ANTHOZOA, ACTINOZOA

cla of Ccelentera, represented by sea-anemones and coral-forming polyps, with tentacles often provided with stinging cells round the mouth, a well-developed gullet, and vertical radially. arranged ridges or mesenteries on the interior of the body walls. They reproduce sexually, and chiefly by budding. Both individuals and colonies are some of the most beautiful denizens of the sea. The a. are divided into two subcla es The Zoantharia have tentacles and me sent eres, some multiple of six, the limy skeleton, if any, grows from the base, and they are either simple or colonial, and include the sea-anemones (Act i and the ‘black’ corals (Anti path aria); The Alcyonarva have eight feathered tentacles and eight mesenteries, and diversely shaped calcareous spicules forming corals (e.g.), Dead-Men’s-FinRed coral (Corallium), Organ-Pipe coral (Tubipora), etc.