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A genus of Hydrocorallia, which includes the millipores.

Any coral of the genus Millepora, having the surface nearly smooth, and perforated with very minute unequal pores, or cells. The animals are hydroids, not Anthozoa. See Hydrocorallia.

Having numerous ribs, or costæ, as the leaf of a plant, or as certain shells and corals.

ed like a mushroom, capable of grasping the ground in whatever way it falls. -- Mushroom coral (Zoöl.), any coral of the genus Fungia. See Fungia. -- Mushroom spawn (Bot.), the mycelium, or primary filamentous growth, of the mushroom; also, cakes of earth and manure containing this growth, which are used for propagat…

their surface, and were formerly thought to be of animal nature. They are now considered corallines of the genera Melobesia and Lithothamnion.

Idioplasma. -- Nutritive polyp (Zoöl.), any one of the zooids of a compound hydroid, or coral, which has a mouth and digestive cavity. -- Nu"tri*tive*ly, adv. -- Nu"tri*tive*ness, n.

A genus of tropical corals, usually branched, and having a very volid texture.

A suborder of corals including many reef-building species, having round, starlike calicles.

An artifical red nitrogenous dyestuff, called also red coralline.

Resembling a palus; as, the paliform lobes of the septa in corals.

g the distal portion broad, flat, and more or less divided into lobes; -- said of certain corals, antlers, etc.

A polystome worm (Palolo viridis) that burrows in the coral reefs of certain of the Pacific Islands. A little before the last quarter of the moon in October and November, they swarm in vast numbers at the surface of the sea for breeding, and are gathered and highly esteemed as food by the natives. An allied species inh…

ht slender calcareous processes which surround the central part of the calicle of certain corals.

A division of alcyonoid corals, including the seapens and related kinds. They are able to move about by means of the hollow muscular peduncle, which also serves to support them upright in the mud. See Pennatula, and Illust. under Alcyonaria.

A division of corals including those that have a porous texture, as Porites and Madrepora; -- opposed to Aporosa.

ms, composed of united personæ . . . usually arise by gemmation, . . . yet in sponges and corals occasionally by fusion of several originally distinct persons. Encyc. Brit. Artificial, or Fictitious, person (Law), a corporation or body politic. blackstone. -- Natural person (Law), a man, woman, or child, in distinctio…

One of the feeding or nutritive zooids of a hydroid or coral.

A coral, or corallum; also, one of the coral-like structure made by bryozoans and hydroids.

One of the feeding zooids, or polyps, of a coral, hydroid, or siphonophore; a hydranth. See Illust. of Campanularian.

ntridæ, a family of bright-colored tropical fishes having spiny opercula; -- often called coral fishes.