Amberleya aureliana Cossmann, 1900 † (original description)
Benoistia Cossmann, 1900 † (original description)
Cerithium dorvali Cossmann, 1900 † accepted as Cosmocerithium dorvali (Cossmann, 1900) † (original description)
Chilodontoidea Hudleston, 1896 † (additional source)
Chilodontoidea trochoides Cossmann, 1900 † (original description)
Columbellaria bathonica Cossmann, 1900 † (original description)
Delphinula benoisti Cossmann, 1900 † (original description)
Neritopsis benoisti Cossmann, 1900 † (original description)
Ochetochilus Cossmann, 1900 † (original description)
Ochetochilus subvaricosus Cossmann, 1900 † (original description)
Patella aureliana Cossmann, 1900 † (original description)
Patella raduloides Cossmann, 1900 † (original description)
Phasianella grossouvrei Cossmann, 1900 † accepted as Oonia grossouvrei (Cossmann, 1900) † (original description)
Pileolus aequicostatus Cossmann, 1900 † (original description)
Purpuroidea multifilosa Cossmann, 1900 † (original description)
Valvata (Cincinna) benoisti Cossmann, 1899 † represented as Valvata benoisti Cossmann, 1899 † (additional source)
Viviparus aurelianus Cossmann, 1899 † accepted as Bathonella scotica (Tate, 1873) † (additional source)