ALG.E. 10o 



articulated, dissepiments hyaline. Fructification tufted, mostly 

 terminal capsules; (one species inhabits fresh water.) 



V 



Div. III. CHLOROSPERME.E. Plants growing 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 info spo- 

 ridia, rarely situated in external capsules. 



/ 



TRIBE XIV. LEMANIE;E. 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, fyc.J 



57. LEMANIA. The only genus. 



s 



TRIBE XV. BATRACHOSPERME.E. Plants growing in fresh 

 water, filamentous, gelatinous. Fronds composed of aggre- 

 gated, articulate, longitudinal fibres, whorled at intervals with 

 short horizontal moniliform ramuli. Fructification : globular 

 masses, composed of minute, dichotomous, moniliform strings of 

 sporules. 



58. BATRACHOSPERMUM. The only British genus. 



TRIBE XVI. CH^ITOPHOROIDE^;. Plants growing in fresh 

 water or in the sea ; filamentous, gelatinous. Filaments arti- 

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

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

 Fructification, minute capsules attached to the ramuli. 



59. BULBOCHJETE. 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^TOPHORA. 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, filamentous, articulate, destitute of distinct 



