Plate LXXX. 



Fig. 379. SPH^ROZYGA CARMICH^LII. 



Colour. The filmy patches vivid green. 

 Suhstance. Gelatinous; slimy. 



Character of Frond. A thin film, consisting of minute, straight, brittle threads 

 {filaments), tapering to each end; unbranched; lying in a layer of jelly. 



Filaments. Formed of bead-like colour-cells; a larger, colourless one (called the 

 connecting cell), fringed with hairs, intermixed here and there. At maturity, 

 some of the colour-cells run together, forming larger ones (a microscopic 

 object). 



Measurement. Patches \, filaments of an inch long! 



Fructification. Minute seeds [zoospores) formed in the enlarged colour-cells, which 

 are then oblong, twice or thrice as long as broad, and brownish. 



Hahitat. Appin. Menai Bridge, &c. On decaying heaps of algse. Also in brackish 

 water. 



Fig. 380. SPH^ROZYGA THWAITESII. 



Colour. Patches deep green; almost black; filaments pale green. 

 Sulstance. Very gelatinous; slimy. 



Character of Frond. Filmy patches, consisting of minute, curved, entangled threads 

 {filaments); unbranched; lying together in a layer of jelly. 



Filaments. Formed of bead-like colour-cells; a larger, lighter-coloured one (called 

 the connecting cell), fringed with hairs, intermixed here and there (generally 

 near the ends). At maturity, some of the colour-cells run together, forming 

 larger ones (a microscopic object). 



Measurement. Patches -f^, filaments of an inch long. 



Fructification. Minute seeds {zoospores) formed in the enlarged colour-cells, which 



are then oval, once and a half as long as broad, and brown. 

 Salitaf. Dolgelly. Shirehampton. On muddy sides of brackish water, or floating. 



Fig. 381. SPERMOSIRA LITTOREA. 



Colour. Deep green. 



Substance. Membranaceous; scarcely gelatinous. 



Character of Frond. A fleecy layer of robust, nearly straight threads { filaments); 

 unbranched; tubular; filled w4th very narrow, closely-packed colour-cells; a 

 rather wider, pale reddish one (called the connecting cell) intermixed here and 

 there. At maturity, some of the colour-cells run together, forming larger 

 ones (a microscopic object). 



Measurement. Fleecy layers J inch long; filaments as fine as human hair. 



Fructification. Minute seeds {zoospores) formed in the enlarged colour-cells, which 

 are then oval and brown. 



Habitat. In muddy, brackish water. 

 85 



