212 



SEAWEEDS 



FIG. 64. a, young plant of Choreocolax PolygiphonicK (dark cells) penetrating 

 host at angle formed by branches ; b, cystocarp of same in section ; c, tetra- 

 spores of the same (after Richards) ; d, Choreocolax albus with tetraspores ; the 

 dark cells, except the tetraspores. are those of the host. Highly magnified. 

 (After Kuckuck.) 



