 ... comparatively few peculiar types simply because a water separation happens to exist in the present geologic period ; nor is it evident why one of the resulting feeble divisions should be granted higher rank than a region of much less geographic extent...  The Auk - Page 3821892Full view - About this book
 | Clinton Hart Merriam - 1892 - 76 pages
...the present geologic period ; nor is it evident why one of the resulting feeble divisions should be granted higher rank than a region of much less geographic...and higher groups from the poles toward the tropics. Mammals have been chiefly used as illustrations because they answer the purpose better than any other... | |
 | 1892 - 790 pages
...the present geologic period; nor is it evident why one of the resulting feeble divisions should be granted higher rank than a region of much less geographic...and higher groups from the poles toward the tropics. Mammals have been chiefly used as illustrations because they answer the purpose better than any other... | |
 | Smithsonian Institution. Board of Regents - 1893 - 816 pages
...the present geologic period ; nor is it evident why one of the resulting feeble divisions should be granted higher rank than a region of much less geographic...and higher groups from the poles toward the tropics. Mammals have been chiefly used as illustrations because they answer the purpose better than any other... | |
 | Smithsonian Institution. Board of Regents - 1893 - 778 pages
...much less geographic extent comprising several times as many peculiar types. Hence the divisions hero recognized, and the rank assigned them, are based...and higher groups from the poles toward the tropics. Mammals have been chiefly used as illustrations because they answer the purpose better than any other... | |
 | Smithsonian Institution. Board of Regents - 1893 - 784 pages
...the present geologic period; nor is it evident why one of the resulting feeble divisions should be granted higher rank than a region of much less geographic...and higher groups from the poles toward the tropics. Mammals have beeu chiefly used as illustrations because they answer the purpose better than any other... | |
 | Biological Society of Washington - 1893 - 212 pages
...the present geologic period ; nor is it evident why one of the resulting feeble divisions should be granted higher rank than a region of much less geographic...and higher groups from the poles toward the tropics. Mammals have been chiefly used as illustrations because they answer the purpose better than any other... | |
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