Arca plicata Dillwyn, 1817 accepted as Acar plicata (Dillwyn, 1817) (original description)
Buccinum lima Dillwyn, 1817 accepted as Tritia lima (Dillwyn, 1817) (original description)
Bulla amygdalus Dillwyn, 1817 accepted as Bulla striata Bruguière, 1792 (original description)
Bulla lepida Dillwyn, 1817 accepted as Pseudosimnia carnea (Poiret, 1789) (original description)
Bulla nucleus Dillwyn, 1817 accepted as Pseudosimnia carnea (Poiret, 1789) (original description)
Bulla pectinata Dillwyn, 1817 accepted as Philine scabra (O. F. Müller, 1784) accepted as Hermania scabra (O. F. Müller, 1784) (original description)
Mytilus ambiguus Dillwyn, 1817 accepted as Rocellaria dubia (Pennant, 1777) (original description)
Mytilus aristatus Dillwyn, 1817 accepted as Leiosolenus aristatus (Dillwyn, 1817) (original description)
Ostrea proteus Dillwyn, 1817 accepted as Flexopecten glaber (Linnaeus, 1758) (original description)
Tellina zonata Gmelin, 1791, sensu Dillwyn, 1817 accepted as Macoma balthica (Linnaeus, 1758) (basis of record)
Trochus patholatus Dillwyn, 1817 accepted as Gibbula tumida (Montagu, 1803) accepted as Steromphala tumida (Montagu, 1803) (original description)
Turbo armatus Dillwyn, 1817 accepted as Bolma rugosa (Linnaeus, 1767) (original description)
Venus montagui Dillwyn, 1817 accepted as Astarte montagui (Dillwyn, 1817) accepted as Tridonta montagui (Dillwyn, 1817) (original description)
Voluta pellucida Dillwyn, 1817 accepted as Spiralinella spiralis (Montagu, 1803) accepted as Spiralina spiralis (Montagu, 1803) (original description)