CHARGE AUSTRALES ET ANTARCTIC^E. 199 



10. N . leptostachys ; monoica; caule tenuiore ; verticillis sterilibus 

 remotis, e foliis elongatis supra médium furcatis, segmentis pluri- 

 articulatis ; 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 obtusiuscula, fasciis. . . . 



Swan River (Drummond No. 6, in herb. Hook.) 



This species is more slender than N. gelatinosa and glœostachys, 

 differing from both by the more elongated and interrupted spikes, and the 

 monœcious fructification. It is invested like thèse species by a jelly- 

 like covering, giving to it, in tlie living state, a beautiful iridescent ap- 

 pearance. The spécimens are wanting in completely ripe seeds. 



11. N. Hookeri ; monoica; verticillis Iaxis, inferioribus remotis, superi- 

 oribus in capitula laxe comosa congestis, e foliis 6-8 medio vel infra 

 médium 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- 

 citer 9. 



Chara australis, Tayl., in herb. Hook. 



In a little lake on Kerguelens Land, collected in 1840 by Dr. Hooker. 

 Besides this in Sir W. Hooker's herbarium there is a somewhat stronger 

 stérile form, with simply divided leaves from New Zealand, collected by 

 Mr. Colenso. 



This species agrées 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 

 A2 m. long. 



Subgenus B. Tolypella. 



a, Tolypellœ tricuspidatœ, segmentis foliorum ex articulo elongato impo- 

 sitis pluribus mucroniformibus. 



Tbe species of this division known to me belong to South Africa, ex. gr. N. Dre- 

 geana, A. Br. 



b, Tolypellœ caudatœ, segmentis ex articulis pluribus elongatis, sensim 

 decrescentibus. 



Of European species of this section are to be mentioned N. fasciculata, Amici, 

 proliféra, 7àl., glomerala, Desv., nidifica, Millier. To the latter is nearly allied 



