Oysters—36, 39, 42, 48. Oyster-beds—36, 50. Oyster-limestone—52. P Palæogene freshwater shells—60. Palæogene vertebrate fauna—87. Palæontographica—43, 63, 88. _Palæomastodon_—10, 59, 68. _Palæomastodon Beadnelli_—34, 59, 70. _Palæomastodon minor_—34, 70. Palms—21-22. _Paludina_—81. Pangolins—69. Paper-shales—36, 51. Paris basin—58. Parisian beds—18, 35-53. Pass from Muêla to Rayan—21. Pebble deposits—18, 30, 39-40, 56, 58, 76, 78. _Pecten_—39, 42, 46-47. _Pecten benedictus_—71. _Pecten Caillaudi_—89. _Pecten corneus_—37. _Pecten moëlehensis_—37, 52, 59. _Pecten solariolum_—52. _Pectunculus_—46. _Pectunculus juxtadentatus_—90. _Pectunculus ægyptiacus_—51, 90. _Pectunculus pseudopulvinatus_—35. _Pectunculus pulvinatus_—52. _Pelomedusa progaleata_—70. Pelvis of _Arsinoitherium_—54. Perforate weathering of sandstone—46. Permeability of Wadi Rayan—24. Perennial irrigation in Egypt—88. Pharaonic province—84. Philotera—84. _Phiomia_—10. _Phiomia serridens_—34, 59, 70. _Pinna_—39, 47. Plains—50, 52, 54, 77. Plain of subaerial denudation—39. _Planorbis Ehrenbergi_—84. _Planorbis marginatus_ var. _subangulata_—84. _Planorbis subangulata_—81. Plant-remains—42, 50-51, 53, 57. Plateau bounding Fayûm to north—26. _Plateaux_—15, 21, 25, 27-28, 32, 62. Pleistocene Beds—30, 34, 47, 50, 54, 71, 79-81, 84. _Pleurotoma_—37, 43, 46, 53, 58. _Pleurotoma ingens_—34, 58. _Plicatula Bellardi_—50-51, 89. _Plicatula indigena_—89. _Plicatula polymorpha_—35, 45-46, 51. _Plicatula pyramidarum_—89. _Plicatula Schweinfurthi_—89. Pliny—82. Pliocene Beds—30, 34, 41-42, 54, 69, 71-78. Pliocene sea, Invasion of—43, 71, 78. _Pliohyrax_—69. _Podocnemis antiqua_—37, 70. _Podocnemis Blanckenhorni_—70. _Podocnemis Blanckenhorni_ var. _ovata_—70. _Podocnemis fajumensis_—70. _Podocnemis Stromeri_—35, 70. _Podocnemis Stromeri_ var. _major_—70. Pools formed by rainfall—25. Pools produced by springs—20, 22. _Potamides_—53. _Potamides scalaroides_—34, 58, 64. _Potamides tiarella_—64. _Potamides tristriatus_—34. Prehistoric epoch—81-82. Prehistoric lake—23, 79-82. Preservation of fossil remains—55. Proboscidea—68-69. Promontories of Birket el Qurûn, Origin of—41. _Propristis Schweinfurthi_—35, 51, 70. _Psephophorus eocænus_—35, 70. _Pseudodon_—58, 60. _Pterodon_—10. _Pterodon africanus_—34, 59, 70. _Pterodon macrognathus_—34, 70. _Pterosphenus_—10. _Pterosphenus Schweinfurthi_—35, 50-51, 70. Ptolemaic lake—84. Ptolemaic period—82. Ptolemy Philadelphus—84. Ptolemy the second—84. Puddingstone of ancient rivers—26, 67. Pyramid-like building—74. Pyramid pebbles—56. Q Qalamsha, Ezba—23, 25-26, 41-42, 77. Qasr el Banat—84. Qasr el Qurûn—84.