OF SOUTH AUSTRALIA. 
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long as broad; the cell walls are thick and gelatinous and the endochrome 
narrow. Tetrasporangia are borne in the forks of the ramuli on very short 
pedicels. The colour is a clear pinky-red ; substance soft ; and the plant 
quickly decomposes in the air or in fresh water. Adheres strongly to paper. 
West Australia (Garden Island), Victoria (Port Phillip, Western Port). 
Monospora (?) Griffithsioides (Sond.) De Toni. 
= Griffithsub setacea Harvey. 
Frond 6-10 cm. long or more, erect, fasciculate, fastigiate, irregularly 
dichotomous; lower apices of the short lateral ramuli are fertile, articulate, 
cylindrical. Tetrasporangia on the inner side, shortly pedicellate, single at 
first, then in groups, semi-verticillate. Conspicuously hyaline-limbate. 
Adheres to paper, which it tints red. 
South Australia (Encounter Bay, Investigator Strait, Eastern Bays), 
Victoria, Tasmania, New Zealand. 
Monospora elongata (Harv.) De Toni. 
= G allithamnion elongatum Harvey. 
Frond caespitose, elongate, wholly articulate, below twisted and sub- 
funiliform, irregularly dichotomous ; ramuli laterally and terminally 
fasciculate, fascicles fertile, articulate, cylindrical. Tetrasporangia on the 
lower side of the converging ramelli, shortly pedicellate, single at first, then 
collected in groups. Cystocarps in the short lateral ramuli. 
South Australia (Encounter Bay, Eastern Bays), Tasmania. 
PLEONOSPORIUM Naegeli. 
F^rond erect, finely filiform, alternately distichous or furcately branched, 
corticate immediately above the rhizoids. Cystocarps grouped laterally at 
the apices of the ramelli. Antheridia ovoid, arranged in same way as 
tetrasporangia. Tetrasporangia are polysporus, spores radiating laterally, 
borne singly on the articulations, on the upper ramuli of the frond. 
Pleonosporium (?) comatum (J. Ag.) De Toni. 
= Lophothamnion comatum J. Agardh. 
Frond 6-10 cm. long, subconical, ramuli subpaniculate, more or less dense, 
irregular ; the lower ramelli are stupose almost to the apices, the apices very 
densely branched, ramelli spreading in all directions, elongate, free. Tetra- 
sporangia subsecund in a long row on the interior side of the ramelli. 
South Coast of Australia, Tasmania. 
Subfamily Callithamnieae (Kutzing) Schmitz. 
C ALLITHAMNION Lyngbye. 
Fronds erect, filiform, abundantly furcately or laterally (spreading to 
all sides or above distichous) branched, monopodial or sympodial, articulate, 
monosiphonous, naked or at length thickened internally or coated 
externally with decurrent filaments. Cells plurinucleate. Cystocarps 
usually twin in the axils or sessile on the ramuli, slightly stipitate, destitute 
H 
