[146] See E.B. Poulton, P.R.S., Feb. 1888, and Quart. J. Micr. Sci., Vol. XXIX. 1889; also Oldfield Thomas, P.R.S., XLVI. (1889).
[147] W.H. Flower, Phil. Trans., vol. 156, pp. 631—641, 1867; also Oldfield Thomas, Phil. Trans., pp. 443—462, 1887.
[148] C. Röse, Anat. Anz. VII., p. 639.
[149] W. Kükenthal, Anat. Anz. VI., p. 364.
[150] See p. 348.
[151] W. Leche, Morph. Jahrb. XX., pp. 113—142 (1893).
[152] E.C. Stirling, P.Z.S. 1891, p. 327.
[153] O. Thomas, P.Z.S., 1895, p. 870.
[154] F. Ameghino, Bull. Ac. Argen. XII. p. 437. According to H. Burmeister, Annal. Mus. Buenos Aires, III. 401 (1891), enamel does not occur, osteodentine having been mistaken for it.
[155] E. Ballowitz, Arch. Mikr. Anat. XL. p. 133.