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Thus, none of the sedimentary layers adjacent to our shores notcan be considered even approximately complete fauna of the surroundinghis sea, and even less of modern faunas of other seas, lying in the samelatitude, and still less of the faunas of the seas, lying under very different latitudes.Organic remains entombed in the present, Daggertail shallows, notcan give us almost no clue about fish, shellfish and animalsmollusks, corals, entombed in the Bay of Bengal. To mention aa simple and obvious truth would be almost ridiculous if circumstancesinstead of forcing us to insist on it. Even stricter is the rule therewhere we are dealing with organisms living on land. When more numerousand sharp differences between animals and plants, peculiar to the distantfrom each other countries, our list these animals and plants is stillthe big gaps. The show has on the earth more than twenty Botanicalareas occupied by groups of forms, to the fact distinct from one another, whichif these forms were found in the fossil record, geologists would have found it difficulttake them to the same period. As for the fauna, the Arcticdifferent from moderate, moderate from tropical and southern moderate fromNorthern moderate. Moreover, even in the South temperate zone of the two areasSouth Africa and South America have a variety of mammals, birds,reptiles, fish, mollusks and insects. Shells and bones, lyingcurrently at the bottom of lakes and estuaries in these various fields,positively no idea that similarity, which is commonly expectfound in fossil remains of layers of the same antiquity. Moreclose to us periods excavated in any of these areas would bevery incomplete representatives of the contemporary flora and fauna of the globe.
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