Plate XLIV. 
Fig. 199. GELIDIUM CORNEUM. 
Colour. Dull purplish-red, becoming pink and yellow on exposure, or in fresh water. 
Substance. Between gristly and horny ; polished. 
Character of Frond. Flat or thread-shaped {filiform)^ very narrow, stiff ; formally branched ; 
the whole at one level, as if cut out. Stems one width throughout ; alternately 
branched ; set with short, simple, wdde-spread branchlets. Branches tapering to 
both ends ; re-branched once or twice, exactly in the same manner as the stems. 
Branchlets mostly opposite, almost horizontally set, always tapering to the base ; 
blunt at the tips, in which the capsular fruit is formed. 
Measurement. From 1 to 8 inches high. 
Fructification. Of two kinds. 1. A mass of spores in oval capsules^ formed in the tips of the 
branchlets. 2. Tetraspores immersed in the same. 
Habitat, Our coasts generally, but shy of the north-east, except the slender, thread-like 
variety, G. crinale. On rocks between tide-marks. Very common. 
Fig. 200. GYMNOGONGRUS GRIFFITHSIJ5. 
Colour. A dull purplish-red, fading to yellow on exposure. 
Substance. Gristly when fresh ; horny when dry. 
Character of Frond. Entangled tufts of slender, wiry threads ; repeatedly forked (dichotomous ') ; 
the tips of one length ; forming a round outline. Branches wavy ; of one thickness 
throughout. Angles of branching (axils) wide and rounded. Divisions often much 
crowded above. 
Measurement. From 2 to 4 inches high. 
Fructification. Only one kind known. Tetraspores forming oblong, wart-like swellings, which 
by degrees surround the stem. (See figure.) 
Habitat. Devonshire. Bantry Bay. Orkney. Isle of Man. On rocks near low-w^ater mark. 
Not very common. 
For another Gymnogongrus see Plate XLVI. Fig. 211. 
Fig. 201. GIGARTINA TEEDII. 
Colour. Purplish ; brighter in fresh water ; fading to purplish-pink. 
Substance. , Membranaceous, but firm ; limp when fresh ; horny when dry. 
Character of Frond. Flat ; narrow ; formally branched ; at one level, as if cut out (distichous). 
Stems either simple or once forked ; set with long, horizontally spread branches, 
tapering to each end, finely pointed ; once or twice re-branched in the same way. 
Branchlets slender, tapering ; the ends often very much drawn out ; last set short, 
thorn-like ; finely pointed ; horizontal. 
Measurement. From 2 to 5 inches long. 
Fructification. A mass of spores in globose capsules ; sessile on the last set of branchlets. 
Tetraspores immersed in the same. 
Habitat. Elberry Cove, Torbay. 
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