Bewick mentions that in Persia there are many oxen entirely white, with small blunt horns and humps on their backs. They are very strong, and carry heavy burdens. When about to be loaded, they drop down on their knees like the Camel, and rise again when their burdens are properly fastened. THE BORNOU OX, which Col. Smith considers a distinct species, is likewise white, of a very large size, with hunched back, and very large horns, which are couched outwards and downwards, like those of the African Buffalo, with the tip forming a small half-spiral revolution. The corneous external coat is very soft, distinctly fibrous, and at the base not much thicker than a human nail; the osseous core full of vascular grooves, and inside very cellular, the pair scarcely weighing four pounds. The skin passes insensibly to the horny state, so that there is no exact demarcation where the one commences or the other ends. The dimension of a horn are:--length measured on the curve, three feet seven inches; circumference at base, two feet; circumference midway, one foot six inches; circumference two thirds up the horn, one foot; length in a straight line, from base to tip, one foot five inches and a half. The species has a small neck, and is the common domestic breed of Bornou, where the Buffalo is said to have small horns. Leguat, in his 'Voyages in 1720,' states that the oxen are of three sorts at the Cape of Good Hope, all of a large size, and very active; some have a hump on the back, others have the horns long and pendent, while others have them turned up and well shaped, as in English cattle. [Illustration: Zebu.--(_Var. delta._)] THE DOMESTIC OXEN OF THE HOTTENTOTS, CALLED BACKELEYS, BACKELEYERS, OR BAKELY-OSSE. _Bos ----?_ The following particulars relating to these Oxen are taken from the highly interesting work '_The Present State of the Cape of Good Hope_,' by Peter Kolben, who visited that colony in 1705, and remained there during a period of eight years.