HYPIUS(Ὕπιος: Karasu), a river of Bithynia not far westward from the Sangarius. The rive itself is very small; but at its mouth it is so broad that the greater part of the fleet of Mithridates wa enabled to take up its winter quarters in it. (Apollon. 2.795; Scylax, p. 34; Marcian. Heracl. p. 70; Steph. B. s. v.;Arrian, Peripl. p. 13, who calls it Hyppius; Memnon, ap. Phot. Cod. 44.) According to Scylax, this river formed the boundary between the territories of the Bithyni and the Mariandyni.
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