Physical changes affecting distribution, 7
Physeter, European Pliocene, 112
Picariæ, arrangement of, 95
range of Palæarctic genera of, 247
range of Ethiopian genera of, 309
range of Oriental genera of, 381
range of Australian genera of, 482
Picus, European Miocene, 161
Pigeons, classification of, 96
remarkable development of, in the Australian region, 395