WORLDWIDE NOW LIVING MOLLUSCA.
Screen 271:Helicoidea, Arcoidea

Trisidos semitorta (63 mm), colno 3323	Trisidos tortuosa (110 mm), colno 3348

Anadara consociata (75 mm), colno 3356	Anadara scapha (61 mm), colno 52838

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Ischnochitonina	Chitonina	Nautiloida	Coleoida	Argonautoidea	Dentaliida	Patelloidea	Fissurelloidea	Scissurelloidea	Pleurotomarioidea
Trochoidea	Cirroidea	Neritoidea	Stromboidea	Ampullarioidea	Cyclophoroidea	Cerithioidea	Littorinoidea	Xenophoroidea	Janthinoidea
Eulimoidea	Buccinoidea	Columbelloidea	Conoidea	Mitroidea	Turbinelloidea	Volutoidea	Muricoidea	Naticoidea	Cypraeoidea
Lamellarioidea	Calyptraeoidea	Tonnoidea	Ficoidea	Architectonicoidea	Pyramidelloidea	Acteonoidea	Bulloidea	Aplysioidea	Pleurobranchioidea
Ellobioidea	Siphonarioidea	Amphiboloidea	Chilinoidea	Lymnaeoidea	Planorbioidea	Enoidea	Bulimuloidea	Acavoidea	Strophocheiloidea
Cerionoidea	Achatinoidea	Rhytidoidea	Helixarionoidea	Vitrinoidea	Camenoidea	Helicoidea	Arcoidea	Limopsoidea	Mytiloidea
Pterioidea	Pinnoidea	Limoidea	Ostreoidea	Pectinoidea	Anomioidea	Trigonioidea	Unionoidea	Muteloidea	Lucinoidea
Carditoidea	Chamoidea	Crassatelloidea	Astartoidea	Cardioidea	Tridacnoidea	Mactroidea	Solenoidea	Tellinoidea	Donacoidea
Dreissenoidea	Arcticoidea	Glossoidea	Corbiculoidea	Veneroidea	Myoidea	Hiatelloidea	Phaladoidea	Pandoroidea	Clavagelloidea
Cuspidariina