184 
THE SEAWEEDS 
Melanthalm concinna (R. Brown) J. Agardh. 
Frond filiform, little compressed; height 10 cm., width 1 mm. Colour 
reddish. 
South Australia (Encounter Bay, Eastern Bays) and Victoria. 
Fig. 52 .— Melanthalia concinna. 
CURDIEA Harvey. 
Frond flat, coriaceous-cartilaginous, with broad and narrow laciniae, com- 
posed of two strata, the medullary of roundish-angular cells, the cortical of 
very minute, sub-vertieally seriated coloured cellules. Cystocarps marginal, 
globose, sessile, containing, within a very thick pericarp, minute spores 
arranged in spore-threads issuing from a large fleshy placenta. Tetra- 
sporangia in superficial intramarginal warts (nemathecia), cruciately 
divided. 
Curdiea laciniata , Harvey. 
Frond 30 cm. to 60 cm. high, thick, fleshy-coriaceous, divided very irregu- 
larly into broad and narrow ribbon-like laciniae; from cm. to 2| cm. in 
width, parallel or palmatifid; the apices blunt or jagged. Cystocarps con 
spicuous, about 1 mm. across. Colour red or liver-coloured. 
South Australia (Encounter Bay, Eastern Bays), and Victoria, common; 
rare in Tasmania. 
