672 IX. ALGiE. \_Polysiphonia. 
Austr. 51 ; J. Ag. Sp. Alg. 1046. R. rytiphlceoides, Hook. Lond. Journ. Bot. 
iv. 537. 
Banks’s Peninsula and Otago, Raoul , Li /all. Lord Auckland’s group, Hombron, 
J. D.H. 
25. P. cancellata, Harv. in FI. N. Z. ii. 230. Frond 4-5 in. high, 
robust, shrubby, brownish-black, globose in outline. Stem as thick as pack- 
thread, terete, furrowed, excessively branched from the base ; branches much 
divided alternately, spreading all round ; branclilets tapering, much more 
slender, pinnate or 2-pinnate ; ultimate spinescent ; lower articulations 3 
times, upper twice as broad as long ; tubes 7-8. Conceptacles small, ovate, 
sessile. — Harv. Ner. Austr. 51. t. 15. 
Banks’s Peninsula, Lyall. (Tasmania, Australia.) 
26. P. aterrima, Hook. f. and Harv. FI. N. Z. ii. 230. Frond 4-5 in. 
high, black when dry, rather rigid. Stem setaceous, furrowed, articulate, 
naked below, decompoundly branched above, scarcely dichotomous, narrowed 
to the apex ; branches attenuate or secund, obovate in outline ; branchlets 
distant, erect, subulate ; axils acute ; articulations all very short; tubes 9-10, 
oblong, hexagonal. Conceptacles sessile, scattered, ovoid-globose, obtuse. — 
Harv. Ner. Austr. 52 ; J. Ag. Sp. Alg. 1050. 
Parasitical on Fuci, abundant, Colenso, etc. 
27. P. ramulosa, Harv. in Fl.N. Z.ii. 230. Frond 1 in. high, black- 
ish, flabel lately branched. Stem as thick as horsehair, divided from above 
the base into numerous alternate branches, which are erect, close-set ; branch- 
lets numerous, spreading, subulate, simple or again branched, 1 d 5 — in. long ; 
tips all acute; articulations all about half as long as broad; tubes 7. 
Parasitic on Sargassa; Parimahu, Colenso. 
28. P. nigrescens, Grev.; — FI. N. Z. ii. 231. Frond robust, bushy, 
6 in. high, dark brown, rigid below. Stem setaceous, rough below with 
broken off branches, excessively branched above ; branches flaccid, somewhat 
distichous, repeatedly pinnate, obovate in outline ; pinnules elongate, distant, 
alternate, subulate, the upper again pinnate at their tips ; lower articulations 
short; upper longer; tubes 16. Conceptacles ovoid, sessile. — Harv. Ner. 
Austr. 44; Phyc. Britt. 277 ; J. Ag. Sp. Alg. 1057. 
New Zealand, Raoul. (Atlantic and Baltic Oceans.) 
40. DASYA, Agardh. 
Frond red, filiform or compressed, dendroid ; axis articulate, of many ra- 
diating cells surrounding a central cavity, the whole coated with still smaller 
cells ; branchlets articulate, 1-tubed. Conceptacles ovate or urceolate, with 
pyriform spores. Stichidia lanceolate, on the branchlets, containing transverse 
rows of tetraspores. 
Very beautiful bright red seaweeds, natives chiefly of the temperate zones. 
1. D. collabens. Hook. /. and Harv. FI. N. Z. ii. 222. Frond 1-12 
