Mogrus
Μῶγρος
Mogrus (Μῶγρος), a navigable river in Colchis, flowing into the Euxine between the Phasis in the north, and the Isis in the south; its mouth is just midway between the two, being 90 stadia distant from each. (Arrian, Peripl. Pont. Eux. p. 7; Plin. Nat. 6.4.) As an ancient reading in Pliny is Nogrus, and the Table has Nigrus, it is possible that the real name of the river may have been Nogrus, and that in Arrian also we must read Νῶγρος.
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.