384 MONOTREMATA. 



Porcupine. The tail is also composed of quills. The 

 general colour is brown ; it, however, varies in different 

 parts of Australia. In specimens from some localities 

 the under wool is abundant, and have consequently been 

 described as different species by some authorities. 



The head has a long bill but no teeth ; the animal 

 feeds solely on ants, which it obtains by means of its 

 long tongue. 



The Echidna is an inhabitant of Australia. Its skin 

 is of little value for any purpose. 



