Hypius
Ὕπιος
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. sub voce 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.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.