ALGJE OF TASMANIA. 451 
tenuissimis brevissimis dichotomis densé vestitis ; favellis 
terminalibus, vix involucratis, densissime ramulis hirti- 
formibus velatis; articulis ramorum diametro 4-plo longi- 
oribus, striatis. 
George Town, V. D. L., R. Gunn, Esq., 1285, 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, swol- 
len, 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 en- 
tirely invest, they are lengthened, though never exceeding 
half a line, and much divided dichotomously. The spheros- 
pores (or capsules) are large, dark red, and abundantly scat- 
tered among these ramuli. The favelle are borne on the 
tips of the branches; they are spherical and densely tomen- 
tose ;—but the specimen which produces them is very much 
battered, 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 
attenuatis multoties pinnatis, oppositis vel sepissime 
abortu alternis vel secundis (ramo abortivo ad ramulum 
minutum mutato), nodoso-articulatis, nodis filis minutis 
verticillatis hirtis; pinnulis penultimis ceteris similibus, 
ab quoque nodo duos ramulos oppositos emittentibus ; 
ramulis byssoideis, tenuissimis, alterne v. secunde divisis, 
mies elongatis, erectis ; spheerosporis pedicellatis, ovali- 
George Town, V. D. L., R. Gunn, Esq., n. 1307, and 1303 
dE 2.2 
