 | 1877 - 786 lehte
...features of animal life in each. The east and west division represents — according to our views — a more fundamental diversity, since we find the northern...this division, taken by itself, would obscure the facts, firstly, of the close relation and parallelism of the Nearctic and Palaearctic regions, not... | |
 | Alfred Russel Wallace - 1876 - 704 lehte
...features of animal life in each. The east and west division, represents — according to our views — a more fundamental diversity ; since we find the northern continent itself so divided iii the earliest Eocene, and even in Cretaceous times ; while we have the strongest proof that South... | |
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... the north, with which they therefore have a true genetic relation; while any intercommunion between themselves has been comparatively recent and superficial, and has in no way modified the great features of animal life in each. The east and west division,... 