392 
THE SEAWEEDS 
Fig. 197 . — Mastophora Lamourouxii. 
Fig. 198 . — Mastophora canaliculata: a, plant; b, 
portion of the frond, lower surface; 
c, portion of the frond, upper surface, 
bearing conceptacles ; d, spore threads; 
e, section of the frond and a con- 
ceptacle. (After Harvey.) 
