Dasya.~\ 
IX. ALGjE. 
673 
in. high, soft and flaccid, terete, inarticulate, glabrous, decompoundly pinnate ; 
pinnae ovate-lanceolate, 2-3-pinnate ; pinnules distichous, subdivided, clothed 
with articulate 1-tubed dichotomous branchlets, which are spreading, subu- 
late, forked, contracted at the joints ; articulations 2-3 times longer than 
broad. — Harv. Ner. Austr. 61. t. 21, young state only. 
From Akaroa, Raoul, southwards. 
2. D. squarrosa, Han. in Fl.N. Z. ii. 232. Fronds crimson, grega- 
rious, 1-2 in. high, distichous, pinnate. Stems articulate, with 7-8 tubes, 
pellucid, except at the base, rough below with horizontal hair-like branchlets, 
smooth above, 1-3-pinnate ; branches alternate, on second or third node ; 
branchlets 3-tubed below, 1-tubed above, short, divaricating, cylindric, ob- 
tuse, simple or forked; articulations of the branches as long as broad, of the 
ultimate longer. 
Stewart’s Island, Port William, Lyall. 
3. D. tessellata, Han. in HI. N. Z. ii. 233. Frond densely tufted, 
crimson-lake. Stems 1-2 in. high, setaceous, pellucid, of about 12 cells 
around the central tube, tessellated with large, transverse, square or oblong 
cells, pinnate or 2-pinnate; branches spreading, penultimate pinnated, with 
alternate, distichous, very spreading, short, dichotomous or pectinate, secund 
branchlets, below 3-tubed ; ultimate 1-tubed, subulate, acute or obtuse, diva- 
ricating, often changed into sessile stichidia. 
Cook’s Straits, Blind and Massacre Bays, Lyall. 
4. D. Berkeleyi, J. Agardh, Sp. Alg. 1179. — Polysiphonia punicea, 
Mont. FI. Antarct. i. 182. Frond red-purple, 4-8 in. long, setaceous, very ir- 
regularly branched, dichotomous or with a percurrent stem and pinnated 
branches, which are usually flexuose and zigzag, all furnished with short alter- 
nate or spirally disposed branchlets T V— g- in. long ; articulations of the 
branches 3 times longer than broad, of the branchlets as long as broad ; tubes 8. 
Conceptacles ovoid, sessile ; stichidia lanceolate. — Polysiphonia punicea and 
Heterosiphonia JBerlceleyi, Mont, in Voy. au Pole Sud, 137 and 128 t. 5. f. 1. 
and 3. P. Berkeleyi, Harv. Ner. Austr. 46. 
Lord Auckland’s group, Ilomhron, J. D. H. (Fuegia, Falkland Islands, Kerguelen’s 
Land.) 
41. POLYZONIA, Suhr. 
Frond parasitic, minute, rose-red, filiform, articulate, much distichously 
branched ; branchlets leaf-like, alternate, flattened, angular, toothed or pecti- 
nate and secund. Stem of many parallel tubular cells. Conceptacles ovoid, 
enclosing pyriform spores. Stichidia lanceolate, pedicelled, supra-axillary, 
often crested, containing one row of large tetraspores. 
Most lovely little Alga, always parasitic on the stems of larger ones, growing in deep 
water, fouud only in the S. temperate and Antarctic zones. 
1, P. cuneifolia, Monlagne ; — FI. N. Z. ii. 226. Fronds creeping by 
a filiform rhizome, articulate. Stems erect, 4-5 in. long, undivided, furnished 
