He tells us that Stobi is a town with many Roman citizens, followed by the phrase "next comes Antigonea, Europus, upon the river Axius" and so on. Thus, we know that Antigonia is located somewhere near Stobi and that Antigonia is not placed on the bank of the river Axius like Aeropus as said by Pliny.
The individual shares a list of towns, including Stobi and Antigonia, which are adjacent to one another. This information allows us to conclude that Antigonia is not situated on the river Axius, as stated by Pliny.