Plate LXXX. 
Fig. 379. SPH^ROZYGA CARMICH^LII. 
Colour. The filmy patches vivid green. 
Substance. 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 J, 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. 
Habitat. Appin. Menai Bridge, &c. On decaying heaps of algae. Also in brackish water. 
Fig. 380. SPH^ROZYGA THWAITESII. 
Colour. Patches deep green ; almost black ; filaments pale green. 
Substance. 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 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. 
Habitat. 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 with 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. 
