Coral. A genus of zoophytae found in the sea, attached to stones, bones, shells, etc. Corals were formerly believed to bo vegetable substances,, but are now ascertained to consist of animals. The islands in the South Seas are principally coral rocks covered with earth, which have been formed by them from the bottom of the ocean. These submarine works are still proceeding, which renders it more than probable that new islands may occasionally be produced. The branch represented in the engraving contains several cells or apertures, each of which is tenanted by insects, which were long mistaken for flowers. Broken branches of coral have been seen to attach themselves to other branches, and thus to continue to grow. The three varieties are red, white, and black.