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Tubivalve :: Tubivalve (n.) A shell or tube formed by an annelid, as a serpula..

Elytrum :: Elytrum (n.) One of the shieldlike dorsal scales of certain annelids. See Chaetopoda.

Lithophagous :: Lithophagous (a.) Eating or destroying stone; -- applied to various animals which make burrows in stone, as many bivalve mollusks, certain sponges, annelids, and sea urchins. See Lithodomus..

Strobile :: Strobilation (n.) The act or phenomenon of spontaneously dividing transversely, as do certain species of annelids and helminths; transverse fission. See Illust. under Syllidian..

Sandworm :: Sandworm (n.) Any species of annelids of the genus Sabellaria. They construct firm tubes of agglutinated sand on rocks and shells, and are sometimes destructive to oysters..

Ditokous :: Ditokous (a.) Having two kinds of young, as certain annelids..

Palola :: Palola (n.) An annelid (Palola viridis) which, at certain seasons of the year, swarms at the surface of the sea about some of the Pacific Islands, where it is collected for food..

Mesotrochal :: Mesotrochal (a.) Having the middle of the body surrounded by bands of cilia; -- said of the larvae of certain marine annelids.

Vermes :: Vermes (n. pl.) An extensive artificial division of the animal kingdom, including the parasitic worms, or helminths, together with the nemerteans, annelids, and allied groups. By some writers the branchiopods, the bryzoans, and the tunicates are also included. The name was used in a still wider sense by Linnaeus and his followers..

Setiger :: Setiger (n.) An annelid having setae; a chaetopod.

Annellata :: Annellata (n. pl.) See Annelida.

Tube :: Tube (n.) A more or less cylindrical, and often spiral, case secreted or constructed by many annelids, crustaceans, insects, and other animals, for protection or concealment. See Illust. of Tubeworm..

Naid :: Naid (n.) Any one of numerous species of small, fresh-water, chaetopod annelids of the tribe Naidina. They belong to the Oligochaeta..

Uncinata :: Uncinata (n. pl.) A division of marine chaetopod annelids which are furnished with uncini, as the serpulas and sabellas..

Lugworm :: Lugworm (n.) A large marine annelid (Arenicola marina) having a row of tufted gills along each side of the back. It is found burrowing in sandy beaches, both in America and Europe, and is used for bait by European fishermen. Called also lobworm, and baitworm..

Annuloida :: Annuloida (n. pl.) A division of the Articulata, including the annelids and allied groups; sometimes made to include also the helminths and echinoderms..

Trochosphere :: Trochosphere (n.) A young larval form of many annelids, mollusks, and bryozoans, in which a circle of cilia is developed around the anterior end..

Spirable :: Spiodea (n. pl.) An extensive division of marine Annelida, including those that are without oral tentacles or cirri, and have the gills, when present, mostly arranged along the sides of the body. They generally live in burrows or tubes..

Neurocord :: Neurocord (n.) A cordlike organ composed of elastic fibers situated above the ventral nervous cord of annelids, like the earthworm..

Setiparous :: Setiparous (a.) Producing setae; -- said of the organs from which the setae of annelids arise.

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