1868, Charles Darwin, The Variation of Animals and Plants Under Domestication, Vol. I. Chapter , Besides these three species and the zebu, the yak, the gayal, and the arni190 (not to mention the buffalo or genus Bubalus) have been domesticated; making altogether seven species of Bos.
1904, Arthur Erwin Brown, American Big Game in Its Haunts Chapter The Zoology of North American Big Game, In the arni of India they are enormously long.
