CORYCIAN NYMPHS

The 'Corycian Nymphs' were the three Naiads (nymphs) of the sacred springs of the Corycian Cave of Mount Parnassus in Phocis. The names of the nymphs are Corycia, Kleodora and Melaina; their father's name was Kephisos or Pleistos.
Corycia was the sister whom the Corycian Cave was named after. She was the mother of Lycoreus with Apollo.
Kleodora was loved by Poseidon. With (Poseidon or Kleopompos) she was the mother of Parnassos, who founded the city of Parnassus. (Pausanias 10.6.13).
Melaina was loved by Apollo, bearing him Delphos. Another tradition names Thyia as the mother of Delphos. Her name meant "the black," suggesting she presides over subterranean nymphs.