COliAL POLYPS. 8i 



times growing to fi diameter of tlirco feet. The common 

 large West Indian liraiii-coral is Ma'findrina lahyrinlliica. 



In Astrwa paUula Dana, of tlie Feejce Islands, tlie polyps 

 are pale, the disks Iduish gray, and the tentacles whitish. 

 The polyps of many corals are beautifully colored. Those 



t"iy. rj:i.—Lo/>/w/uUa pw/iJ>rii.—Ahi:v \\'y\ illu-'riiuiiiii^.-ii. 



of Jshvjvi/i't Daiup Agiissiz are white. In this coral, as 

 ohservcd l.iy Dana, the polyps stand jirominently above the 

 calicles, as only their bases secrete coral. The tentacles 

 liave minute warty iiromiuriices, each full of lasso-cells. 



