:97a 



XrV. ALG^. 



4L 



(Edogonium vesicaium. 



Zoospores furnislied with 



a crown of hairs. (Thuret.) 



(Edogoni-um ciliainm. 

 Two cells or sporangia, in 

 each of which is formed a 



zoospore (mag. 200). 

 (Pringsheim.) 



M, two sporangia, on which 

 are fixed the, antheridia, ad ; 

 a, antheridium, of which the 



lid is removed ; st, terminal 

 bristle. 



(Edogonium. 

 Joint opening to give 

 passage to a zoospo:c. 



Chcetophora eUgans. 



Branches producing a zoospor 



n each ioint 



Ctadophora glonierata. 



a, end of young filament ; 6, older, before 



the exit'o£ the zoospores ; c, the same 



empty; d, zoospores. (Thuret.) 



(Edogonium vesicatvm.- 



Filament of which each 



joint presents annular 



strise near the septa 



before the exit of the 



spore. (^Bhuret.) 



T„4 



Fucus vesiculous, 

 fr, frond ; r, fructiferous tubercle ; 

 Vj aeria vesicle. 



