You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Barrels" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bahamas" missing="" />
      <page ns="0" title="Bandram Brothers and Co" missing="" />
      <page ns="0" title="Barbadoes" missing="" />
      <page ns="0" title="Barclay Perkins &amp; Co." missing="" />
      <page ns="0" title="Barges" missing="" />
      <page ns="0" title="Barium nitrate" missing="" />
      <page pageid="93" ns="0" title="Bark for Tanning" />
      <page pageid="135" ns="0" title="Barilla" />
      <page pageid="232" ns="0" title="Bankside Gas Works" />
      <page pageid="150" ns="0" title="Barley" />
    </pages>
  </query>
</api>