Two-headed lizard (amphisbaena). Note: this image is not found in the cited book (under any name), and the book's illustration of the <i>Amphisbaena grevini</i><a rel="nofollow" class="external autonumber" href="https://books.google.com/books?id=KTQyZkrMfPIC&amp;pg=PA237-IA2">[1]</a> shows a different looking elongated reptile.
Ulisse Aldrovandi (1522-1605)
1640
(Disputed source, image not found:) <i><a rel="nofollow" class="external text" href="https://books.google.com/books?id=KTQyZkrMfPIC">Serpentum, et draconum historiae libri duo</a></i> (Libri I &amp; II; "Natural History of serpents and dragons", Books I and II)