[234] _On the Vegetation of the Carboniferous Period as compared with that of the present day; On some peculiarities in the structure of Stigmaria; Remarks on the Structure and Affinities of some Lepidostrobi_: by Dr. Hooker; Memoirs of the Geological Survey, &c., vol. ii. pp. 387, 431, 440. [235] See Owen, Quarterly Journal of the Geological Society, No. 6, p. 96. Dr. Buckland, Geological Transactions, vol. iii. p. 220. _The Wonders of Geology_: by Dr. Mantell, vol. ii. p. 493. [236] _Report on British Fossil Mammalia_: by Richard Owen, Esq., F.R.S.; British Association Reports, vols. xi. xii. [237] _Notice on the Iguanodon, a newly discovered fossil reptile from the sandstone of Tilgate Forest, in Sussex_: by Gideon Mantell, Esq, F.R.S., &c.; Philosophical Transactions, vol. cxv. p. 179. _On the Structure of Teeth, &c._; by Professor Owen. [238] Dr. Mantell, _Wonders of Geology_. _Geology of the South-east of England._ [239] _Geological Researches_; _Geological Manual_; by Sir Henry Thos. De la Beche, C.B., &c. [240] Ibid. [241] _Experimental Researches on the production of Silicon from Paracyanogen_: by Samuel Brown, M.D.; Transactions of the Royal Society of Edinburgh, vol. xv. p. 229. _Experiments on the alleged conversion of Carbon into Silicon_: by R. H. Brett, Ph.D., and J. Denham Smith, Esq.; Philosophical Magazine, vol. xix. p. 295, New Series. See also Dr. Brown’s reply to the above, ibid, p. 388. [242] _Geology, Introductory, Descriptive, and Practical_: by Prof. Ansted, vol. ii. p. 22. [243] _The Wonders of Geology_: by Dr. Mantell, vol. i. p. 162. _Bridgewater Treatise_: by Dr. Buckland. Dr. J. J. Kemp, and Dr. A. V. Klipstein, _On the Dinotherium_; Darmstadt, 1836. Cuvier and De Blainville have also carefully described the fossil remains of this animal. [244] See Professor Ramsay’s memoir _On Denudation_: Memoirs of the Geological Survey of Great Britain.