APIS or HAPI (the Bull), a god of the ancient Egyptian Pan theon. His chief centre of worship was Memphis and he was supposed to be the image of the soul of Osiris. He is occasionally represented as a man with the head of a bull. He was also regarded as the reincarnation (or the .son) of Ptah—except by Greek writers—and from his posthumous name of Osiris-Apis is derived his other name, Serapis.