222 THE GEOGRAPHY OF MAMMALS 



districts somewhat to the south of the river Gambia, 

 and to continue all down the coast-region into Angola, 

 south of the Congo. Here the dry and open country of 

 south-west Africa commences, and, as the Chimpanzee 

 is essentially a forest animal, it could not be expected 

 to be met with farther in this direction. The Chimpanzee 

 in its inland range appears to extend over the whole wood- 

 district of the great Congo valley, and in the Niam-Niam 

 country, perhaps, passes over into the basin of the Nile. 

 It was heard of by Livingstone in the forests on the western 

 side of Lake Tanganyika where it is said to be called " Soko," 

 and the late Emin Pasha sent to England the skull of a 

 Chimpanzee stated to have been shot by himself near 

 Lake Albert Nyanza, which seems hardly to differ from 

 the West African form. Whether Emin Pasha's assertion 

 that the Chimpanzee occurs in Uganda and Unyoro up to 

 32° E. lat. is correct is very doubtful. It seems to have 

 been made on native authority, and has not, so far as we 

 are aware, been corroborated by more recent travellers. 

 But as regards its existence in the Niam-Niam country 

 we have Emin Pasha's express statement that he re- 

 ceived a living specimen of the Chimpanzee as a present 

 from one of the chiefs of that nation. 1 



The Gorilla (A. gorilla), which by some authors is 

 referred to a different genus from the Chimpanzee although 

 its general structure is not materially different, is confined 

 to a very much more limited area than that of its smaller 

 brother (A. troglodytes). So far as we know at present, 

 it seems to be entirely restricted to Gaboon and the ad- 

 jacent districts of French Congo. Whether the extra- 

 ordinary accounts formerly given of the strength and 



1 " Emin Pacha in Central Africa," p. 355. 



