Passage 7.27.12
Κριὸς δὲ καὶ ἄλλος ὠνόμασται ποταμός, ὃς ἀρχόμενος ἐκ Σιπύλου τοῦ ὄρους ἐς τὸν Ἕρμον κάτεισι. καθότι δὲ Πελληνεῦσιν ὅροι τῆς χώρας πρὸς Σικυωνίους εἰσί, κατὰ τοῦτο ποταμός σφισι Σύθας, ἔσχατος ποταμῶν τῶν Ἀχαϊκῶν, ἐς τὴν Σικυωνίαν ἐκδίδωσι θάλασσαν.
Another river called Krios begins from Mount Sipylos and flows down into the Hermos. At the place where the boundaries of the Pellenians' territory meet those of the Sikyonians, the river Sythas, the last of Achaean rivers, empties into the sea within Sikyonian land.