PROSOBRANCHIA (operculate molluscs)

Order	ARCHAEOGASTROPODA (limpets and top shells)	11
Family	FISSURELLIDAE (keyhole limpets)	1	4
Family	PATELLIDAE (limpets)	4	41	5		1
Family	TRICOLIIDAE (pheasant shells)	1		29
Family	TROCHIDAE (topshells)	5	72			3
Order	MESOGASTROPODA (an order of prosobranch gastropods)	27
Family	ACICULIDAE (point snails)	1				3
Family	CALYPTRAEIDAE (slipper limpets)	2	15
Family	CERITHIIDAE (a family of marine snails)	1		1
Family	ERATOIDAE (cowries)	2	37
Family	HYDROBIIDAE (spire snails or mudsnails)	4	11	22		1
Family	LITTORINIDAE (periwinkles)	7	19	23	4	3
Family	NATICIDAE (a family of whelks)	2	31
Family	POMATIIDAE (land winkles)	1	4			4
Family	RISSOIDAE (a family of prosobranch molluscs)	3	4	100	4
Family	TRUNCATELLIDAE (looping snails)	1		29		1
Family	TURRITELLIDAE (turret shells)	1	6
Family	VALVATIDAE (valve snails)					1
Family	VIVIPARIDAE (river snails)	1		4		1
Order	NEOGASTROPODA (an order of predatory gastropods)	5
Family	BUCCINIDAE (a family of whelks)	1	30
Family	MURICIDAE (a family of whelks and oyster drills)	2	45			2
Family	NASSARIIDAE (a family of dog whelks)	2	11	2

Crothers, J.H., 2003 (rocky shore species)	Rocky Shore Snails as Material for Projects (with a Key for their Identification)
Graham, A., 1971	British Prosobranch and other operculate gastropod molluscs
Graham, A., 1988	Prosobranch and Pyramidellid Gastropods: Keys and Notes for the Identification of the Species
Pfleger, V., 1998 (Terrestrial and freshwater species)	A Field Guide in Colour to Molluscs
Terrestrial and freshwater
Pfegler, V. & Chatfield, J., 1988	A Guide to Snails of Britain and Europe

Subtaxa