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Gephyrean :: Gephyrean (a.) Belonging to the Gephyrea. -- n. One of the Gerphyrea.

Phoronis :: Phoronis (n.) A remarkable genus of marine worms having tentacles around the mouth. It is usually classed with the gephyreans. Its larva (Actinotrocha) undergoes a peculiar metamorphosis.

Gephyrea :: Gephyrea (n. pl.) An order of marine Annelida, in which the body is imperfectly, or not at all, annulated externally, and is mostly without setae..

Sipunculacea :: Sipunculacea (n. pl.) A suborder of Gephyrea, including those which have the body unarmed and the intestine opening anteriorly..

Siphon :: Siphon (n.) A sproutlike prolongation in front of the mouth of many gephyreans.

Gephyreoid :: Gephyreoid (a. & n.) Gephyrean.

Sipunculoidea :: Sipunculoidea (n. pl.) Same as Gephyrea.

Spoonwort :: Spoonworm (n.) A gephyrean worm of the genus Thalassema, having a spoonlike probiscis..

Echiuroidea :: Echiuroidea (n. pl.) A division of Annelida which includes the genus Echiurus and allies. They are often classed among the Gephyrea, and called the armed Gephyreans..

Annulata :: Annulata (n. pl.) A class of articulate animals, nearly equivalent to Annelida, including the marine annelids, earthworms, Gephyrea, Gymnotoma, leeches, etc. See Annelida..

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