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Marine snails

Myosotella denticulata. Shell height 6.5mm. Aperture lacks an operculum. Images of live animal in water. High water mark and just above. Salting on sheltered Menai Strait (full salinity sea water). Under stones with terrestrial invertebrates.
Myosotella denticulata
Myosotella myosotis. Height 7.5mm. Aperture not closed by an operculum. MHW, salt marsh, brackish 22ppt, Severn Estuary, August 2011.
Myosotella myosotis
Philine punctata. Shell height 1.8mm, from 5mm long animal. Abraded in area where covering mantle eroded in life. In debris and encrusting organisms scraped from sides of large (approx.1m cube) rock standing on silty sand. LWS Menai Strait. August 2010
Philine punctata
Emarginula fissura
Emarginula fissura
Diodora graeca
Diodora graeca
Tricolia pullus
Tricolia pullus
Margarites helicinus
Margarites helicinus
Gibbula tumida
Gibbula tumida
Gibbula cineraria
Gibbula cineraria
Gibbula umbilicalis
Gibbula umbilicalis
Jujubinus miliaris
Jujubinus miliaris
Jujubinus montagui
Jujubinus montagui
Osilinus lineatus
Osilinus lineatus
Calliostoma zizyphinum
Calliostoma zizyphinum
Calliostoma granulatum
Calliostoma granulatum
Tectura testudinalis
Tectura testudinalis
Tectura virginea
Tectura virginea
Dorsal (left) and ventral view of shell
Patella depressa
Dorsal (left) and ventral view of shell
Patella ulyssiponensis
Dorsal (left) and ventral view of shell
Patella vulgata
Helcion pellucidum
Helcion pellucidum
Turritella communis
Turritella communis
Cerithiopsis tubercularis. Glossy maroon shell. 3 spiral rows of tubercles on each whorl, except 4 smooth apical whorls of protoconch. Aperture has siphonal notch. On fine red seaweed growing on stone among muddy sand. Menai Strait, Wales, Aug. 2010.
Cerithiopsis tubercularis
Lacuna crassior
Lacuna crassior
Lacuna pallidula
Lacuna pallidula
Lacuna vincta. Long cephalic tentacles. Two smaller metapodial tentacles on rear of foot. Menai Strait, Wales. Febuary 2011.
Lacuna vincta
Littorina littorea
Littorina littorea
Littorina nigrolineata
Littorina nigrolineata
Littorina obtusata
Littorina obtusata
Littorina saxatilis
Littorina saxatilis
Juvenile Rissoa parva. Shell height 2.6mm. c: costa (yet to develop on much of body whorl). s: bifid snout. l: brown spiral line connecting transverse brown streaks (spiral line absent on some shells). LWS, Menai Strait, Wales. September 2011.
Rissoa parva
H. ulvae. Arrows indicate sutures.Left: 6.5mm high, shallow sutures & flattened whorls, salting pool, upper Dee Estuary, Flints., 29 p.p.t. (variable). Right: 6mm high, deep sutures & rounded whorls, wet sand at mouth of Dee Estuary, Cheshire, 33 p.p.t.
Hydrobia ulvae
Potamopyrgus antipodarum. Shell heights 4.5mm to 1.1mm. Umbilical chink on smallest, closed on others. Arrow indicates rounded adapical angle of aperture standing out from final whorl. Thickened aperture lips on top three mature specimens.
Potamopyrgus antipodarum
Live juveniles of Caecum armoricum collected from the Fleet, Dorset in October 2011 by Lin Baldock.
Caecum armoricum
Aporrhais pespelecani
Aporrhais pespelecani
Calyptraea chinensis
Calyptraea chinensis
Crepidula fornicata
Crepidula fornicata
Capulus ungaricus
Capulus ungaricus
Trichotropis borealis
Trichotropis borealis
Simnia patula
Simnia patula
Trivia arctica
Trivia arctica
Trivia monacha
Trivia monacha
Erato voluta
Erato voluta
Lamellaria latens. Spire barely perceptible, does not protrude beyond outer lip of aperture when shell viewed in plan. Longest shell dimension 3.2mm, from an animal 7mm long when live. LWS, Menai Strait, Wales. Aug. 2010.
Lamellaria latens
Shell of Lamellaria perspicua 10mm longest dimension, 7mm wide from live animal 20 mm long. Short spire projects beyond lip of aperture when seen from above or below. Though encased in the body, spire of this specimen was damaged and repaired in life.
Lamellaria perspicua
Velutina velutina
Velutina velutina
Polinices montagui
Polinices montagui
Polinices pulchellus
Polinices pulchellus
Euspira catena
Euspira catena
Epitonium clathrus
Epitonium clathrus
Epitonium trevelyanum
Epitonium trevelyanum
Epitonium turtonis
Epitonium turtonis
Melanella alba
Melanella alba
Trophon barvicensis
Trophon barvicensis
Trophon muricatus
Trophon muricatus
Trophon truncatus
Trophon truncatus
Ocenebra erinacea
Ocenebra erinacea
Nucella lapillus
Nucella lapillus
Buccinum humphreysianum
Buccinum humphreysianum
Buccinum undatum
Buccinum undatum
Colus gracilis
Colus gracilis
Colus jeffreysianus
Colus jeffreysianus
Neptunea antiqua
Neptunea antiqua
Volutopsius norvegicus
Volutopsius norwegicus
Hinia reticulata
Hinia reticulata
Hinia incrassata
Hinia incrassata
Hinia pygmaea
Hinia pygmaea
Haedropleura septangularis
Haedropleura septangularis
Mangelia nebula
Mangelia nebula
Teretia anceps
Teretia anceps
Acteon tornatilis
Acteon tornatilis