Distribution, affected by climate, 5
affected by physical features, 5
contrasts of, in similar climates, 5
similarities of, in diverse climates, 6
barriers as affecting, 6
study of, dependent on a good classification, 83
of animals an adjunct to geology, 8
of animals requires certain preliminary studies, 8
of animals dependent on physical geography, 35
of animals, as affected by the glacial epoch, 40