Fpineuron.] 
IX. ALGA5. 
663 
3-4 in. long, simple or 1-2-pinnate, linear, deeply toothed, transversely 
striate; tips involute when dry. — Harv. Ner. Austr. xxvi. t. 10. Vidalia, 
J. Ag. Sp. Alg. ii. 1127. 
East coast, Colenso ; Bay of Islands, Lyall. 
2. E. ? lineatum, Hook.f. and Harv. FI. N. Z. ii. 223. Frond pink, 
membranous, forked, 4 in. and upwards long ; stem cylindric at the base, 
winged above and passing into the flat frond ; branches 1 in. long, linear, 
ultimate fringed with spreading teeth. — Harv. Ner. Austr. 27. Fucus, Turn. 
Hist. Fuc. t. 201. ? Amansia multifida, J. Ag. Sp. Alg. ii. 1112. 
New Zealand, Banlcs and Solander. — Described by Harvey from the figure in 
Turner’s work ; the plant has been found by no recent collector. J. Agardh refers it doubt- 
fully to a tropical Atlantic plant. 
34. AMANSIA, Lamouroux. 
Frond dull red, flat, membranous, pinnatifid, transversely zoned and 
striate ; midrib evident ; structure of a single layer of oblong hexagonal cells 
of equal length, giving the striated appearance. Conceptacles ovate or glo- 
bose, enclosing a tuft of pyriform spores. Stichidia simple or branched, 
marginal or superficial, containing a double row of tetraspores. 
A small tropical and southern genus. 
1. A. ? marchantioid.es, Harv. in FI. N. Z. ii. 223. Frond in flat 
flabellate patches, 1 in. and upwards across, rooting from the under- surface, 
lobed or pinnatifid; lobes overlapping, ascending, crenate and toothed, 
variable in size, membranous, nerveless, transversely zoned, and with radiating 
striae ; areolate with oblong cells. 
Hawke’s Bay and Cape Kidnapper, on tidal rocks, Colenso . — An immature plant of very 
doubtful genus. 
35. ALSIDIUM, Agardh. 
Frond red, filiform or compressed, cartilaginous, opaque, pinnately or 
irregularly decompound ; axis articulated, of numerous tubular cells, coated 
with cortical layers of uumerous small coloured irregular cells ; branches 
alternate, subulate, acute, transversely striate. Conceptacles containing a tuft 
of pyriform spores, enclosed in a membrane. Stichidia axillary or terminal, 
containing 1 or 2 rows of 3-parted tetraspores. 
1. A. triangulare, J. Ag. ; — FI. N. Z. ii. 223. A native of the West 
Indies ; has, probably erroneously, been said to have been brought from New 
Zealand by Banks. 
36. RYTIPHLCEA, Agardh. 
Frond dull red, usually wrinkled when dry, filiform or compressed, pin- 
nate, reticulate ; axis articulate, of a circle of large oblong cells surrounding 
a central cell ; walls of several series of minute angular cells, the outer 
coloured. Fructification dioecious. Conceptacles ovate, containing a tuft of 
pyriform spores. Stichidia lanceolate, containing 3-partite tetraspores (tetra- 
spores sometimes scattered in the ultimate branchlets). 
