684 
IX. ALGA!. 
\JIeinineara . 
crisped and waved ; costa running through the principal part of the frond, 
not branching to the lobes, which have isolated costae of their own ; principal 
costa emitting numerous minute lanceolate leaflets. 
Massacre Bay, Lyall. 
55. NITOPHALLUM, Greville. 
Characters of Delesseria, but no midrib, or an obscure one confined to the 
base of the frond. 
A genus of most beautiful Alga, which are abundant in the colder zones, and arrive at 
their greatest stature and beauty in the deep southern bays. 
§ 1. Sori subsolitary below the apices of the segments. 
1. N. minus, Sond. ; — FI. N. Z. ii. 119. Frond small, tufted, sessile, 
excessively delicate, 1-2 in. long, bright rose-red, linear, dichotomously pin- 
nate from the base, quite entire, traversed by a few very slender longitudi- 
nal veins ; branches divaricate, short, obtuse, upper dichotomous, multifid, 
ultimate obtuse. Sori towards the tips of the segments. — Harv. Ner. Austr. 
119. Cryptopleura, J. Ag. Sp. Alg. ii. 655. 
Parasitic, East coast, Colenso ; Tauranga, Davies. (Australia.) 
2. N. uncinatum, J. Ag. ? ; — FI. N. Z. ii. 241. Fronds small, tufted, 
on a creeping rhizome, delicately membranous, sessile, 1-2 in. long, subpin- 
nately dichotomous from the base, wholly veinless ; segments linear, ^ in. 
broad, upper acuminate, often secund ; fruiting ones shorter, often 3-folio- 
late. Sori solitary towards the tips of the segments. — J. Ag. Sp. Alg. ii. 
654. 
Blind Bay, Cook’s Straits, Lyall. (Europe.) — Not found in fruit, and hence doubtful. 
§ 2. Sori more or less intramarginal. 
3. N. palmatum, Harv. in FI. N. Z. ii. 240. Frond red-brown, 
thickish, 6-8 in. long and more, broadly cuneate at the base, and then nar- 
rowed into a thickened but not costate stipes 1-2 in. long, above palmately 
divided into many cuneate erect segments with narrow axils ; costa 0, but 
whole frond traversed with microscopic veinlets ; larger segments cuneate, 
dichotomously palmate, smaller oblong, obtuse, quite entire. Sori oblong, 
often elongate, usually in interrupted lines towards the apex, but continued 
downwards within the margin, often irregularly scattered. 
Eastern coasts, Colenso and Lyall, apparently common. — The ordinary form strongly re- 
sembles Rhodymenia palmata, but Harvey enumerates many varieties, some crisped, some 
rose-red, some with pinnatifid lobes, aud some with proliferous margins. 
§ 3. Sori scattered over the whole surface of the frond or its segments. 
f Frond nerveless. 
4. N. punctatum ?, Grev. ; — FI. Antarct. 185. Frond subsessile, 
delicately membranous, rose-red, nerveless, very variable in size and shape, 
dichotomously fastigiate or dilated and pinnate or palmate '; axils rounded. 
