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slightly through domestication. It is, however, said not to cross in a state of nature with the Gaur.[1]

Fig. 166.—Gayal. Bos frontalis. × 120.

The Banteng, B. sondaicus, is distributed through Chittagong, Tenasserim, and the Malay Peninsula to Java and Borneo. There are apparently two races of this animal. The species differs from the others by the fact that the horns are smaller and more curved; there is a white caudal disc; the forehead is narrower and the skull longer than in the others.

The American Bison and the European Aurochs form another section; they are indeed extremely alike, specific differences being hardly recognisable. The Bison of America, formerly present in such numbers that the prairies were black with countless herds, has now diminished to about a thousand head.

One of the largest of existing Bovidae is the Aurochs, Wisent, or European Bison, Bos bonasus (or Bison europaeus). It is exceedingly like its American relative. Formerly the animal was much more widely spread than it is now, extending its range from Europe into North America. It is now limited to certain districts on the Urals, in the Caucasus, and a herd of them are kept up through the fostering care of the Emperor of Russia in the forest of Bielovege in Lithuania. The term "Aurochs" should not really be applied to this species but to the Wild Cattle, Bos taurus. It is, however, so generally used for the Wisent (which is the German name) that it

  1. See Proc. Zool. Soc. 1890, p. 592.