ISLAND-BUILDERS. 



9 



ocean depths, which for mankind are regions of 

 breathlessness and death, are for myriads of animals 

 the region of life and health. 



The earth does not maintain nearly so many living 

 creatures as swarm in countless multitudes beneath the 



Grassiiyh. 



waves of the ocean. Here grow the quaint-looking 

 sea squirts; here the strange sea spiders pass their 

 lives in the greatest depths of the ocean ; here swim 

 the fish which are to the world of waters what birds 

 are to the upper world ; the quaintest and most eccen- 

 tric of creatures, as the sea horses, the grassflsh, and 

 3 



