334 
THE SEAWEEDS 
Callithamnion longinode Harvey. 
Frond very slender, pellucid, articulate, irregularly dichotomous, sub- 
fastigiate, with acute axils, apices attenuated; articulations many times 
longer than they are wide, cylindrical. 
Victoria (Warrnambool) . 
Callithamnion ovuligerum Asken. 
Frond epiphytic, ecorticate, the ramuli regular, with filaments at the 
articulations, or verticillate, shortly articulate; ramelli unicellular, ellip- 
soid, or ovate. Tetrasporangia carried singly on the primary articulations 
of the ramuli, sessile. Cystocarps on the primary filaments, acrogenous, 
the young ones involute on the filaments of the ramuli, the fully developed 
ones naked and divided into many sections. 
South Australia (Holdfast Bay). 
Subfamily Spongoclonieae Schmitz. 
KEY TO THE GENERA. 
a. Fronds terete Spongoclonium 
Sonder. 
aa. Fronds complanate Halopl'egma 
Montagne. 
SPONGOCLONIUM Sonder. 
Frond erect, terete, irregularly branched; ramuli densely spongiose, the 
central axis thickened with rhizoids, ecorticate, articulate, alternately 
laterally branched; ramuli are so branched from the external side that 
they curl over the axis, forming a thick covering. Cystocarps numerous, 
scattered over the surface of the frond and hidden with a covering of fine 
hairs. Tetrasporangia shortly pedicellate, triangularly divided, solitary or 
in rows. Antheridia thyrsoid. 
Spongoclonium fasciculatum J. Agardh. 
Frond wide, caulescent, alternately irregularly branched ; ramuli simple, 
ascending patently, spongiose, fasciculate, alternate, short, almost attached 
to the rachis ; terminal ramelli of the fascicles conspicuously incurved and 
thick. Cystocarps numerous, within the fascicles, subconfluent, in a con- 
spicuous cluster. 
Victoria (Port Phillip). 
Spongoclonium brounianum (Harvey) J. Agardh. 
Fronds 8 cm. to 10 cm. high, caulescent, radical from basal articuli of 
branches, totally stupose and everywhere shaggy ; ramelli covered with 
continuous coalescing strata, irregularly pinnate, pinnae spreading to all 
sides, apices sub corymbose ; lower pinnules patent, subulate, upper 
extremely incurved ; articulations of branches of equal dimensions, of 
ramuli longer than broad. Cystocarps nidulating within corymbs of 
ramelli. Tetrasporangia on lateral pinnules, sparse, shortly pedicellate. 
South Australia (Sturt Bay), West Australia. 
