Oncus
(
*)/Ogkos), a son of Apollo, and founder of Onceium in Arcadia. Demeter, after being me tamorphosed ilto a horse, mixed among his herds, and gave him the horse Arion, of which she was the mother by Poseidon. (
Paus. 8.25.4, &c.; comp. Step. Byz.
s. v.)
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L.S]