Laguna @arine Laboratory 201 
CHORDARIACEAE 
Cylindrocarpus berkeleyi (Grev.) Crouan 
Frequent on rocks and on shells in the middle tidal zone. 
RALFSIACEAE 
Ralfsia clavata (Carm.) Farlow 
Frequent on rocks of the high tidal zone. 
Hapterophycus canaliculatus A. and G. 
In large colonies on the rocks of the lower tidal zone. 
LAMINARIACEAE 
Eisenia arborea Areschoug 
(Figure 109) 
Abundant on rocks about the low tide mark, commonly growing 
on the borders of deep channels, and attaining a length of six feet. 
Figure 114. Nemalion lubricum Duby. 
