Hyperis
Hyperis (Plin. Nat. 6.23. s. 26), a small stream mentioned only by Pliny, which falls, according to him, into the middle of the Persian gulf. Forbiger has conjectured that it may be the same as that now called the Djayrah.
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.