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The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.

of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age.

The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods.

Swimming by the expansion and contraction, or lunglike movement, of the body, or of the disk, as do the medusæ.

A division of swimming birds which includes the grebes, divers, auks, etc., in which the legs are placed far back.

ists of floating timbers fastened together. -- Raft duck. Etym: [The name alludes to its swimming in dense flocks.] (Zoöl.) (a) The bluebill, or greater scaup duck; -- called also flock duck. See Scaup. (b) The redhead. -- Raft port (Naut.), a large, square port in a vessel's side for loading or unloading timber or o…

One of a group of aquatic beetles having tarsi adapted for swimming. See Water beetle.

the very sides of the way . . . there are slow runnels, in which one can see the minnows swimming. Masson.

A genus of transparent, free-swimming marine worms having lateral and caudal fins, and capable of swimming rapidly. It is the type of the class Chætognatha.

A genus of transparent, tubular, free-swimming oceanic tunicates found abundantly in all the warmer latitudes. See Illustration in Appendix.

straca in which each of the thoracic legs has a long fringed upper branch (exopodite) for swimming.

Any swimming amphipod crustacean. Storm scud. See the Note under Cloud.

yrops), common on the Atlantic coast of the United States. It appears bright silvery when swimming in the daytime, but shows broad blackish transverse bands at night and when dead. Called also porgee, paugy, porgy, scuppaug.

Any swimming bird frequenting the sea; a sea fowl.

A swimming leg (of an insect) having a fringe of hairs on the margin.

An order of pelagic Hydrozoa including species which form complex free-swimming communities composed of numerous zooids of various kinds, some of which act as floats or as swimming organs, others as feeding or nutritive zooids, and others as reproductive zooids. See Illust. under Physallia, and Porpita.…

places in Southern India and the East Indies. Its pithlike stem is used for making hats, swimming-jackets, etc. [Written also solah, shola.]

A division of swimming birds in which all four toes are united by a broad web. It includes the pelicans, cormorants, gannets, and others.

Swimming above; floating on the surface; as, oil supernatant on water. SUPERNATANT Su`per*na"tant, n. (Chem.)

a large and strong beak and a long neck, and are noted for their graceful movements when swimming. Most of the northern species are white. In literature the swan was fabled to sing a melodious song, especially at the time of its death.