The Cape Buffalo, which is found all over Africa south of the equator, is replaced in the north-eastern portion of the continent by a smaller variety, of a browner colour, and with much shorter horns, which are not closely approximated at their bases, at the same time that they spread out almost horizontally instead of curving downwards and backwards. [Illustration: ANOA.] In western and the western-equatorial parts of Africa there is again another still smaller variety in which the hair is yellowish-red instead of nearly black or brown, the short horns being, as well, directed considerably upwards instead of directly outwards. In the Island of Celebes the smallest species of Buffalo is found, which differs but little in appearance from the young of the Cape species. It is known as the ANOA; is black, with short, wavy hair, and has short, parallel prismatic horns directed upwards from the forehead. THE PRONGHORN ANTELOPE.[26] This Antelope of North America, one of the few forms of the Hollow-horned Ruminants which inhabit the New World, is different from all the other members of the group in two respects at least, namely, that its horns are branched, as implied in the name, and that they are annually shed. The accompanying figure is a side view of the skull of the animal, whose size is nearly that of a Fallow Deer, although its build is not so heavy. It is there seen that each horn-core forms a blade-shaped projection six inches long, with the pointed end behind, situated above the eyes perpendicular to the line of the face, rounded posteriorly and sharpened in front. Each horn itself is a foot or so in its greatest length, is pointed and gently curved backwards, at the same time that from the front of it, very slightly above the middle of its height, a short branch arises which is directed forwards, the whole there dividing into two. Each horn is flattened from side to side, is not annulated, and in its structure scarcely differs from that of a Sheep or Goat. For some years before it was certainly known to be the case, it had been rumoured by the hunters of Fort Union that the Pronghorn Antelope shed its horns each year; and in the year 1858 Dr. C. A. Canfield, of Monterey, California, in writing to Professor Baird, of the Smithsonian Institution, Washington, informed him that in specimens in his possession “their horns drop off annually.” This letter remained unprinted until in England Mr. A. D. Bartlett, Superintendent of the Zoological Gardens in Regent’s Park, London, in 1865 drew attention to the same fact, which was observed by him in a male animal living in the Gardens at the time. [Illustration: SKULL OF THE PRONGHORN ANTELOPE.]