WoRMS - World Register of... www.marinespecies.org

ANSP Malacology Collection... clade.ansp.org

Bulla (gastropod) -... www.wikiwand.com

Bulla (gastropod) -... www.wikiwand.com

800px-Bulla_striata_01.JPG en.wikipedia.org

WoRMS - World Register of... www.marinespecies.org

ANSP Malacology Collection... clade.ansp.org

Bulla (gastropod) -... en.wikipedia.org

WoRMS - World Register of... www.marinespecies.org

Bulla ((striata group))... conchology.be

640px-Bulla_striata_Bruguiè... pt.wikipedia.org

Live animals of Atlantic... www.researchgate.net

BULLIDAE - Gastropods by... conchology.be

WoRMS - World Register of... www.marinespecies.org

Molluscabase - Bulla... www.molluscabase.org

Bulla (gastropod) -... www.wikiwand.com

Molluscabase - Bulla... www.molluscabase.org

Bulla striata – OPK... opistobranquis.info