[979] Ibid.

[980] Ulloa's Voyage. Wood's Zoog. vol. i. p. 9.

[981] Buffon, vol. v. p. 100. Ulloa's Voyage, vol. ii. p. 220.

[982] Travels in Iceland in 1810, p. 342.

[983] Maclaren, art. America, Encyc. Brit.

[984] See a note on this subject, chap. x. p. 157.

[985] See above, p. 317.

[986] Darwin's Journal, p. 156., 2d ed. p. 133. Sir W. Parish,
Buenos Ayres, &c. p. 371. and 151.

[987] See above, chap. vii. p. 112.

[988] See above, chaps. vi. vii. and viii.

[989] Journ. of Nat. Hist. &c. 2d edit., 1845, p. 175; also
Lyell's 2d Visit to the United States, vol. i. p. 351.

[990] This and the preceding chapter, on the causes of
extinction of species and their present geographical
distribution, are reprinted almost verbatim from the original
edition of the second volume of "The Principles," published in
January, 1832. It was I believe the first attempt to point out
how former changes in the geography and local climate of many
parts of the globe must be taken into account when we endeavor
to explain the actual provinces of plants and animals, the
changes alluded to having been proved by geological evidence
to be subsequent to the creation of a great proportion of the
species now living, and these having been, according to the
view which I advocated, introduced in succession, and not all
at one geological epoch. In my third volume, published in May,
1833, I announced my conviction that the greater part of the
existing Fauna and Flora of Sicily were older than the
mountains, plains, and rivers, which the same species of
animals and plants now inhabit. (Prin. of Geol., vol. iii. ch.
ix.; repeated in Elements of Geol., 2d edit., vol. i. p. 297.)
This line of reasoning has since been ably followed up and
elucidated by Professor E. Forbes in an excellent paper
(published in 1846) already alluded to. (See page 86.)

[991] Essai Elamentaire, &c. p. 46.

[992] Geog. des Plantes. Diet. des Sci.

[993] See Catalogue of Brit. Insects, by John Curtis, Esq.

[994] See some good remarks on the Formation of Soils,
Bakewell's Geology, chap. xviii.

[995] See Professor Sedgwick's Anniversary Address to the
Geological Society, Feb. 1831, p. 24.

[996] Treatise on Rivers and Torrents, p. 5. G