36 ELEPHANTS. 



Stand J. species they belong* In some of the Stegodont elephants the 

 tusks attain an enormous size ; for instance, in a skull of 



Fig. 23. 



Skull and mandible of Elephas ganesa, showing the immense upper tusks 

 and the shortened chin. From Lower Pliocene, Siwalik Hills, India. 

 About Jg nat. size. 



Elephas (Stegodon) ganesa (fig. 23), exhibited in the gallery 

 (stand J), the tusks project for a distance of 9 ft. 9 in. beyond 

 the sockets. 



Pier- In the next stage we pass from the low-crowned Stegodont 

 case 34. 



Fig. 24. 



Grinding surface of an incomplete upper molar of Elephas planifrons. 

 From Lower Pliocene, Siwalik Hills, India. nat. size. 



group to animals in which the ridges are considerably higher 

 and the valleys completely filled with cement ; this is called 

 the Loxodont group. The most primitive member is Elephas 



