The Psilis ( grc, Ψίλις) or Psillis (Ψίλλις) was a river of
ancient Bithynia
Bithynia (; Koine Greek: , ''Bithynía'') was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Pa ...
that drained to the
Pontus Euxinus
The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Roma ...
.
It is identified with the modern .
References
Geography of Bithynia
Rivers of Turkey
Ancient Greek geography
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