[3]. Ibid. p. 347, 367.
[4]. Ibid. p. 337. Pl. 26. fig. 7.
[5]. Philosophical Transactions, vol. lviii. p. 34. (1768.)
[6]. Bridgewater Treatise, p. 139.
[7]. Geological Transactions, vol. iii. p. 437. pl. 44, 45, 46.
[8]. Quoted by Cuvier, Ossem. Foss. Ed. iv. tom. ii. p. 351.
[9]. Τοξον, arcus; οδους, dens.
[10]. Mem. de l’Acad. des Sciences de Paris, 1764, p. 568.
[11]. True fangs exist only in teeth of temporary growth, they may be one or more in number, but always diminish in size as they recede from the crown of the tooth, and are either solid, or with a very small canal.
[12]. This was written before an examination of the fragment of a lower jaw, forming part of Mr. Darwin’s collection of Fossil Remains, had led me to suspect that it was referrible to the genus Toxodon; should this suspicion prove correct, the four unequal incisors of the upper jaw are opposed to six equal sized ones in the lower.