EXTINCT ANIMALS 



Indian elephant, owing to the narrower shape 

 of the ridges, would have twenty-seven of them 

 in view when fully " cut." Now there is no 

 doubt that the increase in the number of the 

 ridges and their narrow form is a late and special 



Fig. 77. — Lower jaw of an adult African Elephant, showing 

 molars with only eleven transverse ridges, or " lozenges." 



character of the elephants. Their cheek-teeth 

 would be more like those of pigs, tapirs and 

 bears, if they had fewer transverse ridges. 

 Accordingly, in correspondence with the view 

 that the mastodons are more primitive in their 



112 



