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Excerpt from Annual Report of the Board of Regents of the Smithsonian Institution: Showing the Operations, Expenditures, and Condition of the Institution to July, 1894
To trace out the migration of the varied forms of life, both animal and vegetable, to their present habitats forms one of the most absorb ing of zoo geographical investigations - a study, as Mr. Wallace well remarks, which will surely lead to a fuller comprehension of the complex relations and mutual interdependence which link every animal and vegetable form with the ever-changing earth which sup ports them into one grand organic whole, and which, besides, will enable the investigator to demark with increasing certainty, as his labors progress, the changes in ¿uctuation of land and water which the globe has from age to age restlessly experienced. As soon as our knowledge of the fauna and ¿ora of the continents and islands of the globe had advanced sufficiently far to enable fairly accurate system atic catalogues of the animals and plants inhabiting them to be drawn up, many singular anomalies came to light, some of which have been apparently sufficiently explained, while of others the causes are still as inexplicable as ever.
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