EXTINCT ANIMALS 



no grinding teeth with big surfaces, and all the 

 teeth have a single fang (Figs. 55 and 56). 



Fig. 54. — Photograph of the skiill of the Coypu Rat, to show 

 the greatly enlarged incisor teeth or " rodent " chisel-like 

 teeth in front, the absence of canines, and the flat grinding 

 molars behind. The large gap in the row of teeth between 

 the incisors and the molars is very characteristic. 



The fossil jaw shown in Fig. 57 came from 



Fig. 55. — Jaws of the Gharial, an Indian Crocodile, to show 

 the peg-like teeth. The bone is removed, showing that 

 the teeth have only a single fang each. 



Stonesfield in Oxfordshire. It is embedded in 



82 



