Plate LXXVI. 



Fig. 357. CALOTHPJX PANNOSA. 



Colour. Dark green. 

 Substance. Rigid; wiry. 



Character of Frond. Long, blunt^ very mncli curled and twisted threads 

 [filaments) densely interwoven into compressed tufts, or a sort of 

 honeycombed layer on rocks. Filaments tubular; containing narrow, 

 cylindrical colour-cells, wliich show through, with division-lines. 



Measurement. The filaments \ a,n inch long; the larger spreading. 



Fructification. Minute seeds (zoospores) formed of the colour-cells in the 

 filaments; which cells then separate from each other and drop out. 



Habitat. Roundstone Bay. Kilkee. Sidmouth. On rocks or algse near 

 high-water mark. Rarely observed. 



For other Calothrixes, see Plate LXXYII. 



Fig. 358. LYNGBYA MAJUSCULA. 



Colour. Blackish-green. 



Substance. Crisp; rigid; glutinous. 



Character of Frond. Large tufts or bundles of long, very thick, curling, 

 twisted threads [filaments) issuing from interwoven layers of the same. 

 Filaments not branched, but lying together as if they were; tubular; 

 containing very narrow, cylindrical, dull-green colour- cells, which show 

 through; their division-lines obscure. 



Measurement. Filaments 1 or 2 inches long; the layers indefinitely spreading. 



Fructification. As in Calothrix, &c. 



Habitat. Our coasts generally. On mud or sand-covered rocks at and below 

 half-tide level; also thrown up after storms. Not uncommon. 



By far the largest of British Lynghyas, and like tufts of curling human hair, 

 were it not for the mermaidy colour. 



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