The Living World Whence It Came And Whither It is Drifting a Review of the Spe
The Living World Whence It Came And Whither It is Drifting a Review of the Spe
H W Herbert William Conn
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the teachings of embryology as indicating the past history of animals, we may regard the general facts of the derivation of the Gastrasa from the unicellu- lar animals, and the subsequent modification of its descendants into the different sub-kingdoms which soon filled the world, as substantially proved. We come now to the ages represented by fossi- liferous rocks, and immediately the record is much more definite. When we strike the fossiliferous rocks we seem to be dealing with a more tangible... subject. The animals which were buried in the ancient muds and sediments, and which we are now unearthing, were actual animals and not hypotheti- cal ones. With all of the cogency of argument from the embryological standpoint, it cannot be denied that the steps in the history of animals which it points out are more or less hypothetical, and the stages in the history of life of which it speaks are stages of type only. But when we take a fossil in our hands, we cannot question that the fossil was once an actual animal, and an inhabitant of the world in the earlier ages.
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