440 ALG OF TASMANIA, 
` in ramis elongatis erectis divisis; ramis attenuatis bi- 
tripinnatis; pinnis pinnulisque erecto-patentibus, brevi- 
bus, simplicibus v. ramulosis, apice fibris hyalinis bys- 
soideis ornatis; articulis ramorum diametro 2-4-plo longi- 
oribus, ramulorum brevissimis, 4 striatis; keramidiis.. . .? 
George Town, V. D. L., R. Gunn, Esq., n. 1316 in part.— 
Fronds 6-8 inches high, excessively branched and bushy, but 
not of so shrub-like a character as P. frutex, much divided 
from near the base into long erect branches or stems, which 
are generally simple, or merely throw out from their lower 
part long branches similar to themsélves. These branches 
are in circumscription linear or narrow lanceolate, fasciculato- 
bipinnate throughout their length, the pinne very short, in 
proportion to the length of the branch, or 1 to 4 inch long 
on branches that are 4-5 inches long, erect or erecto-patent, 
pinnulated with short simple spinelike ramuli, the apices 
beset with byssoid fibres. Articulations of the stem and 
branches 4 striate, from 2 to 4 times longer than broad. 
Colour a dull'brownish or grey.—This species, which may be 
looked on as the V. D. Land representative of P. nigrescens; 
is nearly allied to P. frutex, but differs something in habit, 
and clearly in the length of the joints. The structure of the 
stem is similar in both. à 
14. Polysiphonia cancellata, Harv.; frondibus ultrasetacels, 
fruticulosis, spinoso-ramosissimis, articulatis, sulcats; 
ramis e basi emissis, longissimis, flexuosis, divaricatis Y» 
horizontalibus, ramulis alternis, distantibus, patentissimis - 
vix pinnulatis v. margine subuliferis; articulis. diametro — 
duplo brevioribus, reticulatis, 4 striatis; keramidiis mi — 
nutis, ovatis, sessilibus. E 
George Town, V. D. L., R. Gunn, Esq., n. 1318 and 1320. 
—Fronds 4-5 inches high, thicker than bristle at the bas — 
forming a thorny bush, the outline of which is broadly ovate - 
or globose; branches as long as the principal stem, 97^ — 
issuing at right angles with it, flexuous, from a quarter e 
half an inch asunder, furnished with a second series of hori- — 
zontally patent ramuli each about an inch long. que 
