FOSSILS. 65 



same way as the distribution of life is varied 

 upon the earth's surface now. And instead of 



[nations representing a 

 multitud ons, there appears 



it one creation. These types of life sur- 

 vived from the time by undergoing more 

 ition to alt< nditions, as a 

 necessary circumsl I heir perpetuation 

 through all the revolutions which the earth's sur- 

 has und 

 Thus it is known that the elephant, hippo- 

 imus, lion, hyaena, rhin< which arc now 

 living in Africa, ha immon animals in 

 and Britain since the time during which 

 : that those animals have 



Changed their habitation; and that the area of 

 the life province to which they belong is mani- 

 v altered. Th( no animals more dis- 



tinctive ' day than the 



hippopotamus and ostrich, but in a recent ter- 

 tiary period al time, these animals left 

 the: V .rthern India, in asso- 

 ciation with extinct alia- of the giraffe, a type 



which is now limited to Africa. And so another 

 change in 1 upied by a natural history 



province of life is made known by remains of 

 animals preserved in the rocks. 



All down tl of the geological ages 



the story is of the same kind. Wherever there 

 is a change in the material of which rocks are 

 formed there is a change in the distribution of 

 life on the earth. The upheaval or depression 

 which varies the distribution of the mineral mat- 

 ter and produces the succession of strata is also 

 the catise which varies the distribution of life. 

 Therefore the fossils found in any geological 



