In Egyptian mythology, Mnewer was a black bull in Heliopolis, worshipped as a symbol of fertility and as an oracle. It was considered a symbol, or avatar, of Ra.
The Mnevisbull was totally fl and was usually depicted with a sun-disc and ureaus between it`s horns.
The cult of the Mnevisbull became absorbed by that of the creator-god, Ra-Atum.
Mnevis was actually still recognized by the pharaoh, Akhenaten (1352-1336 BC) who had a cemetery prepared for the Mnevisbull in the eastern mountains of Akhetaten.
In Egyptian mythology, Mnewer (also spelt Mnevis) was a manifestation of the Ka (life-force/power) of the chief god, Atum-Ra, in the region of Heliopolis.
Thus, as a symbol of the sun god, Ra, the Mnevis was often depicted, in art, with a solar disc between its horns.
A suitable bull was selected from the area, and said to be the living Mnevisbull, and was taken to a special temple, where it was worshipped, and its movement used as an oracle.