^{page 515 note 1} For those who are unable to obtain Professor Spencer's original memoir, the review thereof by Mr. A. J. Jukes-Browne, F.G.S., in the Geological Magazine for April, 1895 (p. 173), will probably suffice.

^{page 515 note 2} The isotherm of 42° passes by the north coast of the British Isles.

^{page 518 note 1} Geol. Mag. 1876, p. 238.Google Scholar

^{page 518 note 2} “Jurassic Rocks of Britain,” vol. v, 1895, p. 42.Google Scholar

^{page 519 note 1} See Rep. Brit. Assoc. 1895, p. 696.Google Scholar