Evolution of x\nimals 



485 



the ungulate-like kangaroos, the carnivorous Dasyurus, the 

 rodent-like wombat and opossum, the insectivore-like mar- 

 supial mole (Notorydes), the lemuroid tree kangaroos (Den- 

 drolagus). 



The subjoined is a tabulated comparison between urodele 

 Batrachia and Mammalia in which the frequent contact points 

 with the marsupials in particular will appear. But it should 

 be said that in arranging the table it has seemed entirely per- 

 missible to quote morphological details of similarity even in 

 one or two genera, though otherwise they may be of minor 

 value. Thus, if it can be sIiotvti that one or more species of 

 reptile has a lower jaw that articulates with the squamosal 

 rather than the quadrate, such would prove that the at least 

 potential capacity for such morphological change existed 

 amongst the reptiles, and thereby made a possible alliance 

 with the mammals. 



