XIX.] 



MARSUPIALIA. 



325 



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 (Dendrolagus), 

 which habitually live among the boughs of large trees, have 



el — 



Fig. 122. -Rones of right pes of Kan- 

 garoo {M acropzis bennettii), \. 



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

 langer {Phalangista vulpina), f . 



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

 more laterally extended. 



In the leaf-eating, climbing Australian Opossums (Phalan- 

 gista,Y\g. 123) and Koalas (Phascolarctos) 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. 



