... other source than a creative purpose manifested in space? These same purposes, this same constancy in the employment of means toward a final end, may be read still more clearly in the study of the fossils of the different creations. The species of all the creations are materially and genealogically as distinct from each other as those of the different points on the surface of the globe. I have compared hundreds of species reputed identical in various successive deposits,—species which are always quoted in favor of a transition, however indirect, from ... — Louis Agassiz: His Life and Correspondence • Louis Agassiz