MAMMALIA. 



501 



{Feramelidce). It is, Fig. 345.— Pelvic Girdle of the 

 however, confined to Kangaroo x|. {Ad not.) 



these and not found in 

 the Eutheria. 



The tibia and fibula 

 are very long and the 

 femur is short but 

 powerful. The pelvis 

 shows well the large 

 epipubic bones, found 

 not only in Metatheria 

 but in Protothexia. 



The foot of the 

 kangaroo is modified 

 for rapid locomotion, 

 mainly by jumping, and 



the toes are corres- , _. 



pondingly reduced. In 



Fig. 346.— Hind-foot of Kangaroo some respects it is not 

 xi {Adnat.-) unlike that of the two- 



toed ostrich. The ves- 

 Caicaneum. B tigial sccond and third 



toes take no part in 

 I Astragalus. locomotion but may be 



useful for scratching the 

 fur. 



Order I. 

 Polyprotodontia. 



The Polyprotodontia 

 are so-called because 

 they have a large num- 

 ber of front or incisor 

 teeth. There are always 

 more than three pairs 

 of incisors in the upper 

 jaw, usually four or five; 

 hence the skull of a 

 polyprotodont can, apart 



Note the absence of the hallux, the large fourth r„_^ r^fK^r m^t^tl-i^^ripn 

 toe and the syndactylic second and third. I^Om Ottier metatherian 



Metatarsals. 



Syndactylic 

 Toes. 



