CHAPTER X 

 CORALS, SEA-ANEMONES AND JELLY-FISHES 



Like the sponges, most of the polyps, and jelly-fishes, com- 

 posing the branch Coelenterata (Gr. koilos, hollow; enter on, 

 intestine) are found in the sea. Those who live near the sea- 



FIG. 15. Sea-anemones. The middle specimen expanded and feed- 

 ing; lower specimens partly or wholly contracted and with disk closed. 



shore are familiar with the many-colored, flower-like sea- 

 anemones that cover the rocks in shallow water, and with the 

 clear transparent medusae or jelly-fishes, which truly look 

 like masses of animated translucent jelly. Less familiar are 



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