Alga of Tasmania. 
157 
thrice as long as broad; those of the ultimate divisions, which 
taper to a very fine point, resolved into a string of elliptical 
beads. Colour a fine blood red. Substance lubricous, but less 
gelatinous than in G. corallina, to which this species is very 
closely allied. 
41. Wrangelia plumosa, Harv.; caule nodoso, articulato, fron- 
dem percurrente, tripinnato; pinnis pinnulisque nodoso-articu- 
latis ; nodis omnibus ramulis verticillati tenuissimis brevissimis 
dichotomis dens& vestitis; favellis terminalibus, vix involucratis, 
densissime ramulis hirtiformibus velatis ; articulis ramorum dia- 
metro 4-plo longioribus, striatis. 
George Town, V. D. L., R. Gunn, Esq., T285, 1315.— 
Fronds 6 inches long or more; stems robust, nearly half a line 
in diameter at the base, gradually attenuated upwards, undivided, 
or breaking near the base into a few principal stems, erect, closely 
set with alternate branches, which are themselves twice pinnate : 
the whole frond is therefore thrice divided in a pinnate manner, 
and luxuriant specimens even still more decompounded. The 
main stem and branches are all evidently jointed, the joints 3-4 
diameters asunder, swollen, or knobby, and each densely clothed 
with minute, almost fibrilliform, dichotomous and gelatinous 
ramuli, which in the old parts are sometimes worn down into 
hairyness. In the young parts, and especially in the pinnules, 
which they entirely invest, they are lengthened, though never 
exceeding half a line, and much divided dichotomously. The 
spharospores (or capsules) are large, dark red, and abun - 
dantly scattered among these ramuli. The favellat are borne on 
the tips of the branches; they are spheorical and densely tomen- 
tose;—but the specimen which produces them is very much bat¬ 
tered, which is perhaps the cause of the seeming absence of 
involucre. Colour dark grey, fading in fresh water, and slightly 
staining paper pink. Substance tender and gelatinous. 
42. Callithamnion ? comosum, Harv. ; caule elongato, tenui, 
crinito, frondem percurrente, ramosissimo; ramis sensim at¬ 
tenuate multoties pinnatis, oppositis vel ssepissime abortu 
alternis vel secundis (ramo abortivo ad ramulum minutum 
mutato), nodoso-articulatis, nodis filis minutis verticilatis 
