594 ALGH NOVA ZELANDIA. 
tomis laciniis angustissimis plano-compressis enerviis, 
vesiculis sphæricis muticis ad basin folii solitariis petio- 
latis, petiolo filiformi compresso, receptaculis levibus cy- 
lindraceis racemosis, pedicellis sepe furcatis. 
Has. Akaroa, M. Raoul. (Also a native of Tasmania.) 
Stem 2 feet or more in length, half a line in width and 
preserving nearly an equal breadth throughout our speci- 
mens, quite smooth, compressed, angularly bent at intervals 
of about an inch ; the branches issuing from the angles, quite 
distichous, zigzag like the stem and emitting from their 
angles a second series of branches, or filiform dichoto- 
mously divided leaves or ramuli. Leaves resembling the 
branches, but smaller, multifid, the segments very slender, 
flat, without midrib. Vesicles generally solitary, either at the 
base of a leaf, or in the interval between two leaves, globose, 
2-4 lines in diameter, muticous, on rather long, compressed pe- 
tioles. This species is allied to S. piluliferum and S. Desfon- 
tainesii, from the first of which its nerveless leaves distinguish 
it, and the nature of the stem from the latter. M. Raoul’s _ 
specimens are the only individuals from New Zealand which — 
| we have seen, and they are not in fruit, but we have thesame ` 
plant from two stations in Tasmania, and have added the 
character of the fruit from one of these. On one of the © 
Tasmanian individuals, the leaves are furnished with distant, — 
prominent warts, pierced by a pore, and containing a tuft of — 
byssoid muciferous fibres. These at first sight may be taken | : 
for the fructification, which is in fact very different. The - 
position of the receptacles is subterminal, and thus there isa 
transition in character to Blossevillea, which renders the dis- 
tinction between that genus and Sargassum very trifling 
- indeed. 
be +Sargassum compactum, Bory, in Duperr. Voy. p. 127. 
Has. New Zealand, Lesson. : 
. 12. +Marginaria Gigas, A. Rich. FI. Nov. Zel. Lt Sargas- ; 
_sum Lessonianum, ib. Sert. Astrolab. p. 137. 
Has. Kaua Kaua Bay, Lesson. 
| r3 13 ns Urvilliana, = Rich, i, c. L 3, 
