Illustrations in Bartholin's <i>Historiarum anatomicarum</i> <b>II</b> (1654) for the siren (mermaid) specimen from Brazil dissected in Leiden (left, bottom). Bartholin obtained the skeletal hand and rib parts of it (figures right)
Thomas Bartholin
<cite class="book" style="font-style:normal" id="Reference-Bartholin-1654">Bartholin, Thomas (1654) "Historia XI. Sirenis se Marini Hominis Anatome" in  (in Latin)  <i> <a rel="nofollow" class="external text" href="https://books.google.com/books?id=2dxyQqZGEh4C&amp;pg=PA186">Thomae Bartholini historiarum anatomicarum rariorum centuria (I et )II</a></i>, <a href="https://en.wikipedia.org/wiki/en:Copenhagen" class="extiw" title="w:en:Copenhagen"><span title="capital city of Denmark">Copenhagen</span></a>:  typis academicis Martzani, sumptibus Petri Hauboldt bibl., p. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=2dxyQqZGEh4C&amp;pg=PA188-IA1">188a</a>  <small></small></cite>