[148] J. Geikie, Prehistoric Europe, London, 1881.
[149] Horses, Asses, and Zebras, London, 1895.
[150] Proc. Zool. Soc. 1884, p. 540.
[151] Proc. Zool. Soc. 1895, p. 688.
[152] See Pocock, Ann. Nat. Hist. (6) xx. 1897, p. 33.
[153] "Das Quagga," Zool. Garten, 1893, p. 289.
[154] Of this Horse, remains have been lately discovered (see Lönnberg, Proc. Zool. Soc. 1900, p. 379) in the cave which produced the remains of Glossotherium. A piece of skin covered with Fox-red hair, possibly spotted with paler areas, is believed to be a relic of Onohippidium.
[155] Trans. American Phil. Soc. xviii. 1896, p. 55.
[156] T. leucogenys and T. ecuadorensis are probably not distinct, the latter being in reality T. terrestris, the former T. roulini.
[157] See Beddard, Proc. Zool. Soc. 1889, p. 252, and other papers there cited, for the anatomy of the Tapir.