155 
Algce of Tasmania. 
George Town, V. D. L., R. Gunn, Esq., n. 1276 .—Fronds 
tufted, 3-4 inches high, quite flat and thin, membranaceous, 
cuneate at base, afterwards preserving nearly an uniform breadth 
of one to two lines, or in the largest specimen nearly J of an inch, 
very irregularly divided, more pinnatifid than dichotomous, some¬ 
times with several secund segments, sometimes palmate, or laci- 
niate ; the axils rounded, and the segments widely spreading or 
divaricated. The margin in our specimens emits small ramenta, 
the youngest of which are linear, then lanceolate, and finally 
forked or palmatifid ; all attenuated at base. Colour a pale dull 
red. Substance membranous, not in the least gelatinous, and not 
adhering to paper. Fruit: innumerable sphrerospores, divided 
triangularly, scattered over the whole surface of the frond, dark- 
coloured, solitary, dot-like, immersed in the periphery. The struc¬ 
ture of the frond internally exhibits very lax anastomosing central 
filaments ending outwardly in large qellules.—The aspect of this 
species is very much that of Rhodomenia sobotifera, but the struc¬ 
ture is very different. 
Tribe 7. Ceramieje, J. Ag. 
35. Ceramium rubrum, Ag. (Conferva rubra, Eng. Bot. t. 
1166.) 
George Town, V. D. L., R. Gunn, Esq., n. 1292 and 1305 
(in part). 
36. Ceramium diaphanum, Roth. (Conferva diaphana, Eng. 
Bot. t. 1472). 
George Town, V. D. D., R. Gunn, Esq., n. 1309, 1310, 
1311, and 1313. 
37. Spyridia Jilamentosa, Harv. in Br. FI. 2, p. 337. 
George Town, V. D. L., R. Gunn, Esq., n. 1284, 1312, 
1305? (but not 1305).—There are two varieties, to the first of 
which, distinguished by scattered setae or ramuli, the above 
numbers belong. This is identical with the Mediterranean and 
British Plant.—The second variety, or perhaps species, may be 
called— verticillata, n. 1298. It is remarkable for having the 
setae regularly whorled round the branches, and much denser 
than in var. a. 
