394 
THE SEAWEEDS 
Amphiroa granifera Harvey. 
Frond di-trichotomous, fastigiate ; articulations cylindrical, the lower 
ones at the base and apices thickly nodose, the upper ones simple ; the lower 
points calcareous-granulose, the uper ones bare. Conceptables secund on 
the ramelli. 
Victoria (Port Fairy), West Australia (Cape Riche). 
Amphiroa ephedraea (Lamarck) Decaisne. 
Frond 25 cm. to 30 cm. long or more, much branched; the lower divisions 
often trichomotous, the upper divisions and branches dichotomous. All 
the axils acute, and the branches tapering to the extremity. Articulations 
in all parts of the frond cylindrical, or the upper ones very slightly com- 
pressed, smooth when barren, densely warted all over when in fruit; 
separated by a naked, cartilaginous, dark-coloured joint. Colour a dull 
lurid purple, turning to green. 
South Australia, West Australia, Victoria, New South Wales, South 
Africa, Japan. 
Amphiroa gracilis Harvey. 
Frond elongate, terete, slender, di-trichotomous, fastigiate; joints cylin- 
drical, equal, truncate at the base and apex, all very long, 10-14 times as 
long as broad ; nodes naked, as long as broad ; whole frond 6 cm. to 
10 cm. high. Cystocarps prominent', tubercular, formed not only on the 
upper, but on the medial and often on the lower articulations; closely 
placed on every side. Colour when fresh full purple, becoming pale red 
oi white on exposure. Substance very brittle. Does not adhere to paper. 
V est Australia (Rottnest Island, King George Sound). 
Amphiroa charoides Lamouroux. 
= Metagoniolithan charoides (Lamour.) Weber van Bosse. 
Frond 6 cm. to 10 cm. long, forming globose, fastigiate tufts, much 
branched in an irregularly trichotomous or verticillate manner. Branches 
not much divided, beset at every joint with numerous whorled ramuli, each 
of which consists of a single articulation, about 1cm. to 14 cm. in length. 
Articulations variable in different specimens, 1 cm. to 3 cm. long, very 
solid and compact. Joints long, naked, supporting the ramuli as if on 
petioles. 4 ery fragile, usually faded in colour to an ivory white. 
South Australia, West Australia, Tasmania. 
i 
Amphiroa stelligera (Lamarck) Decaisne. 
= Metagoniolithon stelligera (Lamarck) Weber van Bosse. 
Frond terete, verticillate and trichotomous; ramuli long and umbellately 
branched at almost every joint ; ramelli very slender, joints long or short, 
nodes cartilaginous, articulations all terete ; in the ramuli the articulations 
are thick at the base and apices, in the ramelli very slender and filiform. 
Cystocarps more or less in pairs, large. 
South Australia (Holdfast Bay, Encounter Bay), West Australia, Vic- 
toria (Port Phillip), Tasmania. Common. 
