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4.4
52 reviewsExtract from the book:
Although the present volume, as giving an account of the vertebrate animals, is a natural sequel to, and completion of, my former book, Life and her Children, which treated of invertebrates, yet it is a more independent work, both in plan and execution, than I had at first contemplated.This arises from the nature of the subject. The structure and habits of the lower forms of life are sufficiently simple to be treated almost without reference to geological history. When, however, I began to sketch out the lives and structure of the vertebrate animals, which are so closely interlinked one with another and yet so sharply separated into groups, I soon found that I must carry my readers into the past in order to give any intelligible account of the present.
