^{page 357 note 1} Being a Lecture delivered at the Royal Institution of Great Britain, on Friday, 02 7, 1868.Google Scholar

^{page 357 note 2} The only complete and systematic statement of the doctrine with which I am acquainted is that contained in Mr. Herbert Spencer's “System of Philosophy,” a work which should be carefully studied by all who desire to know whither scientific thought is tending.

^{page 361 note 1} The fossil has been described by Professor Owen in the “Philosophical Transactions” for 1863.Google Scholar

^{page 362 note 1} It will be understood that I do not suggest any direct affinity between Pterodactyles and Bats.

^{page 363 note 1} The so-called “coracoid” of Megalosaurus is the ilium. I am indebted to Professor Phillips, and to the splendid collection of Megalosaurian remains which he hag formed at Oxford, for most important evidence touching this reptile.

^{page 366 note 1} Vide “The Microscope in Geology,” Popular Science Review, vol. vi., 10. 1867, p. 355, et seq.Google Scholar

^{page 368 note 1} Everything in Nature appears, faster or slower, to become more or less altered.

^{page 369 note 1} Also πέτρα, whence the synonym Petralogy. In the, for its time, very excellent treatise on rocks—Pinkerton's “Petralogy,” 2 vols. London, 1811—the distinction between Lithology and Petralogy is fully explained.Google Scholar