Ampyx
From LSJ
ὣς ὁ μὲν ἔνθ' ἀπόλωλεν, ἐπεὶ πίεν ἁλμυρὸν ὕδωρ → so there he perished, when he had drunk the salt water
Ampyx: ycis, m., = Ἄμπυξ.
I One of the Lapithœ; acc. Ampyca, Ov. M. 12, 450. —
II One of the companions of Phineus, changed to stone by Perseus, Ov. M. 5, 184.