http://www.medslugs.de/E/Med/Haminoea_hydatis/Selection.htm
http://www.seaslugforum.net/showall/hamihyda
http://www.gastropods.com/9/Shell_5579.html
http://www.nmr-pics.nl/Haminoeidae_new2/album/index.html
http://opistobranquis.info/en/guia/cephalaspidea/haminoea-hydatis/
http://www.medslugs.de/E/Atl-E/Haminoea_hydatis/Selection.htm
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