CHARJE AUSTRALES ET ANTARCTICA. 199 
10. N. leptostachys; monoica; caule tenuiore; verticillis sterilibus 
remotis, e foliis elongatis supra medium furcatis, segmentis pluri- 
artieulatis; verticillis fertilibus minimis, in spicas elongatas basi 
interruptas gelatinosas congestis, e foliis 6—8 prope basin divisis, 
radiis nonnullis iterum 3—4-furcatis, segmentis plerumque triarti- 
culatis obtusiusculis; antheridiis in divisione primaria, seminibus in 
secundaria solitariis, coronula rare fasciis. . 
Swan River (Drummond No. 6, in herb. Hook. 
This species is more Knee ‘than i peus. enf glæostachys, 
differing from both by the l l spikes, and the 
moneecious fructification. It is invested like these species by a jelly- 
like covering, giving to it, in the living state, a beautiful iridescent ap- 
pearance. The specimens are wanting in completely ripe seeds. 
1l. N. Hookeri ; monoica ; verticillis laxis, inferioribus remotis, superi- 
oribus in capitula laxe comosa congestis, e foliis 6-8 medio vel infra 
medium 2—3-furcatis, radio uno plerumque iterum diviso, segmentis 
ultimis elongatis ex articulis 3, primo elongato, reliquis abbreviatis 
et angustatis, mucronem acutum bicellularem formantibus ; seminibus 
plerumque geminatim congestis, coronula brevi obtusa fasciis cir- 
iter 9. 
Chara australis, Tayl., in herb. Hook. 
In a little lake on Kerguelen's Land, collected in 1840 by Dr. Hooker. 
Besides this in Sir W. Hooker’s herbarium there is a somewhat stronger 
sterile form, with simply divided leaves from New Zealand, collected by 
Mr. Colenso. 
This species agrees in habit with N. mucronata of the middle and 
north of Europe, differing, however, by the swollen mucrones of the 
leaves. The dark red-brown or black-brown nut of the seed is about 
.42 m. long. 
Subgenus B. TOLYPELLA. 
a, ace tricuspidate, segmentis foliorum ex articulo elongato impo- 
is pluribus mucroniformibus. 
The species id this division known to me belong to South Africa, ex. gr. N. Drè- 
geana, À. Br. 
b, Tolypelle caudate, segmentis ex articulis pluribus elongatis, sensim 
decrescentibus. 
uropean species of this section are to be mentioned N. fasciculata, PE 
Vin; Ziz., glomerata, Desv., nidifica, Müller. ON the latter is nearly alli 
