Alga, by W. H. Harvey.) FLORA OF TASMANIA, 209 
Disrris. New Zealand and Cape of Good Hope. 
2. Bostrychia distans? (Harv. in Fl, N. Zeal. ii. p. 226). 
Haz. In the Derwent, at New Norfolk, Gunn. Rivers in New Zealand. 
If this be not identical with the New Zealand species found in similar localities, it is at least nearly allied to 
it. Our specimens are not in good order. 
3. Bostrychia Harveyi (Mont. Fl. Chil. Cell. ii. p. 307. t. 16.1.4; Hook, Fl. N. Zeal, ii. p. 225). 
Has. Tasmania, C. Stuart. 
Disrerp. A native of Chiloe and of New Zealand. Closely allied to the B. scorpioides of Europe, 
but more slender. 
Gen. XLIX. POLYZONIA, Suhr. 
(Suhr in Flora, 1834, p. 739. Harv. Ner. Austr. p. 70. Kiitz. Sp. Alg. p. 881.) 
1. Polyzonia incisa (J. Ag. in Linn. xv. p. 24; Harv. Ner. Austr. p. 71). 
Has. Parasitical on various 4/92. 
Gen. L. POLYSIPHONIA, Grev. 
(Grev. Fl. Edin, p. 308, Harv. Ner. Austr. p. 87. Kütz. Sp. Alg. p. 802.) 
SuncENUs 1. OLIGOSIPHONTA, J. Ag. 
1. Polysiphonia Hookeri (Harv. Ner. Aust. p. 40. t. 12).—P. acanthophora, Harv. in Lond. 
Journ. Bot. iii. p. 441. 
Haz. Georgetown, abundant, 
2. Polysiphonia Mallardiz (Harv. Ner. Austr. p. 40. t. 13). 
Has. Georgetown. Coast of New Holland. 
3. Polysiphonia Hystrix (Hook. fl. et Harv.; Harv. Ner. Austr. p. 41. t. 14). 
Has. Georgetown, etc. Coast of New Holland. 
4. Polysiphonia breviarticulata (J. Ag. Alg. Medit. p. 135; Harv. in Ner. Bor. Amer. ii. 
p. 36. t. 16 2. ; Trans. R. I. Acad. xxii. p. 539). 
Has. Pipers River, R. Gunn. Native of Europe and North America. 
5. Polysiphonia abscissa (Hook. fil. e& Harv.; Fl. N. Zeal. ii. p. 227).—P. abscissa and P. mi- 
crocarpa, Fl. Ant. et Harv. Ner. Austr. 
Haz. Georgetown, R. Gunn, W. Archer. Native of Antarctic Sea and New Zealand. 
The Tasmanian specimens are larger and somewhat coarser and duller in colour than those from the Antarctic 
Sea, but the differences do not seem to warrant their specific separation. The species represents P. formosa 
and P. urceolata in the Southern Ocean, and is probably as variable as those forms are well known to be. 
6. Polysiphonia mollis (Hook. fìl. et Harv.; Harv. Ner. Austr. p. 43). 
Has. Georgetown, on Zostera ; common. South coast of New Holland. 
7. Polysiphonia crassiuscula; fuscescens, cartilagineo-succosa, siccitate subrigida, rugosa, fronde 
ultrasetacea sursum maxime attenuata pluries dichotoma, axillis patentibus, ramis minoribus irregulariter 
dichotomis nudis v. ramulis paucis lateralibus plus minus obsitis, axi tetrasiphonio, articulis superioribus 
diametro zqualibus v. sublongioribus ecorticatis, inferioribus diametro brevioribus plus minus dense 
corticatis. 
