OF SOUTH AUSTRALIA. 
99 
Encyothalia GUftoni Harvey. 
The single species. Fronds 30 to 60 cm. long, closely beset with 
racemosely arranged setaceous ramuli, 6 to 12 mm. long, crowned with a 
dense pencil of very slender, jointed, soft filaments, which at length fall 
away. Colour of branches and fruit dark-olive, of the confervoid 
filaments paler. 
Western and South Australia. 
Fig. 55 . — Encyothalia Cliftoni. 
PERITHALIA J. Agardh. 
Frond caulescent, filiform, alternately branched, branches long, virgate, 
crowded with setaceous ramuli not crowned with tufts of hairs. Receptacles 
evolved in ultimate ramuli, like the spike of Typha, oblong-cylindrical, 
composed of crowded sporangiferous filaments. No plumed heads. In 
another stage the filiform ramuli end in minute unplumed heads. 
