310 
THE SEAWEEDS 
at uncertain points of the network; they are oval, containing minute 
granules. Colour pale-rose fading to dirty red-brown in drying. Substance 
membranous, not gelatinous, closely adhering to paper in drying. 
Victoria (Port Fairy, Port Phillip, Western Port). 
DASYA Agardh. 
Frond filiform or compressed, dendroid ; stem and branches coated with 
small, polygonal cells (rarely articulate and many tubed), the axis 
articulate, composed of numerous radiating cells surrounding a central 
cavity ; ramelli articulated, one-tubed. Cystocarps ovate and urceolate. 
Stichidia lanceolate, attached to the ramelli and containing triangularly 
divided tetraspores in transverse rows. 
Dasya Wilsonis J. Agardh. 
Frond terete, ecorticate; ramuli subdichotomous, above forming loose 
corymbs, below irregularly pinnate; the ramelli monosiphonous almost 
from the base, very dense, somewhat spongiose, widely dichotomous, thick 
and curved, contracted at the joints; younger ones acuminate, the lower 
ones obtuse. Stichidia carried at the apices; stichidia short, ovate, sub- 
lanceolate, pedicellate, monosiphonous, fertile in alternate articulations. 
South Coast of Australia. 
Dasya hapalathrix Harvey. 
Stem very long, over 1 metre, percurrent, inarticulate, quite glabrous ; 
branches lanceloate in outline, alternate, twice or three times pinnately 
decompound, the ultimate ramifications setaceous, all corticated and opaque ; 
ramelli confined to the ultimate branchlets, very soft and byssoid, dicho- 
tomous, their articulations four to five time as long as broad. Cystocarps 
sessile, urceolate, with a prominent orifice. Stichidia ovate-lanceolate, 
acuminate. 
Attachment or holdfast discoid. Frond 2 mm. to 4 mm. in diameter, 
with a linear-lanceolate general outline, not perfectly distichous; with a 
percurrent, glabrous and glossy, opaque stem, set at intervals of 2 cm. to 
5 cm. with lateral branches, the lower and middle ones of which are about 
25 cm. long, the upper gradually shorter, all somewhat attenuated at the 
base and glabrous and inarticulate like the stem. These branches are closely 
set with subspirally inserted, alternate, slender, secondary branches, which 
sometimes bear a third and fourth series, sometimes only a third. The 
latter series rapidly diminish in diameter, as compared with the set from 
which they spring, and the ultimate divisions are barely setaceous, almost 
capillary. All, to the smallest, are clothed with cortical cellules, without 
trace of articulation. Ramelli are only found on the ultimate setaceous 
branchlets, and only on their upper half; they are densely crowded, 
excessively slender, and very soft, but tough and not soon decaying in fresh 
water, 4 mm. to 6 mm. long and repeatedly dichotomous, of a rosy colour. 
The cystocarps are of small size compared with other species, and sessile 
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