Passage 8.18.1
εἶναι δὲ τὴν Στύγα Ἡσίοδος μὲν ἐν Θεογονίᾳ πεποίηκεν---Ἡσιόδου γὰρ δὴ ἔπη τὴν Θεογονίαν εἰσὶν οἳ νομίζουσι---, πεποιημένα οὖν ἐστιν ἐνταῦθα Ὠκεανοῦ θυγατέρα τὴν Στύγα, γυναῖκα δὲ αὐτὴν εἶναι Πάλλαντος. ἐοικότα δὲ πεποιηκέναι τούτοις καὶ Λίνον φασίν· ἐμοὶ δὲ ἐπιλεγομένῳ παντάπασιν ἐφαίνετο ταῦτά γε εἶναι κίβδηλα.
Now, Hesiod in the Theogony has also composed a description of Styx—for there are indeed those who consider the verses of the Theogony to belong to Hesiod. At any rate, Styx is here portrayed as a daughter of Oceanus, and as the wife of Pallas. They also say that Linus has created something similar to these accounts; however, upon careful reflection, these particular narratives appeared to me altogether dubious.