OF SOUTH AUSTRALIA. 
245 
Asparagopsis Sanfordiana Harvey. 
Fronds erect, springing from tangled creeping rhizomes, about 2 mm. 
thick below, attenuated upwards. Fronds naked for half or three-fourths 
their length, densely clothed above with penicillate-multifid branchlets. 
Branchlets 1 cm. to 3 cm. long, inserted on all sides, many times pinnated, 
and finally capillary. Ultimate ramelli filiform, attenuated, sub- 
compressed, curved inwards and coated with polygonal irregular cellules. 
Stem inarticulate, consisting of a slender articulated single-tubed axis and 
a cortical stratum of large, oblong cells, with a layer of minute coloured 
celis externally. Cystocarps formed at the apex of abbreviated, transformed 
ramuli, containing a large tuft of spores. .Colour a dark brownish-red. 
Western Australia, South Australia (Kangaroo Island). 
Family RHODOMELACEAE (Reichenbach) Harvey. 
CONSPECTUS OF THE SUBFAMILIES. 
a. The whole frond a monopodium, i.e., the primary 
segments of the frond proceeding from joints 
arising from the same apical cell, 
b. Apical cell immersed in a depression. Central 
axis very imperfectly clothed in a ring of peri- 
central siphons. Tetrasporangia nidulating 
immediately below the superficial stratum. 
of cells Laurencieae. 
bb. Apical cell not immersed in a depression 
(except in some Chondriae). Central axis 
clothed in a perfect ring of pericentral 
siphons. Tetrasporangia formed from a cell 
adjacent to a pericentral cell. 
c. Pericentral cells almost always undivided, 
d. Fronds radiately constructed. 
e. Frond destitute of persistent lateral 
mono-siphonous filaments. 
f. Tetrasporangia not disposed in the 
spiral line; in twos or threes in each 
segment. Pericentral cells five, con- 
spicuous, corticated Cko'ndrieae. 
ff. Tetrasporangia, one in each segment 
disposed in a straight or spiral line. 
Tetrasporangiferous branches like 
the sterile, or differing from them 
and forming stichidia. 
