^{page 565 note 1} Abstract of communication made to Section C, British Association for the Advancement of Science, Bristol Meeting, September 9, 1898.

^{page 565 note 2} American Journal of Science., vol. xiv (11, 1877), pp. 338–378.Google Scholar

^{page 566 note 1} Proceedings of the Royal Society of London., vol. xxxi (1887), pp. 441–3.Google Scholar

^{page 569 note 1} Quart. Journ. Geol. Soc., 02, 1898, pp. 119–134, pl. viii.Google Scholar

^{page 569 note 2} Read before Section C (Geology), British Association, Bristol Meeting, September, 1898.

^{page 570 note 1} Read before Section C (Geology), British Association, Bristol Meeting, September, 1898. See also earlier Report, 1878, pp. 183–185.