus simplicibus elongatis subulatis superioribus 
furcatis vel iterum pinnulatis, articulis diametro subduplo 
longioribus. 
var. 8. caulibus longioribus laxius ramosis basi nudis, 
ramulis gelatinosis minus crebris. Cal. Gaudichaudit 
Ag. Sp. Alg. vol. ii, p. 173? 
Has. Cape Horn and the Falkland Islands; 9. Falklands. 
Root scutate. Fronds 2-3 inches (in var. B. 4-5) high, 
shrubby, and much branched. Stem thicker than a hog's 
bristle, divided from the base into numerous branches, 
which spread every way. These are densely clothed with 
secondary branches, which again are covered in every part 
and all round with minute pinnated ramuli or plumules, from 
2 line to aline in length. Favelle large, 2-3-lobed, lobes 
many-seeded. Colour blackish purple, rosy purple under 
the glass. Substance of the branches cartilaginous, of the 
