138 
THE SEAWEEDS 
Wrangelia halurus Harvey. 
Frond flaccid, membranaceo-gelatinous, irregularly branched, 
branches sub-simple, tapering, whorled at each node with di- 
trichotomous, incurved, imbricated ramelli; articulations of the 
stem three to four times and of the ramelli, cylindrical, 10 to 12 
times as long as the diameter. Cystocarps terminating short 
branches. Tetrasporangia pedicellate, clustered round the joints 
of the ramelli. Height 7 cm. to 15 cm. Colour dull-brown. 
Usually epiphytic on Cymodocea. 
Western Australia, Victoria, and South Australia (Encounter 
Bay and Investigator Strait). 
Wrangelia verticilla^ta Harvey. 
Fronds ecorticate but girt below by a spongy stratum of threads 
joining the verticils. Sub-pinnately decompound. The sub- 
confluent verticils often shorter than the internodes, the joints 
of the ramelli six to eight times longer than the diameter. 
From Western Australia through South Australia (Eastern 
Bays) to Victoria and Tasmania. 
Wrangelia crassa Hooker and Harvey. 
Fronds ecorticate but girt below with a sponge of the sub- 
confluent ramelli, the spongy coat longer than the internodes, sub- 
pinnately decompound ; ramelli of the whorls incurved, cylindrical, 
obtuse, the joints three to four times as long as the diameter. 
West and South coasts of Australia and Tasmania. 
Wrangelia Wattsii Harvey. 
Frond rigid, sub-dichotomous; stem and branches clothed with 
deflexed or decurrent filaments, and whorled at the nodes with 
erecto-patent ramelli ; joints of the ramelli three to four times as 
long as broad; apices obtuse. Harvey says that in TV. crassa each 
articulation has a long narrow endochrome, set in a very wide 
margin of gelatinous cell-wall; in TV. Wattsii the endochrome fills 
up the whole space, and the cell-wall is thin and membranous. 
Seven cm. to 15 cm. high. Dull-brown. 
South Australia (Port Elliot, Eastern Bays) and Victoria. 
