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THE SEAWEEDS 
III. — Fronds terete or plane and two-edged, central axis articulate and 
corticated with rhizoids, and with verticillate ramelli. Cystocarps variously 
placed on the ramelli. 
Dasyphileae. Gonimoblasts evolved successively from many round 
gonimolobes. Tetrasporangia triangularly divided. 
IV. — Fronds terete or complanate, or confervoid, with branches covered 
with abundant short ramuli, or with a central articulate axis and corticated 
with much branched laterally confluent filaments. 
Crouanieae. Gonimoblasts evolved successively from many gonimo- 
lobes. Tetrasporangia triangularly or cruiciately divided. 
V. — Fronds terete or complanate, with a central axis totally or partly 
corticated with cells, mostly internally, some externally. Cystocarps invo- 
lucrate, ramelli not concomitant. 
Spyridieae. Fronds terete, branching in all directions, with a central 
axis of large cells. Cortex continuous or locally interrupted. 
Cystocarps on short ramuli, terminal, primarily bilobed, eventually 
irregularly three to many lobed. Tetrasporangia triangularly 
divided. 
Geramieae. Frond terete or compressed, sometimes (when parasitic) 
pulvinate, furcately branching, apices often involute, central axis 
of large cells. Cortex continuous or confined to the nodes. Cysto- 
carps lateral or terminal, with involucrate ramelli. Tetra- 
sporangia triangularly (and also cruciately?) divided. 
Subfamily Spermothamnieae Schmitz. 
LEJOLISIA Bornet. 
Frond filiform, articulate, monosiphonous, glabrous, filaments radiating, 
irregularly branched ; vertical filaments sparsely branched, emitting short 
fertile ramuli, often opposite at the base. Cystocarps carried in the lateral 
terminal ramuli, formed from changed apical cells, gelatinous, attached 
firmly to the articulations of the ramuli. Antheridia oblong, conical, 
covered with a thin external skin. Tetrasporangia in the terminals of the 
short lateral ramuli, formed from changed apical cells; obovate, glabrous, 
triangularly divided. 
Lejolisia aegagropila J. Agardh. 
Frond globose, caespitose ; filaments radiating from the base, simple 
below, fastigiate, branched above. The ramuli erect and patent, arcuate, 
here and there subsecund; the ramuli bearing tetrasporangia are unicel- 
lular, opposite or subsecund, very short, arcuate, erect, carrying tetraspores 
at the apices. 
South Coast of Australia. 
