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Published online by Cambridge University Press: 01 May 2009
Although unwilling to admit that in the history of our Earth special and peculiar conditions have prevailed at any period since the first advent of organic beings, yet we cannot doubt, that during particular eras, circumstances favoured the development of special groups of organisms which, in consequence, flourished in greater perfection and numbers than the rest.
page 493 note 1 The specimens referred to are in the collections lately acquired by the British Museum from the Van Breda Museum at Haarlem.
page 494 note 1 Acanthopholis horridus, Huxley. Geol. Mag., 1867. Vol. IV., p. 65. PI. V.Google Scholar
page 494 note 2 See Quart. Journ. Geol. Soc., vol. xxvi., 1870, p. 326.Google Scholar
page 494 note 3 Iguanodon, Hylœsaurus, Hypsilophodon, Streptospondylus, Megalosaurus, etc.
page 494 note 4 See Prof. Owen's Monograph on “the Fossil Mammals of the Mesozoie Formations’ Pal. Soc. vol. xxiv. 1871.Google Scholar
page 495 note 1 See ProfRamsay, , F.R.S., “On the Red Rocks of England,” etc., Quart. Journ. Geol. Soc., 1871, vol. xxvii., p. 189, and p. 241.CrossRefGoogle Scholar
page 497 note 1 Later experiments have, however, proved that plants, like animals, are at once poisoned by an excess of carbonic acid.
page 498 note 1 Chemical investigation shows that at the present day there is probably as much or more carbonic acid in the atmosphere in a free state as is in the whole mass already fixed as carbon by plants and animals on the surface, and by all the coal-seams put together.
page 499 note 1 Indeed no green leaf can be formed without sunlight, for the Chlorophyll is not developed in plants living in the dark or shade.
page 500 note 1 Read also before the British Association, Edinburgh, Section C, August, 1871.
