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from organic remains may be pushed too far. When we 



arc dealing with species no longer living, we need an 



accumulation of evidence to warrant any deduction from 



.is to t lunate. Two species of the same genus may 



flourish under very different conditions of :is we 



may see from the (act that the EUpka* prin 



mammoth was a thick-furred northern form, though his 



modem representatives inl ;ral latitudes. 



s not by one species, but by the whole astern- 



-Rippfc aria b 



blage of the plants and animals, or what is called the 

 fossil flora and fauna, of a formation, that the climate in 



the organisms lived must be judged. The further 

 removed the fossils are from us in time, the more do they 

 differ from living forms, and the less reliable are they as 

 witnesses to climate. 



(^graphical Conditions. In most cases it is only 

 from the character of the included organic remains that 

 the conditions under which stratified deposits were laid 



can be determined. Hy the evidence of fossils we 



