ALG.E. 



163 



articulated, dissepiments hyaline. Fructification tufted, mostly 

 terminal capsules; (one species inhabits fresh water.) 



Div. III. Ciilorosperme.e. Plants grmoing either in the 

 sea, in fresh water or in damp ground, or in anomalous situations; 

 filamentous, membranaceous, or amorphous; either hyaline, or 

 (owing to the presence of an internal granular sporular mass) 

 of a grass green, very rarely purple colour. Fructification green 

 or purple sporules, either filling the frond, or collected into spo- 

 ridia, rarely situated in external capsules. 



Tribe XIV. Lemanieje. Plants growing in fresh water, 

 filamentous, inarticulate, of a cellular substance. Fronds 

 hollow, torulose at intervals. Fructification tufted, sporules 

 affixed to the inner face of the tubular frond. (Inhabit alpine 

 rivulets, rivers, SfC.J 



57. Lemania. The only genus. 



Tribe XV. Batrachosperme^e. Plants growing in fresh 

 water, filamentous, gelatinous. Fronds composed of aggre- 

 gated, articulate, longitudinal fibres, whorlcd at intervals with 

 short horizontal moniliform ramidi. Fructification : globidar 

 masses, composed of minute, dichotomous, moniliform strings of 

 sporules. 



58. Batrachospermum. The only British genus. 



Tribe XVI. Ch^etophouoide.e. Plants growing in fresh 

 water or in the sea ; filamentous, gclati?ious. Filaments arti- 

 culated, cither free or collected into bundles, bound together by 

 a more or less firm gelatine, thus forming amorphous fronds. — 

 Fructification, minute capsides attached to the ramidi. 



59. Bulbocii.ete. Filaments free, articulated ; each articu- 

 lation bearing at its truncate apex either an elongated, inarti- 

 culate, deciduous seta, or a sessile sphaerical capsule. 



60. Draparnaldia. Filaments free, gelatinous ; stems sub- 

 hyaline, emitting at the joints pencils of coloured ramuli. 



61. Ch^etophora. Filaments collected into amorphous ge- 

 latinous fronds. 



62. Myrionema. Plants exceedingly minute, parasitical, 

 consisting of a mass of simple, clavate, erect filaments, bound 

 together by a firm gelatine. 



Tribe. XVII. Conferve.e. Plants growing in the sea or 

 in fresh water, filameidous, articulate, destitide of distinct 



