[58] "Geol. and Min.," Vol. I., pp. 124-5. Ed. 1858.
[59] "Theoretical Geol.," p. 265. London, 1834.
[60] "Old Red Sandstone," pp. 48, 221-2.
[61] Pop. Sci. News, May, 1902, pp. 106-7.
[62] "Histor. Geol.," p. 53.
[63] "Acadian Geol.," p. 260.
[64] "Mammals," p. 430.
[65] "On Certain Phenomena, etc.," pp. 50-52.
[66] "Ancient Life-History," p. 300.
[67] "Manual," p. 736.