Origin of Species By Means of Natural Selection: Or the Preservation of ...
Origin of Species By Means of Natural Selection: Or the Preservation of ...
Darwin, Charles, 1809-1882
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On this same principle we can understand how it is that specific characters are more variable than generic characters; and how the parts which are developed in an extraordinary degree or man- ner are more variable than other parts of the same spe- cies. Many analogous facts, all pointing in the same direction, could be added. Although very many species have almost certainly been produced by steps not greater than those separating fine varieties, yet it may be maintained that some have been deve...loped in a diflEerent and abrupt manner. Such an admission^ however, ought not to be made without strong evidence being assigned. The vague and in some respects false analogies, as they have been shown to be by Mr. Chauncey Wright, which have been advanced in favor of this view, such as the sudden crystallization of Digitized by VjOOQIC 8M THE ORIGIN OF SPECIES inorganic substances, or the falling of a facetted spheroid from one facet to another, hardly deserve consideration. One class of facts, however, namely, the sadden appear- ance of new and distinct forms of life in our geological formations, supports at first sight the belief in abrupt development.
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