Passage 10.31.1
εἰ δὲ ἀπίδοις πάλιν ἐς τὸ ἄνω τῆς γραφῆς, ἔστιν ἐφεξῆς τῷ Ἀκταίωνι Αἴας ὁ ἐκ Σαλαμῖνος, καὶ Παλαμήδης τε καὶ Θερσίτης κύβοις χρώμενοι παιδιᾷ, τοῦ Παλαμήδους τῷ εὑρήματι· Αἴας δὲ ὁ ἕτερος ἐς αὐτοὺς ὁρᾷ παίζοντας. τούτῳ τῷ Αἴαντι τὸ χρῶμά ἐστιν οἷον ἂν ἀνδρὶ ναυαγῷ γένοιτο ἐπανθούσης τῷ χρωτὶ ἔτι τῆς ἅλμης.
If you look again toward the upper part of the painting, next to Actaeon stands Ajax of Salamis, and Palamedes together with Thersites play a game with dice—an invention of Palamedes. The other Ajax looks at them as they play. The complexion of this Ajax is such as a shipwrecked man might have, his flesh still bloomed with the brine.