202 MAMMALS. 



Lastly, South Australia has twenty-eight species, of which only four or one-seventh (the smallest 

 proportion of any) are peculiar. It has thirteen in common with New South Wales, and the same 

 number common to Western Australia, and of these there are five common to all three. Only two 

 are common to the south-west corner. It has obviously little claim to be considered a zoological 

 province. It is the mere highway between the east and the west, as it was formerly the ditch 

 or barrier separating them. The coimtry between North and South-west Australia is chiefly 

 indebted for its mhabitants to the countries bordering it to the south and east. The number of 

 species as yet foimd in it is thirty-three. Of these ten, or about one-third or one-fourth, are 

 endemic. The rest have found their way froju the south-west or from New South Wales. 



