152 THE EVOLUTION OF MAN 



born in a very imperfect condition, are carried by the 

 mother for a long time ; until, in fact, they are completely 

 developed (Fig. 197). In the large Giant Kangaroo, which 



FIG. 1U7. The Crab-eating Pouched Rat (Philander cancrivorus). A 

 female with two young in its pouch. (After Brehm.) 



