238 



EVOLUTION IN THE PAST 



Pelecypods {cont.) — 



Cretaceous, io8 



Eocene, 137 



Miocene, 168 



{See also under various names.) 

 Pelicans, 150 

 Pelycosaurians, 63, 77 

 Penguins, 132 

 Pentamerus, 32 

 Perch, freshwater, 168 



— sea, 106 

 Periechocrinus, 29 

 Periwinkles, 18 

 Permian Period, 61 

 Phacops, 34 

 Phalangers, 187, 207 

 Phanerogams, 3 



(See also under various plant- 



|.!fnames.) 

 Pheasants, 151 

 Phenacodus, 2, 120, 140 

 Phyllopods, 19 

 Pigeons, 151 

 Pigs. See Swine 

 Pike, 168 



— bony, 88 

 Pineapple plants, 154 

 Pinks, 154 

 Pithecanthropus, 187 

 Placentals, 117 

 Plantain-eaters, 166 

 Plants. See Vegetation 

 Platystrophia, 23 

 Pleistocene Period, 189 

 Plesiosaurians — 



Triassic, 78 



Jurassic, 94 



Cretaceous, 103 



Ancestry, 78 

 Pleuracanthus, 57, 76 

 Pliocene Period — 



Earlier Epoch, 169 



Later Epoch, 182 

 Pliopithecus, 155 

 Pliosaurus, 95 

 Plovers, 151, 166 

 Plum trees, 154 

 Pod-shrimps, 19, 26, 42, 56 

 Poebrotherium, 145 

 Polacanthus, 98 

 Polecats, 156 

 Polypterus, 105 



Polyzoans — 



Ordovician, 25 



Silurian, 32 



Devonian, 44 



Carboniferous, 55 



Permian, 66 



Triassic, 72 



Jurassic, 84 



Cretaceous, 109 



Eocene, 138 

 Poplars, 1 1 3 

 Poppies, 154 

 Porcupines, 148, 155 

 Porifera. See Sponges 

 Portheus, 105 

 Pottery, 212, 213 

 Prawns, 75, 86, 106 

 Praying insects, 152 

 Present Period, 211 

 Primates — 



Eocene, 119, 126 



Oligocene, 149 



Miocene, 154, 164 



PUocene, 172, 179, 184, 187 



{See also Apes, Lemurs.) 

 Procamelus, 158 

 Procyonidae. See Raccoons 

 Productus, 54, 66 

 Propliopithecus, 127 

 Proterotherium, 163, 186 

 Protoceras, 144 

 Protohippus, 159 

 Protospongia, 16, 21 

 Protozoans— 8 



Cambrian, 16 



Cretaceous, no 



Eocene, 138 



{See also Foraminifers, NummuUtes, 

 Radiolarians.) 

 Ptarmigan, 200 

 Pteranodon, 104 

 Pterichthys, 38 

 Pteropods, 18, 24 

 Pterosaurs, 95, 104 

 — wings of, 95 

 Puma, 206 

 Pycnodonts, 136 

 Pyrenees, 138 

 Pyrotherium, 164, 186 

 Python, 135 



