OF SOUTH AUSTRALIA. 
133 
and bears on all sides long worm-like branches tapering at the tips. Colour 
a dull brownish-purple. Substance tough and elastic, very soft. 
Especially from Western Australia. 
Helminthocladia densa (Harvey) Schmitz. 
Frond with main terete stem, robust, irregularly forked, the stem and 
branches emitting slender, many times dichotomous, divaricating ramuli ; all 
the axils very wide. Height 15 cm. to 20 cm. and with an equal spread. 
Colour very dark brown-red, often blackening when dry. Substance very 
soft, highly elastic and lubricous. 
Victoria and Tasmania. 
ENDOSIRA J. Agardh. 
J. Agardh described a form gathered by Miss Hussey at Port Elliot 
as the foundation of a new genus. The peculiarity seems to be in the 
“cutis,” composed of two orders of cells, one of rounded oblong cells, 
apparently empty, spaced out forming spheres around the central cell ; the 
others coloured, occupying intercellular spaces, and joined in jointed 
threads. Agardh does not connect or contrast it with the other genera of 
the family. 
Endosira australis J. Agardh. 
Frond 7 cm. to 10 cm. tall, about a mm. thick. Inferior branches spread- 
ing, middle sub-corymbose racemose, upper enclosed in mucus. 
South Australia (Port Elliot). 
HELMINTHORA J. Agardh. 
Frond terete, gelatinous, branching on all sides, with central axis of longi- 
tudinal fibres and a cortex of radiating vertical threads. No pericarp ; the 
carpospores are borne in the swollen cells of the peripheral or vertical 
threads. Tetrasporangia not known. 
Helminthora tumens J. Agardh. 
Frond terete, becoming much thickened below, decompound pinnate. 
Peripheric threads short, elevate, with nearly globose terminal joints. 
Victoria. 
Considered by Harvey as identical with the European H. divaricata but 
separated by Agardh because of its more robust growth. 
LIAGORA Lamouroux. 
Frond terete or compressed, mostly dichotomous, but also laterally 
branched, distinguished by a calcareous deposit in the outer parts. When 
decalcified manifests the general structure of the family, axial longitudinal 
branching and intricate fibres, cortical radiating poly dichotomous 
articulated threads. Cystocarps evolved among the peripheric threads, con- 
sisting of a fasciculus of pregnant threads. Tetrasporangia in node-like 
swellings of the upper part of the frond, irregularly cruciately divided. 
Young parts lubricous. Older parts white with calcareous deposits but not 
stiff and brittle as the Corallines. 
