112 SEAWEEDS 
host on which they may be epiphytic. Runners 
proceed from these, which sometimes give rise to 
new plants. The erect shoots are mostly articulated 
, Showing unilocular sporangia ; ¢, 
+h, S. cirrhosa 
Highly magnified. 
-—a, Sphacelaria filicina, tip of filament: 
same showing plurilocular sporangia. 
Fic. 28. 
the 
filaments consisting of tiers of cells and terminating 
upwards in an apical cell, by division of which growth 
takes place. This apical cell is of relatively large 
size and the shoot possesses the remarkable power 
