Plate XXI. 



Fig. 91. ECTOCARPUS CRINITUS. 



Colour. When fresh, "bright bay/^ when dried, a dull but rather pleasant 

 green, with a slight gloss. 



Substance. Moderately firm. 



Character of Frond. Tufts of jointed threads [filaments) lying on the mud 

 in extensive fleecy strata. Filaments slightly and distantly branched. 

 Branches long; nearly simple. 



Measurement. Filaments about two inches long. 



Fructification. External seeds [spores) borne on the branches. Spores 

 globose; scattered; unstalked [sessile). Rarely found. 



Habitat. Appin. Capt. Carmichael. Watermouth, Devonshire, Mrs. Griffiths. 

 On muddy sea-shores. Rare. 



rig. 92. ECTOCARPUS PUSILLUS. 



Colour. Pale brown; sometimes drying rather greener. 

 Substance. Soft; delicate. 



Character of Frond. Tufts of jointed threads [filaments)', ^^like pale brown 

 wool.^^ Filaments simple, or slightly and distantly branched; inter- 

 woven. 



Measurement. About an inch long. 



Fructification. External seeds [spores) borne on the filaments. Spores 

 roundish oblong; often two or three together; plentifully scattered. 



Habitat. South coast of England. Parasitical on several of the smaller 

 algae. Rare. 



"A connecting link between the simpler and more branching species 



Almost always found with fruit." — Harvey. 



41 G 



