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 aicontinue="Batioladinium_gochtii.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Barssidinium.jpg" timestamp="2015-09-01T05:29:54Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/3/3c/Barssidinium.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Barssidinium.jpg" ns="6" title="File:Barssidinium.jpg" />
      <img name="Barssidinium_evangelineae.jpg" timestamp="2015-09-01T05:28:40Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/e/ea/Barssidinium_evangelineae.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Barssidinium_evangelineae.jpg" ns="6" title="File:Barssidinium evangelineae.jpg" />
      <img name="Barssidinium_wrennii.jpg" timestamp="2015-09-01T05:29:48Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/0/02/Barssidinium_wrennii.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Barssidinium_wrennii.jpg" ns="6" title="File:Barssidinium wrennii.jpg" />
      <img name="Batiacasphaera_compta.jpg" timestamp="2015-09-01T05:29:19Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/6/60/Batiacasphaera_compta.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batiacasphaera_compta.jpg" ns="6" title="File:Batiacasphaera compta.jpg" />
      <img name="Batiacasphaera_hirsuta.jpg" timestamp="2015-09-01T05:28:42Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/f/ff/Batiacasphaera_hirsuta.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batiacasphaera_hirsuta.jpg" ns="6" title="File:Batiacasphaera hirsuta.jpg" />
      <img name="Batiacasphaera_micropapillata.jpg" timestamp="2015-09-01T05:29:42Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/8/8e/Batiacasphaera_micropapillata.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batiacasphaera_micropapillata.jpg" ns="6" title="File:Batiacasphaera micropapillata.jpg" />
      <img name="Batiacasphaera_sphaerica_A.jpg" timestamp="2015-09-01T05:28:40Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/e/e4/Batiacasphaera_sphaerica_A.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batiacasphaera_sphaerica_A.jpg" ns="6" title="File:Batiacasphaera sphaerica A.jpg" />
      <img name="Batiacasphaera_sphaerica_B.jpg" timestamp="2015-09-01T05:29:10Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/5/5b/Batiacasphaera_sphaerica_B.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batiacasphaera_sphaerica_B.jpg" ns="6" title="File:Batiacasphaera sphaerica B.jpg" />
      <img name="Batioladinium1.jpg" timestamp="2015-09-01T05:29:42Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/8/87/Batioladinium1.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batioladinium1.jpg" ns="6" title="File:Batioladinium1.jpg" />
      <img name="Batioladinium2.jpg" timestamp="2015-09-01T05:28:50Z" url="http://dinoflaj.smu.ca/dinoflaj2/images/7/71/Batioladinium2.jpg" descriptionurl="http://dinoflaj.smu.ca/wiki/File:Batioladinium2.jpg" ns="6" title="File:Batioladinium2.jpg" />
    </allimages>
  </query>
</api>