286 FLORA OF TASMANIA. [4ige, by W. H. Harvey. 
and H, obconica of Kützing, cannot be kept specifically distinct. The characters attributed to them by authors 
depend partly on age, but chiefly on differences in depth of water, and exposure. H. Sieberi commonly grows in 
tidal rock-pools, and Z7. Banksii and Labillardieri on stones about low water-mark, the latter occurring in deeper 
water than the former. ; 
Gen. X. CARPOGLOSSUM, Kitz. 
(Kütz. Phycol. p. 352; J. Ag. Sp. Alg. p. 192.—Platythalia, Sonder in Bot. Zeit. 1845, p. 51.) 
1. Carpoglossum confluens (R. Br.; Kütz. Phyc. p. 353; J. Ag. Sp. Alg. i. p. 195).—Fucus 
confluens, Tura. Hist. t. 141; Harv. in Lond. Journ. Bot. vi. p. 413. 
Has. Port Arthur, Lyall, W. H. H. Common. 
DisrarB. South coast of New Holland. Port Phillip and Western Port, W. H. H. 
Gen. XI. MYRIODESMA, Dne. 
(Dne. Arch. Mus. ii. p. 148; Endl. 3rd Suppl. p. 29; J. Ag. Sp. Alg. i. p. 191.) 
1. Myriodesma integrifolium (Harv.) ; caule basi terete sursum plus minus alato, costa evanes- 
cente, phyllodiis distichis decomposite pinnatifidis, laciniis enervibus linearibus obtusis margine integerrimis _ 
v. apicem versus minute denticulatis, scaphidiis numerosissimis sparsis. — Harv. Alg. Exsice. n. 48. 
(Tas. CLXXXVI.) 
Has. Georgetown, W. H. H. 
Disrris. Geelong and Western Port, Victoria. 
Frond 1-2 feet long. Stem cylindrical, cartilagineo-coriaceous, branched near the base, its principal divisions 
becoming more and more compressed upwards, then winged, then passing into a lamina traversed by a slender 
midrib which gradually disappears toward the summit. These main divisions are distichously branched, and their 
branches repeatedly pinnatifid, with rounded axils, and are destitute of midrib except toward the base of the prin- 
cipal rachides. The laciniee are 1-2 lines broad, linear, membranaceous, quite entire at the margin, or remotely 
denticulate, especially toward the apices. Scaphidia very numerous, densely scattered over the whole frond. Colour 
olivaceous or foxy.—PraTE CLXXXVI. Fig. 1, the frond, natural size; 2, apex of a fertile lacinia ; 3, section 
through the same and through spore-cavities ; 4, a spore :—the latter figures magnified. 
Gen. XII. SARCOPHYCUS, Kütz. 
(Kütz. Phyc. p. 392; Sp. Alg. p. 587; J. Ag. Sp. Alg. i. p. 189.) 
l. Sarcophycus potatorum (Labill.; Kütz. Sp. Alg. p. 587; J. Ag. Sp. Alg. i. p. 190).—Fucus 
potatorum, Labill. Nov. Holl. p. 119. t. 257; Turn. Hist. t. 243. 
Has. Western and northern coasts. 
Distris. South coasts of New Holland. 
Gen. XIII. SPLACHNIDIUM, Grev. 
(Grey. Syn. p. 36; J. Ag. Sp. Alg. i. p- 186; Kütz, Sp. Alg. p. 585.) ; 
1. Splachnidium rugosum (Grev.; J. Ag. Sp. Alg. i. p. 186; Kiitz. Sp. Alg. p. 585).—Fucus 
rugosus, Linn. Mant. p. 311; Turn. Hist. t. 185; Harv. Phye. Austr. t. 14. 
Has. Tidal rocks, near low water-mark. Georgetown, Gunn, W. H. H., ete. 
Disrris. South and east coasts of New Holland. New Zealand. Cape of Good Hope. 
