DISTRIBUTION.--West Africa. Forests of Fanti and Ashanti. II. THE RED-CRESTED GUEREZA. COLOBUS RUFOMITRATUS. _Colobus rufomitratus_, Peters, M. B. Akad. Berl., 1879, p. 829, pl. iA. and ii. _Tropicolobus rufomitratus_, Rochebr., Faun. Sénég., Mamm., Suppl., p. 102 (1887). CHARACTERS.--Body thick-set and covered with short hair; face {89}and ears naked and brownish-black, the long superciliary hairs and the transverse crest, from ear to ear, black; front and back of the head to the nape of the neck brownish-red; cheeks and chin dark grey; back, from the nape of the neck, flanks, outer and hinder surfaces of the limbs, and the feet, dark brownish-olive; front of the shoulder, of the arm and part of the fore-arm, and the front of the thighs, pale reddish-yellow; breast, under side of the body and inner side of the limbs, of the same colour, but paler; tail coloured like the back, the tip tufted, brownish-black. Length of body, 26¾ inches; tail, 27¾. DISTRIBUTION.--This very rare species lives in East Africa. Forests at Muniuni, near Mombasa. III. KIRK'S GUEREZA. COLOBUS KIRKI. _Colobus kirkii_, Gray, P. Z. S., 1868, p. 180, pl. xv.; id., Cat. Monkeys Brit. Mus., p. 127 (1870); Schl., Mus. Pays-Bas, vii., p. 25 (1876); Kirk, Ann. and Mag. N. H. (5), xiii., p. 307 (1884). _Guereza kirkii_, Trouess., Consp. Mamm., p. 14 (1879). _Piliocolobus kirki_, Rochebr., Faun. Sénég., Mamm. Suppl., p. 112, pl. vi. (1887). CHARACTERS.--Face and ears naked, bluish-black; tip of the nose greyish-white; head, with long divergent hairs, forming a kind of cap, bent backwards over the forehead; crown of head, back, and tail, reddish-brown, paler towards the extremity; the nape, shoulders, arms, outer and anterior aspects of the fore-arms, the centre of the outer aspect of the thighs and legs, and the hands and feet, black; forehead, cheeks, chest, front aspect of the shoulders, the whole of the under side of the body, {90}and the inner side of the limbs, white; anterior aspect of the lower part of the arm, the hind-margin of the fore-arms, and the anterior and posterior aspects of the thighs and legs, greyish-white. (_Gray._) Length of body, 25½ inches; of tail, 31 inches. DISTRIBUTION.--Island of Zanzibar. This Monkey was first sent to Europe by Sir John Kirk in 1868. Its discoverer, writing in 1884, says that even in 1868 the Monkey was rare, but was still to be found in many of the wooded districts of that island. He writes: "I am not aware that it has been found in Pemba Island or on the mainland; and now I discover that, if not extinct, it has become so rare as not to be procurable, even when I sent the hunters over the island. I have a report that it exists still in one spot, which they could not reach. I believe that two specimens were sent to Germany some time ago; but it looks as if the animal will be lost to science. This is due to the destruction of forest and jungle over the island."