264 ALGZ ANTARCTIC. 
parts of the frond are opaque and seemingly inarticulate; but 
a section of the stem shows an articulated axis similar to that 
of many Polysiphonia, a central tube being surrounded by 
about seven others with a thick external stratum of smaller 
cellules. The capsules (or keramidia) are abundantly pro- 
duced on our specimens. Colour dark reddish brown. Sub- 
stance flaccid and closely adhering to paper. 
34. Rhodomela patula, nobis; fronde cylindracea brunnea 
cellulis irregularibus notata vagé bipinnatim ramosa, ramis 
alternis elongatis horizontalibus vel suberecto-patentibus, 
minoribus elongatis patentibus subsimplicibus attenuatis 
nudis. 
Has. Falkland Islands. | 
Frond 4-6 inches long, 4 a line in diameter at the base. 
Stem undivided, set with alternate patent branches 4-6 inches 
long, which in our specimens bear a second series. Colour 
blackish or dark brown. Substance membranaceous. The axis 
of the frond exhibits four large tubes surrounding a central 
one, with an external stratum of small cellules. 
35. Rhodomela Gaimardi? (Ag.) fronde cylindracea flabel- 
latim ramosissima, stipite simplici filiformi, ramis primariis 
divaricatis, secundariis bipinnato-multifidis patentibus, 
laciniis alternis, ramulis brevibus setaceis simplicibus et 
furcatis vel quadrifidis sepe secundis per totam frondem 
sparsis. 
Has. Falkland Islands and Cape Horn. | 
Frond as thick as a bristle, 4-6 inches high, simple at the 
base, above divided into 3-4 flabelliform portions. Primary 
branches subdichotomous or irregular, divaricate, again and 
again bifariously branched ; secondary and tertiary branches 
long, subsimple and filiform, laxly set with short ramuli. 
Ramuli 2-3 lines long, frequently secund, very slender, colour 
dark. Structure similar to that of the last species, from wb 
the present is, possibly, not distinct. We refer to Agardh’s 
synonym with much doubt, as he pointedly describes. his 
plant “ fronde compressa,” whereas ours is clearly cylindrical. 
Nothing more nearly resembling R. Gaimardi than the pre 
