http://www.conchology.uunethost.be/GENERAL/Cyberconchology/SuperConch/Gastropoda/BULLIDAE.html
http://www.ugr.es/~lstocino/bulla_striata.htm
http://www.medslugs.de/E/Med/Bulla_striata/Selection.htm
http://www.gastropods.com/5/Shell_15.html
http://www.nmr-pics.nl/Bullidae/album/index.html
http://hypselodoris.blogspot.pt/2012/06/bulla-striata-bruguiere-1792.html
http://www.medslugs.de/E/Atl-E/Bulla_striata/Selection.htm
http://opistobranquis.info/en/guia/cephalaspidea/bulla-striata/
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