270 
THE SEAWEEDS 
Cystocarps sessile, very wide in proportion to the length, with large aper- 
tures, lateral or terminal. Colour very dark, rich redbrown, becoming 
darker and browner in drying. Substance soft and rather flaccid, adheres 
to paper. Most closely related to P. mollis of the Australian species. 
South Australia (Eastern Bays), Victoria. 
Polysiphoma flavescens Zanardini. 
Zanard. Phyc. Austral. Nov. (1874), p. 490, n. 11; De Toni Syll. Alg. 
IV., 955. 
Frond almost setaceous, ecorticate from the base, branching dichotomous- 
pinnate ; ultimate ramuli attenuate, elongate, fibrilliferous ; tetrasiplionous, 
articulate, pellucid; primary articulations 1-6 times as long as broad. 
Tetrasporangia large, ellipsoid, occupying lateral ramuli on all sides, 
attenuate and subtorulose. Colour rose. Substance flaccid. 
Tasmania (Georgetown). 
