https://web.archive.org/web/20130531072354/http://rfbolland.com/okislugs/ventbizo.html
http://www.gastropods.com/6/Shell_60526.shtml
http://www.seaslugsofhawaii.com/species/Mnestia-villica-a.html
http://www.sea-slug.com/species/umiusi348.htm
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=47
http://www.medslugs.de/E/Pac-W/Mnestia_girardi/Selection.htm