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THE SEAWEEDS 
Herposiphonia filipendula (Harv.) Falkenberg. 
= Polysiphonia filipendula Harvey. 
Frond very small, 5 cm. or less; long primary frond prostrate, irregu- 
larly branched, ramelli shorter and pectinate, at the apices slightly curved 
inwards, vertical ramelli secund and slender, adult ones longer, finally 
branched ; articulate, with ten siphons. Colour red, adheres to paper. 
West Australia, Victoria. 
HERPOPTEROS Falkenberg. 
Frond dorsiventral, creeping, with irregular rhizines below, regular, 
laterally branched; six-nine central cells, for a long distance devoid of 
cortex. The principal ramuli (sometimes complex, sometimes simple) 
divide laterally into alternately long and short ramuli. Stichidia situated 
in the simple apices of the lateral branches. Tetrasporangia is slightly 
curved rows on the dorsal surface of the stichidia. Cystocarps globose. 
Ilerpopteros fallax Falkenberg. 
The only species, with the characters of the genus. 
Victoria (Port Phillip, Western Port), Tasmania. 
LOPHOSIPHONIA Falkenberg. 
Attachment a disc. Frond creeping, terete, laterally branched, all ramuli 
dorsiventral, with the apices first curled then straight ; ramuli long, 
prostrate, endogenous ; lateral ramuli especially long, with rows of shorter 
ramelli issuing fairly regularly from the dorsum. The shorter ramuli are 
undivided, with penicillate apices. Axis very polysiphonous, central cells 
often numerous, no cortex. Tetrasporangia numerous on the lower or 
middle part of the short ramelli, arranged in straight rows along the 
dorsum, or in broken irr'egular rows. 
Lophosiphonia f neglecta (Harv.) De Toni. 
= Polysiphonia neglecta Harvey. 
Frond about 5 cm. long, very caespitose, spreading over rocks ; primary 
filaments prostrate, secondary ones rising vertically, thinly branched above; 
ramuli erect; articulate. Eight to nine siphoned. Tetrasporangia few on 
the almost unchanged ramelli. 
West Australia (King George Sound), New Zealand. 
Lophosipkonia calothrix (Harv.) De Toni. 
= Polysiphonia calothrix Harvey. 
Frond caespitose, small, dense, growing on rocks; primary filaments 
prostrate, branched ; secondary ones more slender, vertical, simple, 
arranged alternately, glabrous. Articulate 10-12 siphoned. Tetraspores 
sparse on the thick vertical filaments. 
West Australia (King George Sound). 
