WRIGHT AND PAGE: Taxonomic revision of Lake Tanganyikan Synodontis


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Figure 1. Drainage map of the African continent with Poll's geographic divisions outlined. 1 = Northern supra-
equatorial, 2 = Nile River drainage, 3 = Niger River drainage, 4 = Western supra-equatorial from the Senegal River to
the Ogowe River, 5 = Congo Basin, 6 = Southernmost sub-equatorial, 7 = Eastern Africa between Uebi Shebeli and
the Rufigi River, 8 = Lake Tanganyika drainage.