Alge, by W. H. Harvey.) FLORA OF TASMANIA. 317 
Gen. LXXVI. ACROTYLUS, J. 4g. 
(J. Ag. Sp. Alg. vol. ii. p. 192.) 
1. Acrotylus australis (J. Ag. Sp. Alg: ii. p. 193; Harv. Alg. Exsic. n. 330; Phyc. Austr. t. 99). 
Ha». Tasmania, C. Stuart. 
This plant has got the eystocarpic fruit of a Chetangium, to which genus the present is closely allied in habit, 
but has a somewhat different cellular arrangement. The two genera might be united without much violence, 
Tribe IX. HELMINTHOCLADIEE. 
Gen. LXXVII. SCINAIA, Bivona. 
(J. Ag. Sp. Ale, ii. p. 420.—Ginannia, Mont. Harv. Phyc. Brit. t. 69.) 
1. Scinaia furcellata (Bivon.; J. Ag. Sp. Alg. ii. p. 422). —Ginannia furcellata, Mont. ; Harv. 
Phyc. Brit. t. 69; Lond. Journ. vi. p. 407. Ulva furcellata, E. Bot. t. 1881. 
Has. Georgetown, rare, R. Gunn. Derwent, Oldfield. 
Distrip. Native of temperate and subtropical seas, north and south. 
Gen. LXXVIII. LIAGORA, Lamour. 
(Lamour. Polyp. Flex. p. 235. Endl. 3rd. Suppl. p.22. Kütz. Sp. Alg. 537. J. Ag. Sp. Alg. ii. p. 424.) 
l. Liagora viscida (Ag. Sp. Alg. i. p. 395; J. Ag. Sp. Alg. ii. p. 425).—Fucus viscidus?, Turn. 
Hist. t. 119 (exel. syn.). | | 
Has. Georgetown, common. 
Drzsrnrs. Mediterranean Sea. Also in the tropical oceans, east and west. 
Gen. LXXIX. GALAXAURA, Lamour. 
(Lamour. Polyp. Flex. p. 259. Kütz. Sp. Alg. p. 529.) 
]. Galaxaura obtusata (Lamour. Pol. Flex. p. 262; Kütz. Sp. Alg. p. 529). 
Has. Tasmania, Herb. Greville. 
Disrrıg. Tropical and subtropical seas. 
Tees X. RHODYMENIACEE. 
Gen. LXXX. PLOCAMIUM, Zamour. 
(Harv. Ner. Austr. p. 121. J. Ag. Sp. Alg. ii. p. 392. —Thamnophora, Ag.) 
1. Plocamium coccineum (Lyngb. Hyd. Dan. 39. t. 9; Harv. Phyc. Brit. t. 44; Fl. Antaret. i. 
p. 186, and ii. p. 474; Fl. N. Zeal. ii. p. 245; J. Ag. Sp. Alg. ii. p. $95).—Fucus coccineus, Turn. 
Hist. 1.59; E. Bot. t. 1242. 
Var. B. flexuosum, Harv. Ner. Austr. p. 124. t. 43. 
Haz. Sea-shores. 9. In the Tamar, above Georgetown. 
DisrarB. The common form is cosmopolitan. 
Our var. ß, called by Tasmanian collectors “the lace-pattern,” is a very remarkable and beautiful form of the 
species, not found anywhere else that we are aware of than at Georgetown. It forms large globose tufts, the fronds 
lying one on another like the leaves of a book. The branching is pretty regularly dichotomous and fastigiate, the 
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