ALGÆ TASMANICÆ. 413 
Series II. MELANOSPERME&, or FUCOIDEÆ. 
Fam. 1. Fucex. 
104. Scaberia Agardhii, Grev. (1830).—Castraltia salicor- 
nioides, Rich. (1834.) 
Has. Abundant on rocks, near low water mark at George 
Town, Mr. Gunn. (1349 ) 
105. Phyllospora comosa, Ag. 
Has. George Town, Mr. Gunn. 
106. Hormoseira Billardieri, Mont. — Fucus moniliformis, 
Labill. t. 262. : 
Has. George Town, Mr. Gunn.—We fear that authors make 
too many species in this genus. 
107. Seirococcus axillaris, Grev.—Fucus axillaris, Turn. t. 
146. 
Has. George Town, Mr. Gunn. 
108. Xiphophora Billardieri, Mont.—Fucus gladiatus, Labill. 
Has. Port Arthur, Dr. Jeannerett and Dr. Lyall. 
109. Fucus confluens, Br. () — Turn. t. 141. - 
Has. Tasmania, Dr. Lyall.—A single very imperfect spe- 
cimen, which we refer to this species with some doubt. 
110. Sargassum paradoxum, nobis.—Fucus paradoxus, Turn. 
t. 156. Cystoseira paradoxa, Ag. | i 
Has. George Town, Mr. Gunn. Very common.—This 
Plant is paradoxical in many ways. Its male receptacles, 
represented in Turner's figure, are cylindrical and smooth, 
and larger than the females, which are three-angled, the 
angles armed with conical protuberances. Mr. Gunn's spe- 
«mens are numerous, and in a very perfect state, other- 
"Wise we should not venture to refer those which bear 
Such opposite-looking receptacles to one species, and we = 
Cannot help fearing that too much stress has been laid on © 
` the form of the receptacles in the Sargassa. = 
-HL Sargassum Raoulianum, nobis in Lond. Journ. 4 
... Haz. Sandy Cove, Dr. Lyall and Dr. Hooker. ` 
