Concretionary weathering—42, 46. Conglomerate—25, 74-76, 78. Conical hill near Wadi Muêla—36. Coniferous fossil trees—63. Constancy of beds over wide areas—33. Continental land in Oligocene times—64. Continuance of Oligocene continental conditions—54. Cope Whitehouse—16-17. Coprolites—50-51, 62. Corals—36-37, 44, 46, 51, 53. _Corbicula Blanckenhorni_—90. _Corbicula fluminalis_, var. _consobrina_—81, 84. _Corbula_—40. _Corbula_ aff. _pixidicula_—35, 39, 43. Cossmann, M.—45, 58, 87. _Cossmannella ægyptiaca_—50. Cranial casts in limestone—52. _Crassatella fajumensis_—90. _Crassatella Junkeri_—90. _Crassatella puellula_—90. _Crassatella trigonata_—90. _Crassatellithes_—50. Creodonts—70. Crocodiles—9, 34, 51-55, 59, 62, 80. _Crocodilus_—59, 70. Crystals of quartz, calcite &c.—61. _Cucullæa_ aff. _crassatina_—52. _Cucullæa dimehensis_—89. Cultivated lands—9, 11-14, 39-42, 73, 83-84. Currents in Birket el Qurûn—14. Currents in ancient river—52, 54, 65-66, 71-78, 80. Current-bedded clays, sands, &c.—51, 56. Cuvier—69. _Cyprina ægyptiaca_—90. _Cyrena Blanckenhorni_—90. _Cytherea_—46. _Cytherea Newboldi_—43. D Dakhla Oasis—29. Dam at El Lahûn—84. Dames—9, 43-44, 49, 87. Damp climate formerly in Egypt—81. Dashûr, Pyramids of—28. Dasypodidae—69. Defile of Wadi Muêla—9, 21. Delta, Ancient—54, 66-67. _Dentalium_—46. Denudation, Effects of—39, 73, 75, 77, 84. Deposition of sediments in Eocene times—54. Depression, Origin of Fayûm—15, 29, 33, 79. Depression cut out in sedimentary rocks—33. Depression, Fayûm—9, 11-16, 20, 24, 26-30, 33-36, 39, 53, 61, 64, 67, 71, 75, 77-81, 84-85, 87-88. Depression, Mogara—71. Depression, Wadi Rayan &c.—17-19, 21-24. Depressions of Libyan Desert—16, 29, 67. Depth of Birket et Qurûn—13. Der el Beda—64. Der el Galamûn—21, 36. Desert conditions—73, 79. Desert region—11, 14, 16, 26-28. Deshasleh—17. _Dictyopleurus Haimi_—52. Diluvial deposits—81. Dimê—13, 31, 45, 50, 72. Dinotheres—69. Diodorus Siculus—13, 82. Dionysias—83-84. Dip, Importance and nature of—15, 33, 48-49, 55, 57, 64. _Diplodonta corpusculum_—90. _Diplodonta cycloidea_—90. _Diplodonta inflata_—90. Dip-slopes of central area &c., of Fayûm—24, 25, 27, 50. Disconnection of Nile Valley and Fayûm—80. Dormice—69. Downthrow of faults—32, 50. Drainage basins—11, 13, 23, 25. Drains—12. Dreikanter—56. Druses of calcite—62. Dugongs—53. Dunes—17, 21-23, 26-27, 84-85. Dunes, Slope of—26. Dunes, Straight-lined character of—26, 85. E Earth-pillars—46. Earthy limestone—46. Echinids—36-37, 39. _Echinolampas Crameri_—35, 50. Edentata—69. Edwa—82-83. Egyptian irrigation—88. Elephants, Early—68. _Elephas_—80. El-Gayat, village—20.