126 
THE SEAWEEDS 
Fig. 4. — Bangia fusco-purpurea: a , plants attached to a twig; 
b to e, different portions of same filament; f and g, 
transverse sections of the plant; h, transverse 
section of plant showing sperms; i, surface view of 
plant showing sperms. (After Tilden.) 
Fig. 5.—Porphyra umbilicalis. 
