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The bull kept at Heliopolis which they call Mneuis, Cf. Diodorus, i. 21; Eusebius, Praepar. Evang. iii. 13. 1-3; Strabo, xvii. 1. 22; Aelian, De Natura Animalium, xi. 11. and which is sacred to Osiris (some hold it to be the sire of Apis), is black and has honours second only to Apis. Egypt, moreover, which has the blackest of soils, Cf. Herodotus, ii. 12. they call by the same name as the black portion of the eye, Chemia, and compare it to a heartHorapollo, Hieroglyphica, i. 22.; for it is warm and moist and is enclosed by the southern portions of the inhabited world and adjoins them, like the heart in a man’s left side.