BRANCH CCELEHTERATA : THE POLYPS, ETC. 103 



some small, some large, some with the body covered out- 

 side with tiny bits of stone and shell so that they are 

 hardly to be distinguished from the rock to which they 



FIG. 16. Sea anemones, Bunodes californica, open and .closed individuals. 

 The closed- individuals in upper right-hand corner show the external 

 covering of small bits of rock and shell, characteristic of most individu- 

 als of this species. (From living specimens in a tide-pool on the Bay 

 of Monterey, California.) 



cling; some of bright and showy colors. These are the 

 most familiar members of the class Actinozoa. 



But in other oceans, along the coasts of other lands, 

 especially those of the tropics and sub-tropics, there are 



