[178] Dr. Garson has investigated its anatomy, Proc. Zool. Soc. 1883, p. 413, and states that its differences from Sus are "unimportant and few."
[179] "On the Species of Potamochoerus," Proc. Zool. Soc. 1897, p. 359.
[180] Marsh, Amer. Journ. Sci. xlvii. 1894, p. 407.
[181] Osborn, Bull. Amer. Mus. Nat. Hist. vii. 1895, p. 102.
[182] Marsh, Amer. Journ. Sci. xlviii. 1894, p. 262.
[183] For the structure of Tragulus, see Milne-Edwards, Ann. Sci. Nat. (5) ii. 1864, p. 49.
[184] Marsh, Amer. Journ. Sci. 1897, p. 165.
[185] This is the winter dress. In the summer both camels lose their long rough hair.
[186] See Wortman, Bull. Amer. Mus. Nat. Hist. x. 1898, p. 93.
[187] "Osteology of Poebrotherium," Journ. Morph. v. 1891, p. 1.