XIX.] 



MARSUPIALIA. 



[25 



is much compressed laterally, especially at its binder part, 

 so that the proximal ends of the second and third are 

 thrown behind that of the great fourth metatarsal, and en- 

 tirely concealed in a view of the dorsal surface of the foot. 

 The Tree-Kangaroos of New Guinea (Dendivlagus), 

 which habituall}^ live among the boughs of large trees, have 



C3 



cl-± 



Fig. 



122.- Bones of right pes of Kan- 

 garoo {Macropns betinettii), \. 



Fig. 123. — Bones of right foot of Pha- 

 langer {Phalangista vulpiiia), f. 



the feet constructed on the same type, but shorter, and 

 more laterally extended. 



In the leaf-eating, chmbing Australian Opossums {Phalan- 

 gista, Fig. 123) and Koalas {Phascolardos) the second and 

 third toes are also very slender, but the fourth and fifth are 

 more equal, especially in length, the foot is broad, and 

 there is a strongly developed prehensile and opposable, 

 though nailless, hallux. 



