Selinunte, an ancient Greek archaeological site on the south coast of Sicily
The Halycus, which was established as the eastern boundary of the Carthaginian dominion in Sicily by the treaty of 383 BCE, seems to have generally continued to be so recognized, notwithstanding temporary interruptions; and was again fixed as their limit by the treaty with Agathocles in 314 BCE.
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Diodorus places it 22 years earlier, or 650 BCE, and Hieronymus still further back, 654 BCE.
Thus, in 314 BCE, Diodorus tells us that, by the treaty between Agathocles and the Carthaginians, it was stipulated that Heracleia, Selinus and Himera should continue subject to Carthage as they had been before.