Act i. Azoic: Conflict of Inorganic Forces. Act ii. Paleozoic: Age of Invertebrates. { Scene i. Eozoic: Enter Protozoans and Protophytes. { " ii. Silurian: Enter the Army of Invertebrates. Primary { " iii. Devonian: Enter Fishes. { " iv. Carboniferous: (Age of Coal Plants) Enter First _Air_ breathers. Act iii. Mesozoic: Enter Reptiles. { Scene i. Triassic: Enter Batrachians. Secondary { " ii. Jurassic: Enter huge Reptiles of Sea, Land { and Air. { " iii. Cretaceous: (Age of Chalk) Enter Ammonites. Act iv. Cenozoic: (Age of Mammals.) { Scene i. Eocene: Enter Marine Mammals, and probably { _Man_. Tertiary { " ii. Miocene: Enter Hoofed Quadrupeds. { " iii. Pliocene: Enter Proboscidians and Edentates. Act v. Post Tertiary: _Positive_ Age of Man. { Scene i. Glacial: Ice and Drift Periods. { " ii. Champlain: _Sinking Continents_; Warmer; { Tropical Animals go _North_. Post Tertiary { " iii. Terrace: Rising Continents; Colder. { " iv. Present: Enter Science, Iconoclasts, &c., &c. [29:3] Draper: Religion and Science, p. 199. [29:4] Ibid. pp. 195, 196. [30:1] Huxley: Man's Place in Nature, p. 184. [30:2] Paschel: Races of Man, p. 36. [30:3] Tylor: Early History of Mankind, p. 328. [30:4] Ibid. pp. 329, 330 [30:5] We know that many legends have originated in this way. For example, Dr. Robinson, in his "Travels in Palestine" (ii. 586), mentions a tradition that a city had once stood in a desert between Petra and Hebron, the people of which had perished for their vices, and been converted into stone. Mr. Seetzen, who went to the spot, found no traces of ruins, but a number of stony concretions, resembling in form and size the human head. _They had been ignorantly supposed to be petrified heads, and a legend framed to account for their owners suffering so terrible a fate._ Another illustration is as follows:--The Kamchadals believe that volcanic mountains are the abode of devils, who, after they have cooked their meals, fling the fire-brands out of the chimney. Being asked what these devils eat, they said "_whales_." Here we see, _first_, a story invented to account for the volcanic eruptions from the mountains; and, _second_, a story invented to account for the _remains of whales found on the mountains_. The savages _knew_ that this was true, "because their old people had said so, and believed it themselves." (Related by Mr. Tylor, in his "_Early History of Mankind_," p. 326.)