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Vesiculata :: Vesiculata (n. pl.) The campanularian medusae.

Meconidium :: Meconidium (n.) A kind of gonophore produced by hydroids of the genus Gonothyraea. It has tentacles, and otherwise resembles a free medusa, but remains attached by a pedicel..

Strobila :: Strobila (n.) A form of the larva of certain Discophora in a state of development succeeding the scyphistoma. The body of the strobila becomes elongated, and subdivides transversely into a series of lobate segments which eventually become ephyrae, or young medusae..

Medusa :: Medusa (n.) The Gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone..

Gonophore :: Gonophore (n.) A sexual zooid produced as a medusoid bud upon a hydroid, sometimes becoming a free hydromedusa, sometimes remaining attached. See Hydroidea, and Illusts. of Athecata, Campanularian, and Gonosome..

Rhizostomata :: Rhizostomata (n. pl.) A suborder of Medusae which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix..

Lithocyst :: Lithocyst (n.) A sac containing small, calcareous concretions (otoliths). They are found in many Medusae, and other invertebrates, and are supposed to be auditory organs..

Polypite :: Polypite (n.) Sometimes, the manubrium of a hydroid medusa..

Medusoid :: Medusoid (a.) Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids..

Acalephae :: Acalephae (n. pl.) A group of Coelenterata, including the Medusae or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles..

Sea Jelly :: Sea jelly () A medusa, or jellyfish..

Trachymedusae :: Trachymedusae (n. pl.) A division of acalephs in which the development is direct from the eggs, without a hydroid stage. Some of the species are parasitic on other medusae..

Scapulet :: Scapulet (n.) A secondary mouth fold developed at the base of each of the armlike lobes of the manubrium of many rhizostome medusae. See Illustration in Appendix.

Sea Nettle :: Sea nettle () A jellyfish, or medusa..

Ephyra :: Ephyra (n.) A stage in the development of discophorous medusae, when they first begin to swim about after being detached from the strobila. See Strobila..

Rhopalium :: Rhopalium (n.) One of the marginal sensory bodies of medusae belonging to the Discophora.

Medusae :: Medusae (pl. ) of Medus.

Tentaculocyst :: Tentaculocyst (n.) One of the auditory organs of certain medusae; -- called also auditory tentacle.

Quarl :: Quarl (n.) A medusa, or jellyfish..

Medusian :: Medusian (n.) A medusa.

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