XXV. MAMMALS {cnntinmd) 



Chord ATA {continued) 

 The Egg-la yixg Mammals {Monotremata) 



The order Monotremata includes those animals in which 

 the mammari/ (/lands are devoid of teats. Unlike all other 

 mammals (he mendjers 

 of this order deposit 

 cf/gs, the duckbill two 

 and the spinij ant-cater 

 usiudli/ one. Moreover, 

 a cloaca is present into 

 irliicli the ureters and 

 urinari/ bladder enter 

 ■separatelf/. 



Duckbill. — Lixiiig in 

 Australia and the ad- 

 jacent island of Tas- 

 mania is a curious and 

 i ntercst ing animal 

 known as the duckljill 

 (Fig. 20.5). It is eight- 

 een to twentj' inches 

 long, from the tip of its 

 bill to the tip of its flat 

 tail; and its bod)' is covered with thick, dark brown fur 

 except on the bill and feet. The feet have five toes fur- 

 nished with strong claws, and the toes are webbed. , The 



311 



Fi(j. 20.5. — Duckbill. 



