SEAWEEDS 207 
fully colonized, generally a long time ago, and by 
plants of rather early types. But as regards the sea, 
the luxuriant Algal vegetation which is in possession 
of our shores has no reason to tremble for its 
supremacy. Beautifully adapted for their life, whether 
in sheltered bays or on stormy rocks, the Seaweeds 
show no sign of relinquishing the domain that has 
been theirs since the earliest rocks which still display 
traces of organic life were laid down in Cambrian 
seas. 
