roundel skate
... that the embryo of the roundel skate develops in a mermaid's purse?
... that the <a href="./Embryo" id="mwA9Q" rel="mw:WikiLink" title="Embryo">embryo</a> of the <b id="mwA9U"><a class="mw-redirect" href="./Raja_texana" id="mwA9Y" rel="mw:WikiLink" title="Raja texana">roundel skate</a></b> <i id="mwA9c">(pictured)</i> develops in a <a href="./Egg_case_(Chondrichthyes)" id="mwA9g" rel="mw:WikiLink" title="Egg case (Chondrichthyes)">mermaid's purse</a>?