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>
    <allpages apcontinue="Folksy" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="56" ns="0" title="Biological Specimens (fossil and living)" />
      <p pageid="91" ns="0" title="Chips" />
      <p pageid="45" ns="0" title="Commercial repository" />
      <p pageid="85" ns="0" title="Core samples are stored in cold rooms while dredge and rock samples are stored in bags or boxes not in cold rooms" />
      <p pageid="90" ns="0" title="Cuttings" />
      <p pageid="94" ns="0" title="Dredges" />
      <p pageid="14" ns="0" title="ESIP" />
      <p pageid="10" ns="0" title="ESIP curation procedures" />
      <p pageid="60" ns="0" title="Experimentally-derived materials" />
      <p pageid="16" ns="0" title="First we go to market" />
    </allpages>
  </query>
</api>