I'm reading Carl Jung's Man and His Symbols now, and although he was brilliant-- and I'm by no means a Jungian scholar, so maybe I'm missing something here-- but I would love to go back in time and introduce him to the Enneagram. I wonder how much more lucid he'd be if he had that vocabulary. I'm sure his book would be half the length if he could just say, "underdevelopped Type Four" for the pages of description for the wicked anima or "Type Eight woman" for "a woman with occasional outbursts of temper who talked in an aggressive fashion that alienated men and gave her an intolerable feeling of dissatisfaction with herself." These descriptions are fine, but if he knew people's types, he could cover a lot of ground with a couple words and be a lot clearer.
Carl Jung's lifespan was between 1875 and 1961. The Enneagram was still unknown in the U.S. until the early 1970's, and even then it wasn't until the early 90's that there were a couple books available to the general public about it.
Still, George Gurdjieff (Russia/France) and Oscar Ichazo (Bolivia/Chile) were working with it with their own study groups as far back as the 1940's, but even then, they were still talking in shapes and very vague archetypes, so it probably wouldn't have been much use to Jung anyway. (Although talking in vague terms didn't seem to be an issue for him).
While we wait for someone to provide an Enneagram "translation" of Jung, we will have to muddle through and figure out what he meant when he told an educated, successful woman to "set about trying to change herself into a more submissive kind of woman" who had to realize that for a man, "life is something that has to be taken by storm, as an act of the heroic will; but for a woman to feel right about herself, life is best realized by a process of awakening."