[28] pp. 111, 534.
[29] Nov. 13, 1884, pp. 29-35.
[30] See Nature, Jan. 24, 1901, p. 294.
[31] "Text-Book," p. 678.
[32] See Zittel, "History of Geol.," pp. 210, 211.
[33] See p. 39 of this volume.
[34] "Intro. Text-Book," p. 189.
[35] "Manual," p. 1007. Prof. Dana has italicized the word "suddenly."
[36] Howorth, "The Glacial Nightmare and the Flood," preface, xx, xxi.
[37] "Mammals, Living and Extinct," pp. 428-9.