364 
THE SEAWEEDS 
Spyridia ndbilis J. Agardh. 
Frond wide, caulescent, ramuli pyramidal, irregular, verticillate ; stem 
robust, subspongiose, sometimes with decurrent fibres from the upper 
surface of the frond, and sometimes apparently spongiose, covered with an 
outer fibrous covering; ramuli elongate, conspicuously articulate, covered 
with pinnae; the ramelli end at times in terminal fascicles; pinnae some- 
times verticillate around the nodes, the pinnae articulate, mucronate, 
simple. Cystocarps globose, surrounded by a whorl of incurved pinnae. 
South Coast of Australia. 
Spyridia Wilsonis J. Agardh. 
Frond compressed, irregularly pinnate at the margin, pinnellae sub- 
lanceolate above the pedicel, conspicuously attenuated, sublinear, apices 
acuminate, the whole thickly corticate, sparsely branched ; the ramelli 
elongate, filiform, simply acuminate ; articulations more than twice as long 
as wide. 
South Coast of Australia. 
Spyridia squalida J. Agardh. 
Frond terete, very caulescent, below apparently widely branched, the 
ramuli above subdistichous, pinnate, the ramelli attenuated, clavate- 
fusiform, corticate to the apices, incurved and with inner lateral pinnae; 
rachis sub-bifariously branched, the pinnae robust, obtuse, corticate, with 
few cortical cells at the node; articulations of the pinnae shorter than wide; 
from the cortical colls at the nodes the tetraspores are formed, mostly in 
rows on the inner side, sometimes opposite. 
South Australia (Encounter Bay, Eastern Bays), South Africa. 
Spyridia dasy aides Sonder. 
Frond 20 cm. to 25 cm. long, primary frond subcorneous, solid, 
depressed-quadrilateral, distiehously branched, with finer ramelli mono- 
siphonous, articulate, pinnulated, the pinnae densely hirsute, rigid, slightly 
incurved, acute, articulate; articulations as long as wide, nodes purplish; 
ramuli 10 cm. to 12 cm. long, ramelli 5 cm. to 12 cm. long. Cystocarps 
obtuse, three lobed, pedicellate, carried laterally in the ramelli. Colour 
purplish. 
South Australia (Holdfast Bay). 
BRACEBRTDGEA J. Agardh. 
Frond cylindrical, widely and irregularly branched, the lower ramuli 
conspicuously attenuated, the primary ones regular; near the axis the 
siphons are cylindrical, oblong, placed one above the other forming one 
central row; an intermediate layer covers the central siphons very densely; 
the confervoid filaments have long articulations, spread longitudinally and 
together with the united central siphons, are covered with a lime-like sub- 
stance ; outer filaments verticillate, with short articulations, sparsely 
dichotomous, regular ; the ramuli of the filaments free, alternate, the inner 
articulations of the filaments cylindrical ; the terminal ones are obovate. 
