106 THE MAMMALIA. 



Phascolarctm fuscus of the present day (Fig. 5) 

 shows a skull of 19 cm., the skull of Notothe- 

 rium Mitchelli (Figs. 6 and 7) is 46 cm. long, to 

 40 cm. broad. The breadth is caused by the 

 enormous arch of the cheek-bone. The cheek-teeth 



FIG. 7. Skull of Nototherium, front view. One-sixth natural 

 size. After Owen. 



are very like those of Diprotodon, and are likewise 

 furnished with transverse ridges, the whole dental 



305 



formula being the same : i c - m -. The struc- 

 105 



ture and form of the teeth point to a plant-eater, 

 and not to the habits of a wombat that grubs for 

 roots. 



