The most exaggerated example of scattered political location existing to-day is found in the bizarre arrangement of European holdings on the west coast of Africa between the Senegal and Congo rivers. Here in each case a handful of governing whites is dropped down in the midst of a dark-skinned population in several districts along the coast. The six detached seaboard colonies of the French run back in the interior into a common French-owned hinterland formed by the Sahara and western Sudan, which since 1894 link the Guinea Coast colonies with French Algeria and Tunis; but the various British holdings have no territorial cohesion at any point, nor have the Spanish or Portuguese or German. The scattered location of these different European possessions is for the most part the expression of a young colonizing activity, developed in the past fifty years, and signalized by the vigorous intrusion of the French and Germans into the field. To the anthropo-geographer the map of western Africa presents the picture of a political situation wholly immature, even embryonic. The history of similar scattered outposts of political expansion in America, India and South Africa teaches us to look for extensive consolidation. [Sidenote: Ethnic islands of survival.] Race islands occur also when a land is so inundated by a tide of invasion or continuous colonization that the original inhabitants survive only as detached remnants, where protecting natural conditions, such as forests, jungles, mountains or swamps, provide an asylum, or where a sterile soil or rugged plateau has failed to attract the cupidity of the conqueror. The dismembered race, especially one in a lower status of civilization, can be recognized as such islands of survival by their divided distribution in less favored localities, into which they have fled, and in which seldom can they increase and recombine to recover their lost heritage. In Central Africa, between the watersheds of the Nile, Congo and Zambesi, there is scarcely a large native state that does not shelter in its forests scattered groups of dwarf hunter folk variously known as Watwa, Batwa, and Akka.[273] They serve the agricultural tribes as auxiliaries in war, and trade with them in meat and ivory, but also rob their banana groves and manioc patches. The local dispersion of these pygmies in small isolated groups among stronger peoples points to them as survivals of a once wide-spread aboriginal race, another branch of which, as Schweinfurth suggested, is probably found in the dwarfed Bushmen and Hottentots of South Africa.[274] [See map page 105.]