450 ALGÆ OF TASMANIA. 
divided on a dichotomous type, the lesser branches generally 
alternate, straight; the apices not hooked in. Every part of 
the stem is clearly jointed, one-tubed and pellucid, but red- 
coloured, and all the larger and smaller branches, and the 
stems to their very base, are furnished at each joint with 
short, awl-shaped, opposite or cruciate ramuli, which are 
jointed like the stem, and more than half its diameter. 
These sufficiently mark the species from any variety of 
C. rubrum, and seem to indicate an affinity with Spyridia : 
but I am not sure that I am right in referring it to this 
genus, in preference to Ceramium, with which the structure 
of the frond more nearly agrees. 
39. Griffithsia setacea ? Ag. 
George Town, V. D. L., R. Gunn, Esq., n. 1290, 1302.— 
These specimens are not in fruit, and have not been suffi- 
ciently displayed to show the ramification; n. 1302, as well as 
it can be examined, seems identical with the European form; 
n. 1290 is smaller, more slender, and may be different. 
40. Griffithsia flabelliformis, Harv.; fronde latissime flabel- 
lata, petiolatá, multoties dichotomA ; axillis inferioribus 
patentissimis, superioribus acutis; articulis inferioribus 
cylindricis, diametro 4-5 plo longioribus : superioribus ellip- 
ticis geniculis maxime contractis; ultimis moniliformibus, 
attenuatis. 
George Town, V. D. L., R. Gunn, Esq., n. 1294.—A large 
species, 6 inches long, by 7 inches wide, twelve or fourteen 
times dichotomous. "The lower axils very patent, the upper 
equally acute and close. Joints in the patent portion of 
frond cylindrical, 4-5 times longer than broad; in the erect 
or upper portion strongly contracted at the genicula, swollen 
in their middle, and thrice as long as broad; those of the 
ultimate divisions, which taper to a very fine point, 
into a string of elliptical beads. Colour a fine blood reb — 
Substance lubricous, but less gelatinous than in G. corallina, ; 
to which this species is very closely allied- E 
41. Wrangelia plumosa, Harv.; caule nodoso, articulato» 
frondem  percurrente, tripinnato ; pinnis pinnulisque 
nodoso-articulatis ; nodis omnibus ramulis verticillat | 
