LIST OF ILLUSTRATIONS IN THE TEXT. 



PAGE 



Cupressinoxylon hookeri, E. A. Newell Arber, sp. nov 9, 10 



Partially Silicified Crystalline Limestone 17 



Suture-line of Pericyclus fasciculatus 29, 30, 31 



Tongue of Clay in Chalk 73. 



Middle portion of above, enlarged 73 



^'kxiiil oi Mmritherium 110 



^'k\ji}i\. oi Palceomastodon 113 



Section showing junction between the Lias and Cretaceous 125 



General Section of Black Yen 127 



Junction between the Selbornian and Lias of Black Yen 128- 



Section in the Selbornian of Black Yen 130 



Lower Keuper basement-beds 171 



Sketch-map of Afon Seiont below Pout Seiont 201 



Sketch-map of Kant Ehos Ddu 20.5 



Section across Nant Ehos Ddu 206. 



Diagram- Section of Gonatosphmra 242 



Diagram to illustrate the Phylogeny of JVodosaria and allied forms .... 249 



Succession of beds in the folded region of Cape Colony 253 



Eocene outcrop in Central Africa 291 



Pksiolampas Saharce, Bather, sp. nov 294 



Contorted pegmatite vein in granite, Sweden 310' 



Folded pegmatite in a sett quarry, Sweden 310 



Contorted pegmatite in gneiss, Sweden 311 



Pegmatite vein in granite, SAveden 312 



Curves showing the frequency of branching in Stomatopora 320 



Diagram showing method of branching in 6'i!ow«^o^(M-«! and Proi^oscmfl! . . . 321 



Plan of the Graben System and its relation to the Congo Basin 355 



Section across British East Africa 357 



Section of the Lower Congo between the Atlantic and Stanley Pool .... 361 



Structure of a Graben 368 



Hollow in granitic block 389 



Sections to illustrate Dr. Bonney's paper 389, 390 



