GARDENS OF THE SEA 



183 



blooms, scums and net weeds. The color is 

 blue-green from the presence of phycocyan, but 

 this is subject to some marked exceptions. The 

 name of the Eed Sea was given because of the 

 presence upon the surface of a red species of 

 this class; and there are other red species that 

 appear in the tropic seas. Blue-green is, how- 

 ever, the predominant hue of the Cyanophy- 

 cecB. Many varieties of it that grow in salt 

 water remain quite unnoticed by us because of 

 their diminutive size. Some of them even re- 

 quire a microscope for recognition. 



In deeper water yet still along the beaches, 

 clinging to cliff rocks and growing in stony 

 shallows, are the brown algm that belong to the 

 class Phceophycece. There are many orders in 

 this group and some of the forms are the 

 largest of the sea weeds. The giant kelp or 

 " Devil's Apron " several hundred feet in 

 length, the Macrocystis of the Pacific with its 

 thousand feet of stem, the bulky Lessonia, the 

 sea palm, and the sea-otter's cabbage belong to 

 it ; and in a different division are the wrack that 

 shows on the rocks at low tide, the Gulf weed 

 that gathers in the Sargasso Sea and makes 

 breeding places for pelagic or deep-sea fishes, 

 and many small and complex forms of rock 

 weed. A large number of this group live in the 



Bhie-green 

 alga. 



Brown 

 algae. 



Kelp and 



rod: ivred. 



