Plate XLIV. 



Fig. 199. GELIDIUM COENEUM. 



Colour. Dull purplisli-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, wide-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. 



JSIeasurement. 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 GRIFFITHSI^. 



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. 



3feasure?nent. From 2 to 4 inches high. 



Fructification. Only one kind known. Tetraspores forming oblong, wart-like swel- 

 lings, which by degrees surround the stem. (See figure.) 



Habitat. Devonshire. Bantry Bay. Orkney. Isle of Man. On rocks near low- 

 water mark. Not very common. 



For another Gymnogongrus see Plate XLYI. 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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