Alge, by W. H. Harvey.] FLORA OF TASMANIA. 293 
Has. Georgetown, R. Gunn, W. H. H. (Often on Zostera.) 
Distris. Western Port, Victoria, W. H. H. 
Frond 1-2 feet long, simple, with a few lateral simple branches, each several inches or upwards of a foot in 
length, and either quite naked or furnished with a few distant lesser branches irregularly distributed. The walls of 
the frond are composed of three or four rows of longitudinal, closely agglutinated filaments, At first the cavity is 
small, but finally it widens. The peripheric filaments are subfasciculate, irregularly forked or laterally branched ; 
their articulations are cylindrical, and longer than their diameter; the terminal cell is globose, and of larger dia- 
meter than the rest, so that each fibre is capitate.—After having been dried, the tube in some cases remains perma- 
nently collapsed, but in others it freely opens, a difference perhaps depending on maturity. 
Gen. XXXI. LEATHESIA, 8. F. Gray. 
(Gray, Br. Pl. i.p. 301. Endl. 3rd Suppl. p. 23. Harv. Phyc. Brit. t. 176. J. Ag. Sp. Alg. i. p. 50. 
Kütz. Sp. Alg. p. 543.) 
1. Leathesia tuberiformis (S. F. Gray, Br. Pl. i. p. 301; Harv. Phyc. Brit. t. 324).—L. marina, 
Endl. 9rd Suppl. p. 23; Kütz. Sp. Alg. p. 543; J. Ag. Sp. Alg. i. p. 52. Rivularia tuberiformis, Lug. 
Bot. t. 1956. 
Has. Rocks: at the mouth of the Tamar, etc. 
Disrrrs. Atlantic shores of Europe and America, Cape of Good Hope, south coast of New Holland. 
Gen. XXXII. MYRIONEMA, Grev. 
(Grev. Crypt. Fl. t. 300. Endl. 8rd Suppl. p. 23. J. Ag. Sp. Alg. i. p. 47.) 
1. Myrionema Leclancherii (Chauv. ; Harv. Phyc. Brit. t. 41 A; J. Ag. Sp. Alg. i. p. 48).— 
Phyllactidium maculeforme?, Kitz. Phyc. p. 295. 
Haz. On Uwe: at Georgetown; parasitic. 
DisrarB. Atlantic shores of Europe, etc. 
Gen. XXXIII. CLADOSTEPHUS, 4g. 
(J. Ag. Sp. Alg. i. p. 41. Harv. Phyc. Brit. t. 33. 138. Kiitz. Sp. Alg. p. 468.) 
1. Cladostephus spongiosus (Ag. Sp. p. 12; Harv. Phyc. Brit. t. 138; Hook. fil. Fl. Antarct. 
y. 163; J. Ag. Sp. Alg. i. p. 43). 
Has. Tasmania, C. Stuart. 
Distrıs. A native of Europe, North and South America, and of the south coasts of Australia, etc. 
Trise VI. ECTOCARPACE. 
Gen. XXXIV. SPHACELARIA, Lyngb. 
(Lyngb. Hyd. Dan. p. 103. J. Ag. Sp. Alg. i. p. 29) 
1. Sphacelaria paniculata (Suhr; J. Ag. Sp. Alg. i. p. 36).—S. hordeacea, Haro. in Hook. Ic. 
Pl. t. 614. Stypocaulon paniculatum, hordeaceum, et virgatum, Kútz. 
Has. Coast rocks, common: Georgetown, Port Arthur. 
Disrarn. Coasts of New Holland and New Zealand, Cape of Good Hope. 
VOL. II. 4r 
