THE EVIDENCE FOR ORGANIC EVOLUTION 



525 



as Darwin did in his famous volume, that if one species can come 

 from another the process can continue indefinitely, and, given time, 



Fig. 283. — Evolution in European and American cattle. 



A, an early figure representing the principal ancestral species, the urus or German 

 aurochs, abundant in Europe and Britain during Roman times, but now extinct, unless 

 some of the herds preserved in English parks are survivors. B, an early type of the Jersey 

 breed. C, modern Jersey. D, hornless breed of Egyptian cattle, not ancestral to modern 

 hornless breeds, but showing that there were special breeds, and hence a long antecedent 

 domestication of cattle even in ancient times. E, modern prize Hereford steer, showing 

 contrast with type C that is bred for milk production. (.4, after Cuvier, "Animal King- 

 dom," London, 1827; B, from the Country Gentleman, 1853; C and E, by courtesy College 

 of Agriculture, University of Missouri; £>, after Breasted from a tomb relief at Gizeh, 

 29th century, B.C.) 



any possible amount of evolutionary change can be produced. 

 Certainly one could hardly expect greater changes in a few thou- 



