In his distribution he is confined to equatorial Africa. His habitat, roughly outlined, is from the fourth parallel north of the equator to the fifth parallel south of it, along the west coast, and extends eastward a little more than halfway across the continent. His range cannot be defined with precision, for its exact limits are not yet known. Its boundary on the north is defined by the Cameroon valley, slightly curving towards the north; but its extent eastward is a matter of some doubt. He does not appear to be found anywhere north of that river, and it is quite certain that the few specimens attributed to the north coast of the Gulf of Guinea do not belong to that territory. On the south the boundary of his habitat starts from the coast, at a point near the fifth parallel, curves slightly northward, crosses the Congo near Stanley Pool, pursues a northeasterly course to about the middle of the Congo State, and again curves southward across the Upper Congo, not far from the north end of Lake Tanganyika. Its limits appear to conform more to isothermal lines than to the rigid lines of geography. Specimens are sometimes secured by collectors beyond these limits, but, so far as I have been able to ascertain, they have been captured within the territory thus bounded. There are several centers of population. This ape is not strictly confined to any definite topography, but occupies alike the upland forests or the low basin lands. In one section he is known to the natives by one name, and in another by a name entirely different. The name _chimpanzee_ is of native origin. In the Fiote tongue the name of the ape is _chimpan_, which is a slight corruption of the true name. It is properly a compound word. The first syllable is from the Fiote word _tyi_, which white men erroneously pronounce like “chee.” It means “small,” or inferior, and it is found in many of the native compounds. The last syllable is from _mpa_, a bushman; hence the word literally means, in the Fiote tongue, “a small bushman,” or inferior race. The name really implies the idea of a lower order of human being. Among other tribes a common name of the ape is _ntyigo_. The latter is derived from the Mpongwe word _ntyia_, blood, race, or breed, and the word _iga_, the forest. It literally means the “breed of the forest.” The same idea of its being a low type of humanity is involved in the two names. Both convey the oblique suggestion that the animal is more nearly allied to man than other animals are.