122 THE MARINE BOTANIST. 



finds on the beach at Exmouth a variety of this 

 plant^ which bears much resemblance to Rytiphlaea 

 complanata, and is identical with the so-called 

 Mediterranean species P, pennata. 



DASYA. 



Name hairy, in allusion to the slender hair-like ramuli. 



Frond filamentous 5 the stem and branches 

 mostly opaque, composed internally of numerous 

 parallel tubes, surrounding a central cavity ; the 

 ramuli jointed ; single tubed. Fructification two- 

 fold, on distinct plants; 1, ceramidia, containing 

 a tuft of pear-shaped spores; 2, lanceolate pods 

 {stichidia) containing tetraspores. 



DASYA COCCINEA.— SCAELET DASYA. 



Stems rather rigid and firm, minutely hairy; 

 set with alternate or opposite twice -pinnated 

 branches, bearing tufts of many-tipped ramuli. 

 Substances rather cartilaginous, and not adhering 

 very firmly to paper. Colour dark red, becoming 



