<p><i>Hymenaster echinulatus</i> <small>(Percy Sladen)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Hymenaster_echinulatus&amp;action=edit&amp;redlink=1" class="new" title="Hymenaster echinulatus (page does not exist)">Hymenaster echinulatus</a></i> <small>Sladen, 1882</small>, from above (top) and below (bottom)
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crop from <a class="external free" href="https://en.wikipedia.org/wiki/Image:Haeckel_Asteridea.jpg">http://en.wikipedia.org/wiki/Image:Haeckel_Asteridea.jpg</a>
User <a href="https://en.wikipedia.org/wiki/User:Jasu" class="extiw" title="en:User:Jasu">Jasu</a> on <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>
<i>Kunstformen der Natur</i> (1904), plate 40