[156] See Oldfield Thomas, P.R.S., vol. XLVII., p. 246 (1890).
[157] J. Taeker, "Fur Kenntniss der Odontogenese bei Ungulaten." Dorpat, 1892.
[158] See p. 345.
[159] See p. 345.
[160] According to H.F. Osborn, Amer. Natural., XXVI. p. 763, a number of not very closely allied forms have been included under Lophiodon.
[161] C. Earle, J. Ac. Philad., vol. IX., 1892, p. 267.
[162] Encyclopaedia Britannica, article Mammalia, p. 424.
[163] See T.H. Huxley, "The dental and cranial characters of the Canidae," P.Z.S., 1880, p. 238.
[164] G.B. Howes, Journ. of Anat. and Phys. XXVII., p. 544.
[165] The figure was drawn from a photograph and the size of the jaws relatively to the cranium is exaggerated.