82 THE MARINE BOTANIST. 



regularly set with close whorls of fine short haii- 

 like fibres (or ramuli) which curve inwards. 

 Colour a dull olive-green. ^^ In winter/' according- 

 to Dr. Harvey, " these whorled ramuli fall off, and 

 the frond becomes clothed with irregularly disposed, 

 slender (accessory) ramuli, which bear numerous 

 lateral stalked spores." And in summer Mrs. Grif- 

 fiths finds dark-coloured grains imbedded in the 

 withered tips of the ramuli ; the same occurs in the 

 next species, and in the Sphacelaria. Grows on rocks 

 and corallines. Frequent. Summer and winter. 



CLADOSTEPHUS SPONGIOSUS.— SPONGY 

 CLADOSTEPHUS. 



The branches of this species are so thickly set 

 with short bristle-like fibres as to make it appear, 

 when first taken out of the water, like a piece of 

 wet sponge. Colour dull brown or dirty olive- 

 green. Substance rigid; both this and the pre- 

 ceding will require to be gummed on the paper on 

 which it is intended to preserve them. Grows 



