Hypertext Webster Gateway: "Hippa"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Hippa \Hip"pa\, Hippe \Hip"pe\, n. (Zo["o]l.)
A genus of marine decapod crustaceans, which burrow rapidly
in the sand by pushing themselves backward; -- called also
{bait bug}. See Illust. under {Anomura}.
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