Atys cylindricus (Helbling, 1779) [Bulla]

http://www.seaslugforum.net/showall/atyscyli
http://shell.kwansei.ac.jp/~shell/pic_book/data08/r000740.html
http://www.medslugs.de/E/Pac-W/Aliculastrum_cylindricum/Selection.htm
http://www.Philippine-Sea-Slugs.com/Cephalaspidea/Aliculastrum_cylindricum.htm
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=709
http://tahitinudi.jimdo.com/liste-des-espèces/atys-cylindricus/
http://www.nmr-pics.nl/Haminoeidae_new2/album/index.html
http://www.medslugs.de/E/Ind-E/Aliculastrum_cylindricum/Selection.htm