OF SOUTH AUSTRALIA. 
317 
the smaller simply pinnate. Pinnae and pinnulae with a fan-like outline 
regularly circumscribed, many times dichotomous, the divisions gradually 
tapering to tine points ; many tubed in their lower part, becoming less and 
less compound towards their apices, and ending in single-tubed, dichoto- 
mous filaments. Substance tender, closely adhering to paper. Colour 
brilliant red. Cystocarps very large, at first ovate, afterwards nearly 
globose, seated below the terminal filaments. Stichidia lanceolate acuminate, 
stalked, borne near the apices of the polysiphonous part of the frond. 
South Australia (Encounter Bay, Investigator Strait, Eastern Bays), 
West Australia, Victoria, Tasmania. 
Fig. 
153 . — Heterosiphonia Gunniana : a, portion of a 
frond; b, cross-section of stem; c, part 
of branch, with small pinna and stichidia; 
d, cystocarp. ( b to d, after Harvey.) 
Heterosiphonia wrangelioides ( Harv. ) Falkenberg. 
= Dasya wrangelioides Harvey. 
Stems numerous, rising from decumbent, creeping filaments, 4 cm. to 
10 cm. long, setaceous, furnished with a few, irregularly alternate or 
secund, simple, patent, incurved branches; all parts of the stem and 
