272 
THE SEA WEE DS 
lxl. Tetraaphanous. Cystoearpa with a one- jointed pedkrd. nearly 
spherical. 170 c diameter Heigh: about 1 cm. Colour vkdaceous. 
Lord Howe Lsland. 
PcAysipkonia rutUans Kutzmg, 
Kutz, Tab. Phye. XIII De Toni Syll. Alg. IV.. 951- 
Frond densely eaespitose, intricate, prostrate, eeortieate; branches 
remote, alternate. Articulate, tetrasiphonous, articulations as long as broad, 
siphons subutrieulate. Colour golden-black. 
Australia. Little known. De Toni queries whether this species should 
not be placed under bophosiph onia . 
Polysiphonia amoena Sender. 
Kutz. Tab. Phye. XIV. (1861), p. 13, t. 40: De Toni SylL Alg. IV., 959. 
Fronds erect, 4-7 cm. long., much branched, branches erect apices 
corymbose-f ast igia t e. T etras i phonous. Articulate, lower articulations 3-4 
times as long as broad. 
Victoria Port Phillip). 
Subgenus Polysiphonia. 
Siphous primarily six or more. 
A. Fronds pellueidly articulate. 
III. — CANCELLATAE. 
Siphons usually seven, rarely eight or nine. Fronds dark, drying darker, 
furrowed, bushy, vaguely branched. Ramuli irregular. 
Poly siphon iu forcipata Harvey. 
(Syn P. forfex Harvey.) 
Harvey Phye. Aus. pi. 96: De Toni Syll. Alg. IV.. 920. 
Fronds erect, solitary or two or three together, but not densely rafted, 
4-8 cm. high, about \ mm. to \ mm. thick, repeatedly and fairly regularly 
dichotomous : in old specimens only lateral branches may be dichotomous ; 
smaller branches regularly forked, with the tips of the ramuli acute and 
approaching each other in pail's, like the arms of scissors. Frond pellueidly 
articulate, the articulations shorter than broad in all parrs of the frond. 
Siphous five (six according to Harvey), lateral view quadrate. Tetra* 
sporangia in lateral cells of corymbose ramuli. prominent. Cysrocarps 
sessile or nearly so, lateral, at some distance below the last ramifications; 
very broadly ovate, somewhat broader than long, surface laxly areolate. 
Colour when growing a pale reddish-grey, more or less tinted with red; 
when dry, either red-brown or blackish. Substance firm, cartilaginous. 
Adheres weakly to paper. 
Western Australia Rottnest Island. Garden Island. King George Sound 
— epiphytic on Zostera and smaller algae . Tanega Island. Eastern Archi- 
pelago. 
