(1) 'Geology of Yorkshire,' vol. ii.; 'The Mountain Limestone District.' John Phillips. (2) 'Siluria.' Sir Roderick Murchison. (3) 'Memoirs of the Geological Survey of Great Britain and Ireland.' (4) 'Geological Report on Londonderry,' &c. Portlock. (5) 'Acadian Geology.' Dawson. (6) 'Geology of Iowa,' vol. i. James Hall. (7) 'Reports of the Geological Survey of Illinois' (Geology and Palæontology). Meek, Worthen, &c. (8) 'Reports of the Geological Survey of Ohio' (Geology and Palæontology). Newberry, Cope, Meek, Hall, &c. (9) 'Description des Animaux fossiles qui se trouvent dans le Terrain Carbonifère de la Belgique,' 1843; with subsequent monographs on the genera _Productus_ and _Chonetes_, on _Crinoids_, on _Corals_, &c. De Koninck. (10) 'Synopsis of the Carboniferous Fossils of Ireland.' M'Coy. (11) 'British Palæozoic Fossils.' M'Coy. (12) 'Figures of Characteristic British Fossils.' Baily. (13) 'Catalogue of British Fossils.' Morris. (14) 'Monograph of the Carboniferous Brachiopoda of Britain' (Palæontographical Society). Davidson. (15) 'Monograph of the British Carboniferous Corals' (Palæontographical Society). Milne-Edwards and Haime. (16) 'Monograph of the Carboniferous Bivalve Entomostraca of Britain' (Palæontographical Society). Rupert Jones, Kirkby, and George S. Brady. (17) 'Monograph of the Carboniferous Foraminifera of Britain' (Palæontographical Society). H. B. Brady. (18) "On the Carboniferous Fossils of the West of Scotland"--'Trans. Geol. Soc.,' of Glasgow, vol. iii., Supplement. Young and Armstrong. (19) 'Poissons Fossiles.' Agassiz. (20) "Report on the Labyrinthodonts of the Coal-measures"--'British Association Report,' 1873. L. C. Miall. (21) 'Introduction to the Study of Palæontological Botany.' John Hutton Balfour. (22) 'Traité de Paléontologie Végétale.' Schimper. (23) 'Fossil Flora.' Lindley and Hutton. (24) 'Histoire des Végétaux Fossiles.' Brongniart. (25) 'On Calamites and Calamodendron' (Monographs of the Palæontographical Society). Binney. (26) 'On the Structure of Fossil Plants found in the Carboniferous Strata' (Palæontographical Society). Binney. Also numerous memoirs by Huxley, Davidson, Martin Duncan, Professor Young, John Young, R. Etheridge, jun., Baily, Carruthers, Dawson, Binney, Williamson, Hooker, Jukes, Geikie, Rupert Jones, Salter, and many other British and foreign observers. CHAPTER XIV. THE PERMIAN PERIOD.