http://shell.kwansei.ac.jp/~shell/pic_book/data07/bvernico.html
http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi129.html
http://www.gastropods.com/4/Shell_5244.html
http://www.nudibranch.com.au/pages/5658d.htm
http://www.seaslugsofhawaii.com/species/Bulla-vernicosa-a.html
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=520
http://tahitinudi.jimdo.com/liste-des-espèces/bulla-vernicosa/
http://www.nmr-pics.nl/Bullidae/album/index.html
http://www.medslugs.de/E/Ind-SW/Bulla_vernicosa/Selection.htm
http://www.medslugs.de/E/Ind-EW/Bulla_vernicosa/Selection.htm