Mr. Max Müller’s Explanation

Greek races traced to Zeus—usually disguised, for amorous purposes, as a brute. The Arcadians had an eponymous heroic ancestor, ‘Areas;’ they also worshipped Artemis. Artemis, as a virgin, could not become a mother of Areas by Zeus, or by anybody. Callisto was also Artemis. Callisto was the mother of Areas. But, to save the character of Artemis, Callisto was now represented as one of her nymphs. Then, Areas reminding the Arcadians of αρκτος (a bear), while they knew the Bear constellation, ‘what was more natural than that Callisto should be changed into an arktos, a she-bear . . . placed by Zeus, her lover, in the sky’ as the Bear?

Nothing could be more natural to a savage; they all do it. [{144b}] But that an Aryan, a Greek, should talk such nonsense as to say that he was the descendant of a bear who was changed into a star, and all merely because ‘Areas reminded the Arcadians of arktos,’ seems to me an extreme test of belief, and a very unlikely thing to occur.