Excerpt from Distribution and Origin of Life in America
This volume is the outcome of the second series of "Swiney Lectures" on Geology which I delivered at the Victoria and Albert Museum in London in 1908. The subject chosen for these lectures was the "Geological History of the American Fauna." Instead of publishing the lectures, like the previous ones on the "European Fauna," with little alteration, I decided to amplify and rewrite them completely. In doing so I was enabled to bring out more clearly certain points in the geological history of the American animals which seemed to me of general interest.
It is always difficult to choose a suitable title for a work of this kind. The one I have selected is brief yet comprehensive. At the same time, it may be urged that the origin and distribution of Man might reasonably be expected from the title, whereas it has been omitted in the text. This omission is mainly due to the fact that the literature dealing with the subject, exclusive of Man, is very extensive, while the origin and distribution of human races in America is treated in quite a distinct set of periodicals and books.
An important feature of my researches is the elucidation of some of the problems connected with the cause and nature of the "Ice Age" or "Glacial Epoch." There is a considerable amount of faunistic evidence that both the Atlantic and the Pacific oceans were closed simultaneously in the north, resulting in a higher temperature of these oceans and a greater snowfall in the countries surrounding them in the north.
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