<ol><li>(top center): <i>Toreuma bellagemma</i> <small>(Haeckel)</small> = <a href="//commons.wikimedia.org/w/index.php?title=Kolpohorae&amp;action=edit&amp;redlink=1" class="new" title="Kolpohorae (page does not exist)">Kolpohorae</a> sp.?, medusa from the side</li>
<li>(center): <i>Toreuma bellagemma</i> <small>(Haeckel)</small> = Kolpohorae sp.?, medusa from</li>
<li>(bottom right): <i>Toreuma bellagemma</i> <small>(Haeckel)</small> = Kolpohorae sp.?, medusa, mouth from below</li>
<li>(bottom left): <i>Toreuma bellagemma</i> <small>(Haeckel)</small> = Kolpohorae sp.?, medusa, gonads from above</li>
<li>(top right): <i>Toreuma thamnostoma</i> <small>(Haeckel)</small> = Kolpohorae sp.?, medusa, bell from (swimming position) above</li>
<li>(top left): <i>Cassiopeja cyclobalia</i> <small>(Leo Schultze)</small> = <i><a href="//commons.wikimedia.org/wiki/Cassiopea_andromeda" title="Cassiopea andromeda">Cassiopea andromeda</a></i> <small>(Forsskål, 1775)</small>, medusa, bell from (swimming position) above</li></ol>
<bdi><a href="https://en.wikipedia.org/wiki/en:Ernst_Haeckel" class="extiw" title="w:en:Ernst Haeckel"><span title="German biologist, naturalist, philosopher, physician, and artist (1834-1919)">Ernst Haeckel</span></a>
</bdi>
The original drawing for <i>Kunstformen der Natur</i> (1904), plate 28: Discomedusae (see <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_028_300.html">here</a>, <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_028_text_1_200.html">here</a> and <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_028_text_2_200.html">here</a>)