362 Transactions of the South African Philosoiohical Society. 



Palaeontology and Geology, have during recent years arrived at 

 certain more or less definite results as to the previous history of the 

 earth and the migrations of certain groups of animals, and that, 

 if our results harmonise with those gained by the sister sciences, 

 we may confidently rest assured that our main results must approxi- 

 mate the truth. Whether we have already arrived at such a close 

 agreement I must leave the reader to judge. 



i 



