According to the article, which can be read in its entirety here, the African space was left open and undivided to encourage viewers to wander to whatever catches their eyes.
For examples of African art - masks, carvings, textiles, etc - in the Aboriginals: Art of the First Person collection, visit TribalWorks.
If African art is not your thing, try one of our other sites for Zuni and Native American fetish carvings, American Indian pottery or American Indian jewelry.