966 



XIV. ALG^. 



with vibrating hairs and gifted with motion {zoospores)'; sometimes of antheridia and 

 sporangia^ monoecious or ddoeciousy and mostly producing motionless spores^ solitary or 

 quaternary in the same sporangium {perispore). 



Tribe I. FLOBIDEJEJ, Lamourom, Thuret.—BHODOSPERMEM, Ha/rv., 

 GH0RI8T0SP0RE^, Dene. 



Marine, or very rarely fresh-water Algce, rose, violet, purple, red-brown, or rarely 

 greenish, often mucilaginous, formed of simple or branched filaments {Dasya), or of 



Nemalium mvUifidum. 



^ and 9 branches, antherozoids 



at the top o the trichogyne. (Tfiwret.) 



CalUthamnion corymbosu 



Antheridia and autherozoidSr 



(Thuret.) 



Zejolisia mediterranea. 



u, Ceramldium from which a spore has 



escaped ; 6, antheridium. (Bomet. 



Artlirocardia corynihosa 



Branch of which some joints are 



famished with conceptacles (Mag".). 



RytiphlcEa purpurea. Branch and stylidia 

 in different stages of growth (mag.)- 



Mytiphlcea glomerata. 



Portion of frond edged with 



stylidia (mag.). 



