238 



EVOLUTION IN THE PAST 



Pelecypods (cont.) 



Cretaceous, 108 



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- 



$i names.) 

 Pheasants, 151 

 Phenacodus, 2, 120, 140 

 Phyllopods, 19 

 Pigeons, 151 

 Pigs. See Swine 

 Pike, 1 68 



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, 1 66 

 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, 113 

 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 



Pliocene, 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, Nummulites, 



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 



