314 FLORA OF TASMANIA. [Alge, by W. H. Harvey. 
Has. Southport, C. Stuart. 
Disrrib. Coast of Victoria. ` 
More slender than P. Labillardieri, with flatter, less distinetly-ribbed branches, and readily known, when in 
fruit, by the position of the nemathecia, which are sessile near the tips of the marginal pectinate teeth or lacinula. 
The Tasmanian specimens are not so broad as those from Victoria, and are more deeply inciso-pectinate, but they 
perfectly agree in the more important characters of the fructification. 
Trise VI. SQUAMARIEZ. 
Gen. LXX. PEYSSONNELIA, Dene. 
(Dene. Pl. Arab. p. 168. Endl. 3rd Suppl. p. 38. Kütz. Phyc. p. 384. J. Ag. Sp. Alg. ii. p. 499.) 
1. Peyssonnelia rubra (J. Ag. Sp. Alg. ii. p. 502).—Zonaria rubra, Grev. in Lin. Trans. 15. ii. 
p- 940. P. orbicularis, Kútz. Phyc. p. 385. 
Has. On stones: at Georgetown. 
Distrrs. Mediterranean. Pacific Ocean. 
I have ventured to refer the Van Diemen's Land specimens to P. rubra, a species of the Mediterranean, from 
which perhaps a more accurate examination of authentic specimens would separate them. The general habit of our 
Tasmanian species is that of .P. rubra, but the size is greater, and the substanee less thin and delicate. I also 
found this plant at Rottnest Island, W. Australia, and in Port Jackson, and have received it from the coast of Vic- 
toria, from Dr. Curdie. It is very distinct from P. australis, Sond., and P. Nove-Hollandie, Kütz. 
2. Peyssonnelia australis (Sond.) ; “ frondibus aggregatis basi adnatis estipitatis coriaceis coccineo- 
purpureis (demum virescentibus) integris vel obtuse sublobatis obsolete zonatis subtus pallidis radiculis 
tenuissimis tomentosis versus marginem glabris, verrucis fruetiferis sparsis (non zonatim dispositis) pur- 
pureis.”—Sond. in Linn. xxv. p. 685 ; Harv. Alg. Austr. Éxsicc. n. 328! Harv. Phye. Austr. t. 81. 
Has. Tasmania, C. Stuart. 
DisrRrB. Native of the coast of Victoria, Y. Mueller, W. H. H. 
Fronds 4 inches long and 5 inches wide, thick and coriaceous, flabelliform, either undivided or cut into two 
or three shallow lobes, emitting from the under-surface, toward the base, several scattered, stout roots, and densely 
elothed over the greater part of the inferior surface with a pale-brown or fulvous tomentum. A broad, glabrous 
margin extends round the frond beneath the apices of the lobes. The upper surface is smooth, and marked with 
concentric zones; the margin thin, and frequently revolute. The colour is a deep blood-red, darker toward the 
base. The substance of the frond is singularly thick and leathery. 
Triss VII. GELIDIACEA. 
Gen. LXXI. GELIDIUM, Lamour. 
(J. Ag. Sp. Alg. vol. ii. p. 466. Fl. N. Zeal. ii. p. 243.) 
l. Gelidium corneum (Lamour ; Harv. Phyc. Brit. t. 53; J. Ag. Sp. Alg. ii. p. 469; Kiitz. Sp. 
Alg. p. 764).—Fucus corneus, Turn. Hist. t. 257. 
... Has. On tidal rocks. | 
Dism. Cosmopolitan. 
| We ye not seen any specimens of the ordinary form, but the varieties cespifosa and erinalis are common on 
stones between tide-marks, at Port Arthur, and probably in other suitable localities. 
D 
