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>
    <allimages gaicontinue="LostMine_pic6.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="97" ns="6" title="File:BlackSpider note1.jpg" />
      <page pageid="98" ns="6" title="File:BlackSpider note2.jpg" />
      <page pageid="99" ns="6" title="File:Cragmaw note.jpg" />
      <page pageid="100" ns="6" title="File:ListOfTheGods.jpg" />
      <page pageid="101" ns="6" title="File:LostMine pic1.jpg" />
      <page pageid="110" ns="6" title="File:LostMine pic10.jpg" />
      <page pageid="102" ns="6" title="File:LostMine pic2.jpg" />
      <page pageid="103" ns="6" title="File:LostMine pic3.jpg" />
      <page pageid="104" ns="6" title="File:LostMine pic4.jpg" />
      <page pageid="105" ns="6" title="File:LostMine pic5.jpg" />
    </pages>
  </query>
</api>