CORALS AND CORAL MAKERS. 



59 



part of the Alcyonia in having the polyps not retractile ; the 

 tentacles fold together, if the zoophyte is disturbed, but cannot 

 hide themselves. 



The following figure represents another related species 

 obtained by Dr. W. Stimpson, near Hong Kong, and called 

 by its discoverer Anthelia lineata; the polyps are but partly 

 expanded. 



