Who played bass on "She Said She Said?"

There are several songs in the Beatles' catalog for which there is some controversy over who played what instrument. One of those songs is "She Said She Said," recorded in June 1966 for the Revolver album. During the recording session for this song, Paul McCartney had an argument with John Lennon and stormed out of the studio. He claimed he didn't appear on the recording of that song at all. But is his memory accurate? Who played bass on "She Said She Said?"