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Tectibranchia :: Tectibranchia (n. pl.) Same as Tectibranchiata.

Aplysia :: Aplysia (n.) A genus of marine mollusks of the order Tectibranchiata; the sea hare. Some of the species when disturbed throw out a deep purple liquor, which colors the water to some distance. See Illust. in Appendix..

Tectibranchiate :: Tectibranchiate (a.) Having the gills covered by the mantle; of or pertaining to the Tectibranchiata.

Tectibranchiata :: Tectibranchiata (n. pl.) An order, or suborder, of gastropod Mollusca in which the gills are usually situated on one side of the back, and protected by a fold of the mantle. When there is a shell, it is usually thin and delicate and often rudimentary. The aplysias and the bubble shells are examples..

Sea Hare :: Sea hare () Any tectibranchiate mollusk of the genus Aplysia. See Aplysia.

Tectibranch :: Tectibranch (n.) One of the Tectibranchiata. Also used adjectively.

Tectibranchiate :: Tectibranchiate (n.) A tectibranchiate mollusk.

Bubble Shell :: Bubble shell () A marine univalve shell of the genus Bulla and allied genera, belonging to the Tectibranchiata..

Umbrella :: Umbrella (n.) Any marine tectibranchiate gastropod of the genus Umbrella, having an umbrella-shaped shell; -- called also umbrella shell..

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