[60] G.A. Boulenger, P.Z.S. 1890, p. 664.
[61] See p. 15.
[62] See many papers by W.K. Parker published in the Phil. Trans. of the Royal Soc.
[63] Perhaps this bone includes supra-orbital and postorbital elements.
[64] The first digit present is sometimes regarded as the pollex, but from analogy with Anura it is probable that the pollex is the missing digit.
[65] According to Baur a distinct epi-otic is not recognisable in the reptilian skull.
[66] H. Gadow, Phil. Trans., vol. 179, 1888.
[67] See G. Baur, J. Morph., vol. I., 1887. R. Lydekker, Catalogue of the Fossil Reptilia and Amphibia in the British Museum, Parts I. & II. C.K. Hoffmann, Reptilien, in Bronn's Classen und Ordnungen des Thierreichs, Bd. VI., 3 abth. 1879-90.
[68] T.H. Huxley, Quart. J. Geol. Soc., vol. xv. p. 649, 1859. R. Owen, Catalogue of Fossil Reptiles of S. Africa in the British Museum, London, 1876. H.G. Seeley, various papers published in the P.R. Soc. London, and Phil. Trans.
[69] See pp. 281-283.