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THE SEAWEEDS 
The species of Liagora are very difficult to classify, as they show much 
variation in habit and the degree of incrustation. Abundant in tropical 
seas they also occur along our southern coast. 
The following species are most likely to be met with in South Australia. 
They grow on reefs about low water mark. 
Liagora Clift oni Harvey. 
Frond cartilagino-carnose, scarcely calcareous, terete, dark brownish- 
purple, many times forked, fastigiate, tomentose ; superficial filaments once 
or twice forked, coloured, cylindrical, articulated, the joints one and a 
half times as long as broad. Fifteen cm. to 20 cm. tall, 2 mm. to 4 mm. 
broad. 
From Western Australia to Victoria. 
Liagora Cheyneana Harvey. 
With but little calcareous deposit ; frond gelatinous, compressed, dichoto- 
mous with additional lateral branches. Branches erecto-patent, silvery, 
clothed with a purple tomentum. Peripheric filaments free, cylindrical, 
forked. Seven cm. to 15 cm. long, 1 mm. to 2 mm. in diameter. 
Western Australia (Cape Riche) and probably along the Great Aus- 
tralian Bight. 
Liagora Harvey ana Zeh. 
Forming rounded mats from 5 cm. to 10 cm. in diameter. Altogether 
many times dichotomous, the segments growing slenderer as they radiate. 
No lateral branches. Hard with impregnation of carbonate of lime. Apices 
acute. The cortical threads slender, with cylindrical cells, the terminal sub- 
rounded or sub-clavate. 
All around the southern coast of Australia and northern Tasmania. 
Liagora Wilsoniana Zeh. 
Main branches persisting through the frond, three or four times dichoto- 
mous, with short lateral branches spaced along the axis, these mostly 
undivided, about half an inch long. All branches compressed. Cells of the 
cortical filaments equal, oblong, the terminal shorter. About 12 cm. tall. 
Rather harsh with incrustation. 
Victoria and Tasmania. 
Family CHAETANGIACEAE Schmitz. 
GALAXAURA Lamouroux. 
Frond cylindrical or compressed, subtubulose, impregnated with car- 
bonate of lime. Two strata of cells, the tube occupied by longitudinal 
hyaline fibres, and the peripheric stratum consisting of shorter subvertical 
cells, gradually becoming 5 to 6-angled and coalescing in an areolate mem- 
brane. Cystocarps suspended below the surface, often seriate in transverse 
