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="Bacchidinium_polypes|8084" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2319" ns="0" title="Family Gonyaulacaceae Subfamily uncertain" />
      <page pageid="3808" ns="0" title="Bacchidinium" />
      <page pageid="3809" ns="0" title="Bacchidinium polypes" />
      <page pageid="3810" ns="0" title="Bacchidinium polypes subsp. clavulum" />
      <page pageid="3811" ns="0" title="Bacchidinium polypes subsp. polypes" />
      <page pageid="3812" ns="0" title="Bacchidinium sarmentum" />
      <page pageid="4842" ns="0" title="Cleistosphaeridium polypes" />
      <page pageid="7565" ns="0" title="Hystrichosphaeridium recurvatum subsp. polypes" />
      <page pageid="7871" ns="0" title="Impletosphaeridium polypes" />
      <page pageid="8076" ns="0" title="Kiokansium" />
    </pages>
  </query>
</api>