ix. LIST OF PLATES AND ILLUSTRATIONS. Plate I. (Frontispiece). Pleistocene Mammalia, facing p. 1. Plate II. Bos primigenius, fort- limb from Ilford, facing p. 8. Plate III. Edward North Bux- ton, D.L., J.P., facing p. 12. Plate IV. Autograph Letters from Charles Darwin, facing p. 14. Nesting-tube for Leaf-cutter Bees, p. 27. Nesting-tube for Leaf-cutter Bees, p. 28. Plate V. Site of the Elephant- Bed of Clacton-on-Sea, facing p. 34. Plate VI. Lower Jaws of Elephas antiquus from Clacton, facing p. 36. Plate VII. Trouessartella falcata from Epping Forest, facing p. 50. Plate VIII. The "Chip-Chap' Club, facing p. 64. Plate IX. Prehistoric Implements, facing p. 69. Plate X. Prehistoric Implements, facing p. 75. Plate XI. William Whitaker, B.A., F.R.S., F.G.S., facing p. 93. Plate XII. Hyracotherium lepori- num from Harwich, facing p. 97. Hyracotherium leporinum, p. 100. Pollen spectra, p. 109. Plate XIII. Claygate Beds at Rayleigh, Bagshot Sands at Rayleigh, facing p. 115. Chromatium Okenii, p. 155. Plate XIV. Samuel Willingale, facing p. 157. Plate XV. Alfred Willingale. facing p. 163 Plate XVI. "William Higgins, facing p. 165. Plate XVII. Forest Lodge, Hat- field Forest, facing p. 189. Plate XVIII. "Teeth of Ptychodus polygyrus, facing p. 197, Mandible of Ptychodus decurrens, p. 199. Ctenothrissa microcephala, p. 202. Leptotrachelus triqueter, p. 203. Eurypholis Boissieri, p. 203. Alepidosaurus ferox, p. 204. Hoplopteryx lewesiensis, p. 205. Hoplopteryx affinis, p. 205. Plate XIX. Alfred Bell, facing p. 209. Plate XX. Pillow Mounds at High- beach, facing p. 214. Sketch map of Pillow Mounds at Highbeach, p. 215. Section across Mounds D. and B., p. 217. Section across Mound S., p. 218. Sketch map of high-level gravels in Essex, p. 252. Sketch map of the ice-margin in Glacial times in Essex, etc., p. 259. Plate XXI. The Swallow-tailed Kite, facing p. 260. Plate XXII. "Pwdre Ser," facing p. 271. Plate XXIII. (folding plate). Map of the Rivers and River Basins of Essex, facing 278. [The Editor wishes to express his indebtedness to Mr. W. H. Dalton, F.G.S., for his kindness in preparing this Index.]