THE MARINE BOTANIST. 257 



pointing in all directions as in that species. Grows 

 attached to rocks and stones, and parasitic on the 

 smaller alg-ae in tide-pools. Annual. Summer. 

 Not uncommon. 



SPYRIDIA. 



Name signifying a basket, in allusion to the form of the 

 receptacles. 



Frond filiform, cylindrical, much branched, 

 ramuli bristle-like, simple, jointed. Fructification : 

 1. stalked, lobed, JavellcB surrounded by short 

 ramuli; 2. external tetraspores, attached to the 

 ramuli. 



SPYRIDIA FILAMENTOSA.-FILAMENTOUS 



SPYRIDIA. 



^^ Stems tufted, many rising from a broadly 

 expanded disk; thick, two to eight inches high; 

 irregularly branched, cartilaginous, densely cellular, 



s 



