966 



XIV. ALG^J. 



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

 sporangia, monoecious or dioecious, and mostly producing motionless spores, solitary or 

 quaternary in the same sporangium (perispore}. 



TRIBE I. FLORIDE^l, Lamouroux, Thuret. RHODOSPERME^E, Harv., 

 CHORISTOSPORErf}, Dene. 



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

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



Nemalium muVifidum. 



g and 9 branches, anthcrozoids 



at the top o the trichogyne. (Thuret.) 



Lfjolitia mediterranea. 



a, Ceramidium from which a spore has 



escaped ; b, antheridium. (Bornet. 



Callithamnion eorymbotv 



Antheridia and antherozoids. 



(Thuret.) 



Arlhrocardia eorymbota 



Branch of which some joints arc 



furnished with conceptocfaf (mag.). 



r 



RyltpMaea ptii-purea. Branch and stylidia 

 in different stages of growth (mag.). 



nytiphlaa glomerate. 



Portion of frond edged with 



stylidia (mag.)- 



