Passage 3.18.15
ὑπελθόντι δὲ ὑπὸ τὸν θρόνον τὰ ἔνδον ἀπὸ τῶν Τριτώνων ὑός ἐστι θήρα τοῦ Καλυδωνίου καὶ Ἡρακλῆς ἀποκτείνων τοὺς παῖδας τοὺς Ἄκτορος, Κάλαϊς δὲ καὶ Ζήτης τὰς Ἁρπυίας Φινέως ἀπελαύνουσιν· Πειρίθους τε καὶ Θησεὺς ἡρπακότες εἰσὶν Ἑλένην καὶ ἄγχων Ἡρακλῆς τὸν λέοντα, Τιτυὸν δὲ Ἀπόλλων τοξεύει καὶ Ἄρτεμις·
As you pass under the throne, the figures inside, starting from the Tritons, are: the hunt of the Calydonian boar; Heracles killing the sons of Actor; Calaïs and Zetes driving away the Harpies from Phineus; Pirithous and Theseus depicted abducting Helen; Heracles strangling the lion; and Tityos being shot by Apollo and Artemis.