ALG OF TASMANIA, 449 
membranous, not in the least gelatinous, and not adhering to 
paper. Fruit: innumerable spherospores, divided triangu- 
larly, scattered over the whole surface of the frond, dark- 
coloured, solitary, dot-like, immersedin the periphery. The 
structure of the frond internally exhibits very lax anasto- 
mosing central filaments ending outwardly in large cellules. 
—The aspect of this species is very much that of Rhodomenia 
sobolifera, but the structure is very different. 
Tribe 7. CERAMIER, J. Ag. 
35. Ceramium rurum, 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. 1742). 
George Town, V. D. L., R. Gunn, Esg., n. 1309, 1310, 
1311, and 1313. 
37. Spyridia filamentosa, Harv. in Br. Fl. 2, p. 337. 
. George Town, V. D. L.y R: Gunn, Esg., n. 1283, 1312, 
1305 ? (but not 1305).—There are two varieties, to the first 
of which, distinguished by scattered sete or ramuli, the 
above numbers belong. ‘This is identical with the Mediter- 
Tanean and British Plant.—The second variety, or perhaps 
Species, may be called—]5. verticillata, n. 1298. It is re- 
markable for having the setz regularly whorled round the 
branches, and much denser than in var. a. 
38. Spyridia? pellucida, Harv.; frondibus e basi communi 
lata stuposa ortis, tenuibus, pellucidis, monosiphoniis, 
articulatis, roseis, vage sub-dichotomé ramosissimis : ramis 
ad quodque geniculum ramulis brevissimis subulatis op- 
positis y. verticillatis ornatis; articulis diametro sesqui- 
v. subduplo longioribus. 
- George Town V. D. L., R. Gunn, Esq., 1305: also in the 
_ Collection of 1840.—Fronds 5-6 inches long, as thick as those 
of Ceramium rubrum, several growing from the same shaggy 
_ ?RSe, and often matted together below, much and irregularly 
eo eee 2L 
