The Mpongwéss negroes call the Chimpanzee _Enge-eko_, and the Gorilla _Enge-ena_; whence the surname of "Gina," linked to the zoological appellation of "Gorilla"--_Gorilla-Gina_. The Gorilla appears to be confined in the dense wooded regions of Lower Guinea, where he shuns, and, if needs be, repels the approach of man and that of the carnivorous animals, as well as of all those who attempt to penetrate into his retreats. Fierce and savage is he in his every custom; but it has never been satisfactorily demonstrated that he acts on the aggressive. He is not the less an object of extreme terror to his negro neighbours, on account of his extraordinary strength; and much more, perhaps, owing to the fantastic legends that have grown up about his name. His stature exceeds four, and sometimes attains, it is said, to upwards of six feet. The most salient characteristics of his head are the great width and elongation of the face, the development of the lower jaw, and the smallness of the osseous framework, which surrounded by a very elevated orbitary arch, whence proceeds a second ridge dominating over all the upper part of the skull. The nose is flat, the eye deep-sunken in its orbit, the ear small, the mouth very large. The lips, especially the lower one, are long and very extensible. The expression of the face is terrible, reminding one of Coleridge's painful picture of a man-monster; and especially terrible when the animal raises the shaggy skin, and reveals the enormous fangs which bristle in his jaws. His neck is thick, and so short, that the head seems grafted directly upon the shoulders. The latter are of formidable breadth, and his vast chest resounds like a drum when he beats it with his powerful fists, raising himself upright on his feet--an action which is with him a sign of mistrust, hatred, and indignation. He has a large expanded belly, like that of the orang and chimpanzee. His skin is of a deep black, naked on the face and on the palm of the hands, but elsewhere clothed with a rough iron-gray or brown-black hair. The breast of the male adult is hairless, like that of the female. With the former the hair of the back is worn off, owing to his habit of sleeping on the ground supported against a tree. This peculiarity, according to M. Du Chaillu, is only seen in the female when she has attained an advanced age, in which case it would seem to be owing to the fact that, having no longer her infants to shelter among the branches, she sleeps in the same fashion as the male. The natural walk of the Gorilla is not upon two feet, but upon four paws. In this posture, owing to the length of his arms, his head and chest are much elevated. When he runs, his hind-legs are brought up under the body. The arm and the leg on the same side move simultaneously, which gives the animal a curious and awkward gait. He runs, however, with extreme swiftness.