 Pomponius Mela is, however, the only ancient geographer who adopts it.The Salso enters the sea at Licata (the ancient Phintias).In the upper part of its course it is composed of two branches, running nearly parallel with one another; the one now called the Imera Settentrionale rising near Gangi, the other, called the Fiume di Petralia, from the town of the same name