viii List of Illustrations in the Text. 



Dene Hole at Hangman's Wood 452 



Outline of associated head-bones, etc., of Coslacanthus Kayseri (Von Koenen) . 530 



Deformed example of Hopliies tuberculatus, J. Sowerby, G-ault, Folkestone 



(three views) 542 



Diagrams of the upper or actinal surface and vertical section of Dinocystis . 545 



Sketch of section on shore below Treborth 560 



Hypothetical section through the Menai Straits between the bridges .... 561 



Section in the Gravel Pit near Martley 563 



Ground- plan of same 563 



Diaaram-section to illustrate Glacier-motion 565 



