servedly reprinted. There is more " life" than "rock" about
them,
and most of the chapters are devoted to palaeontology, and very well handled the different subjects are. The history, evolution,
and relation of the members of some families of animals are a most fascinating study. The result of environment and habit, in evolving in course of time a similarity between animals of totally distinct species, will be sure to interest the ordinary reader, as also will the wonderful adaptation of the mimicking instinct in flies and butterflies. "Moles and their Like" is a study of dis- similar animals with similar habits. "The Oldest Mammals" is an interesting account of how a naturalist, by working on the lines of a few simple laws of identification, discovers mammals to have existed long before the period usually assigned to the earliest. It is well seen how useful odontology is in tracing pedigrees.
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