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="Belize|192" />
  </query-continue>
  <query>
    <pages>
      <page pageid="192" ns="0" title="Paises" />
      <page pageid="2295" ns="0" title="Como se llaman las partes del cuerpo en inglés" />
      <page pageid="2861" ns="6" title="Archivo:Wiki Ed b Lillo comp 12 9.JPG" />
      <page pageid="2977" ns="0" title="Penarc/Buchstabiertafel" />
      <page pageid="3042" ns="0" title="Los funerales de la Mamá Grande" />
      <page pageid="4900" ns="0" title="Penarc/Ethnobotanical resources in the Chilean Altiplano" />
    </pages>
  </query>
</api>