318 
THE SEAWEEDS 
branches pellucidly articulated. Stem and branches set throughout, at 
distances of 1 mm. or less, with distichous, very minute, ramelliferous 
rarnuli. Rarnuli less than 2 mm. long, clothed with multifid, squarrose, 
monosiphonous ramelli of about their own length. Cystocarps borne on the 
rarnuli, globose, with a long, .protruding, cylindrical neck and crenulate 
aperture, areolated, containing a dense tuft of strings of oblong or oval 
spores. Stichidia very minute, on the ramelli, varying from ovate-acute to 
oblong-lanceolate, seldom containing more than two to four tetraspores. 
Colour a deep crimson-red. Substance membranous, adhering weakly to 
paper. 
Western Australia, Victoria, South Australia ( Investigator Strait). 
Heterosiphonia multiceps ( Harv. ) Falkenberg. 
= Dasya multiceps Harvey. 
Frond 4 cm. to 8 cm. long, caespitose from a coarse attachment, simple 
or sparsely pinnate, articulate ; pinnellae secund, distichous, dichotomously 
pinnate, polysiphonous at the base, becoming monosiphonous in the ramelli, 
which are elongate, attenuate, and subfasciculate, bearing stichidia at the 
apices. Stichidia scattered among the pinnellae, carried on polysiphonous 
stems, lanceolate linear, the articulations of the pinnae 8-11 siphoned. 
West Australia (Rottnest Island, Fremantle). 
Heterosiphonia^. guichensis (Reinb.) De Toni. 
= Dasya guichensis Reinbold. 
Frond 8 cm. long, slightly compressed, wholly articulate, subspongiose 
below, widely branched, with pinnae and pinnellae; stem and rarnuli, 
articulate, 10 spihoned; pinnae and pinnellae issue from the articulations, 
secund, alternate and distichous ; pinnellae below polysiphonous, becoming 
monosiphonous, divaricate, dichotomous. Stichidia formed on the poly- 
siphonous ramelli, with a polysiphonous pedicel; the young ovate, fully 
developed sublanceolate, almost cylindrical, with two rows of tetrasporangia. 
South Australia (Eastern Bays). 
Heterosiphonia crassipes (Harv.) Falkenberg. 
= Dasya crassipes Harvey. 
Frond 7-10 cm. long, thickly corticate, terete, pinnate, irregularly 
branched ; the rarnuli ecorticate, very densely branched, spongiose, issuing 
distichously, densely fasciculate, with monosiphonous pinnae, bearing 
stichidia. Stichidia lanceolate, carried very thickly near the stem. 8-12 
siphons in the rarnuli. Cystocarps large, inflated, globose, pedicellate. 
Colour red, drying darker; substance rigid, adhering more or less to paper. 
West Australia (Rottnest Island). 
Heterosiphonia Curdieana (Harv.) Falkenberg. 
= Dasya Curdieana Harvey. 
Frond up to 25 cm. long, above corticate for a long distance, terete, pin- 
nate, irregularly branched; the rarnuli below are corticate; the young 
rarnuli articulate, bare at the base, and branched above ; ramelli pinnately 
