174 
THE SEAWEEDS 
Solieria r.obusta (J. Ag.) Kylin. 
Frond dendroid, 30 cm. to 60 cm. high, robust, excessively branched, 
branches alternate or scattered, many times alternately compounded. 
Diameter 3 mm. to 6 mm. All the segments pointed at both ends, fusiform. 
The substance fleshy and succulent, soft and flexible. Colour a deep-red. 
Grows in fairly deep water. 
Western Australia, South Australia (Encounter Bay, Investigator 
Strait), Victoria, Tasmania. 
ARESCHOUGIA Harvey. 
Frond compressed, distichous or terete, with all-round branching. In 
the centre runs a prominent monosiphonous articulated axis, from each 
joint of which emerges a branch on each side. Around this is a medullary 
stratum, often of great width, consisting of longitudinal, anastomosing inter- 
woven filaments; there may follow an intermediate stratum of roundish 
coloured cells; and outside is the cortical stratum, well developed, of 
minute vertically-seriate, coloured cellules. Cystocarps immersed in the 
medullary stratum, enclosed in a network of filaments, and opening by an 
external pore, containing moniliform strings of spores, radiating from a 
central placenta, Tetrasporangia in the cortical stratum of the ramuli, 
zonately divided. All coriaceous-cartilaginous. 
a. Frond terete. 
Areschougia Laurencia (Hooker and Harvey) Harvey. 
Frond equally filiform, terete, sub-dichotomously branched on all sides, 
above sub-corymbose, below bare ; larger branches erecto-patent, scarcely 
attenuated; smaller branches narrowly lancoid, with cystocarps immersed 
in nodose inflations. Colour dark-purple. 
Western Australia, South Australia (Encounter Bay, Investigator Strait, 
Eastern Bays), Victoria, Tasmania. 
Areschougia congest a (Turn.) J. Agardh. 
= A. gracilarioides Harvey. 
Frond caulescent, above gradually tapering, terete, branching on all sides ; 
above subcorymbose, below the smaller ramuli sub-seriate, larger ramuli, 
erecto-patent at base and scarcely attenuated; ramuli patent, ultimately 
slightly attenuate on both sides. 
South Australia (Eastern Bays), Victoria. 
b. Frond two-edged, flat and linear. 
Areschougia ligidata Harv. 
== Areschougia australis Harvey. 
Stem terete at base, compressed, flattened and midribbed upwards, laxly 
much branched, branches ligulate, linear, elongate, distantly denticulate; 
ramuli constricted at base, sub-obtuse. Height 50 cm. to 90 cm., width fairly 
