482 



ZOOLOGY 



SECT. 



as regards their limbs, for swift terrestrial locomotion. They 

 have a relatively small head and neck, the fore-limbs small, and 

 each provided with five digits ; the hind-legs long and powerful ; 



FIG. 1122. "WombSit^Phascolomys mitchelli). (From the Cambridge Natural History.) 



rapid progression is effected by great springing leaps, with the 

 body inclined forwards and the fore-limbs clear of the ground. 

 The foot is narrow and provided with four toes, the hallux being 

 absent ; the two inner (second and third) small and united together 



FIG. 1123. Koala (Phascolarctos cinereus). (After Vogt and Specht.) 



by integument, while the middle toe is very long and powerful. 

 The tail is very long, and usually thick. There is a large marsupium. 

 The Tree-Kangaroos differ from the ordinary Kangaroos in their 



