(Πρωταγορίδης),of Cyzicus, a writer only known to us from Athenaeus, who refers to three of his works:--1. Περὶ Δαφνικῶν ἀγώνων, on the games celebrated at Daphne, a village in the neighbourhood of Antioch (iv. pp. 150, c., 176, a., 183, f.). 2. Κωμικαὶ Ἱστορίαι, a history of Comedy (iii. p. 124e.). 3. Ἀκροάσεις ἐρωτικαὶ, love tales (iv. p. 162c.).