The Probert Encyclopaedia of Greek & Roman Mythology

ACIS

In Greek mythology, Acis was a beautiful shepherd of Sicily. He was the son of Faunus and a river nymph. He loved the sea-nymph Galatea and was killed by his jealous rival Polyphemus, who crushed him under a huge rock. According to Sicillian tradition he was then turned into the river of the same name which runs at the foot of Mount Etna, or else his escaping blood turned into the river which now bears his name.
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