EXPLANATION OF THE PLATES AND WOODCUTS. 



PLATES XXIL and XXIIL 



Plates of Fossils to illustrate Mr. D. Sharpe's description of the Secondary Fossils from South 



Africa ; for explanations, see p. 228. 



PLATES XXIV.-XXVIL 



Plates of Fossils to illustrate Mr. D. Sharpe's and Mr. Salter's descriptions of the Palaeozoic 

 Fossils from South Africa ; for explanations, see p. 229. 



PLATE XXVIIL 



Plate of Fossils to illustrate Mr. D. Sharpe's, Dr. Hooker's, and Sir P. G. Egerton's descrip- 

 tions of Fossils from South Aft'ica; for explanation, see p. 231. 



PLATES XXIX.-XXXIL 



Plates of Fossils to illustrate Prof. Owen's paper on the Skull of Dicynodon tigriceps; for 



explanation, see p. 240. 



PLATES XXXIIL and XXXIV. 



Plates of Fossils to illustrate Pxof. Owen's paper on parts of the Skeleton of Dicynodon tigri- 



ceps ; for explanation, see p. 247- 



WOODCUTS 



To illustrate Mr. Hopkins's paper on the Wealden and the Bas Boulotmais, p. 1. 

 Page A. fig. 1. Diagram of a line of flexure. 



\o.fig. 2. Section of the Pulborough line of flexure. 



18. fig. 3. Section of the Cretaceous and Tertiary beds near Guildford. 

 fig. 4. Section through Margaret's Chapel Hill, near Guildford. 



19, fig. 5. Section through Dorking. 



24. fig. 6. Section of the Medina Valley, near Rookley. 



33. fig. 7- General Section across the Weald. 



34. fig. 8. General Section west of the Wealden denudation. 



fig. 9. General Section along the axis of the Wealden District, from the Bas Boulonnais 

 to Wiltshire. 



