BIOTIC

Mollusca
Gastropoda
Acteon tornatilis (A sea slug)	Aporrhais pespelecani (Pelicans foot)	Aporrhais serresianus (A gastropod)	Buccinum undatum (Common whelk)	Caecum armoricum (DeFolin's lagoon snail)
Capulus ungaricus (Fools capsnail)	Colus gracilis (A gastropod mollusc)	Crepidula fornicata (Slipper limpet)	Cylichna cylindracea (A gastropod mollusc)	Eulima bilineata (A gastropod mollusc)
Facelina bostoniensis (Boston facelina)	Helcion pellucidum (Blue-rayed limpet)	Hydrobia ulvae (Laver spire shell)	Lacuna vincta (Banded chink shell)	Littorina littorea (Common periwinkle)
Littorina saxatilis (Rough periwinkle)	Margarites helicinus (Pearly top shell)	Melanella alba (A gastropod mollusc)	Neptunea antiqua (Red whelk)	Nucella lapillus (Dog whelk)
Oenopota turricula (Turriculate lora)	Onchidoris bilamellata (Barnacle-eating onchidoris)	Onchidoris muricata (A sea slug)	Osilinus lineatus (Thick top shell)	Paludinella litorina (Lagoon snail)
Patella ulyssiponensis (China limpet)	Patella vulgata (Common limpet)	Philine aperta (Lobe shell)	Philine catena (Lobe shell)	Philine scabra (Lobe shell)
Pleurobranchus membranaceus (A sea slug)	Polinices spp. (A neckless shell)	Puncturella noachina (Diluvian puncturella)	Scaphander lignarius (Woody Canoe-bubble)	Scaphander spp. (A gastropod mollusc)
Tenellia adspersa (Lagoon sea slug)	Trichotropis borealis (Boreal hairysnail)	Tritonia hombergi (A sea slug)	Trophonopsis muricatus (A gastropod mollusc)	Truncatella subcylindrica (Looping snail)
Turbonilla (Pyrgiscus) crenata (A gastropod mollusc)	Turritella communis (An auger shell)	Velutina velutina (Velvet shell)	Vitreolina philippi (A gastropod mollusc)