Cardium aculeatum var. depressa J. T. Marshall, 1893 accepted as Acanthocardia aculeata (Linnaeus, 1758) (original description)
Cardium tuberculatum var. suborbicula J. T. Marshall, 1893 accepted as Acanthocardia tuberculata (Linnaeus, 1758) (original description)
Cerithiopsis metaxae var. alba J. T. Marshall, 1893 accepted as Metaxia metaxa (Delle Chiaje, 1828) (original description)
Cypraea europaea var. minor J. T. Marshall, 1893 accepted as Trivia arctica (Pulteney, 1799) (original description)
Donax vittatus var. albida J. T. Marshall, 1893 accepted as Donax vittatus (da Costa, 1778) (original description)
Donax vittatus var. cuneata J. T. Marshall, 1893 accepted as Donax vittatus (da Costa, 1778) (original description)
Lacuna pallidula var. naticiformis J. T. Marshall, 1893 accepted as Lacuna pallidula (da Costa, 1778) (original description)
Lacuna puteolus var. plicata J. T. Marshall, 1893 accepted as Lacuna parva (da Costa, 1778) (original description)
Montacuta bidentata var. triangularis J. T. Marshall, 1893 accepted as Kurtiella bidentata (Montagu, 1803) (original description)
Montacuta donacina S. V. Wood, 1851 sensu Jeffreys, 1864 † accepted as Devonia perrieri (Malard, 1904) (basis of record)
Mytilus barbatus var. depressa J. T. Marshall, 1893 accepted as Modiolus barbatus (Linnaeus, 1758) (original description)
Mytilus modiolus var. cylindrica J. T. Marshall, 1893 accepted as Modiolus modiolus (Linnaeus, 1758) (original description)
Mytilus modiolus var. gigas J. T. Marshall, 1893 accepted as Modiolus modiolus (Linnaeus, 1758) (original description)
Nucula nitida var. radiata J. T. Marshall, 1893 accepted as Nucula nitidosa Winckworth, 1930 (original description)
Odostomia acuta var. attenuata J. T. Marshall, 1893 accepted as Odostomia acuta Jeffreys, 1848 (original description)
Odostomia acuta var. gracilis J. T. Marshall, 1893 accepted as Odostomia acuta Jeffreys, 1848 (original description)
Odostomia diaphana var. inflata J. T. Marshall, 1893 accepted as Ondina diaphana (Jeffreys, 1848) (original description)
Odostomia insculpta var. laevissima J. T. Marshall, 1893 accepted as Ondina divisa (J. Adams, 1797) (original description)
Odostomia plicata var. carinata J. T. Marshall, 1893 accepted as Odostomia plicata (Montagu, 1803) (original description)
Odostomia pusilla (R. A. Philippi, 1844) accepted as Turbonilla pusilla (R. A. Philippi, 1844) (basis of record)
Odostomia pusilla var. cylindrata J. T. Marshall, 1893 accepted as Turbonilla pusilla (R. A. Philippi, 1844) (original description)
Odostomia pusilla var. grossa J. T. Marshall, 1893 accepted as Turbonilla sinuosa (Jeffreys, 1884) (original description)
Odostomia turrita var. nana J. T. Marshall, 1893 accepted as Odostomia turrita Hanley, 1844 (original description)
Pleurotoma rufa ecostata J. Marshall, 1893 (original description)
Psammobia tellinella var. lactea J. T. Marshall, 1893 accepted as Gari tellinella (Lamarck, 1818) (original description)
Psammobia tellinella var. purpurea J. T. Marshall, 1893 accepted as Gari tellinella (Lamarck, 1818) (original description)
Scrobicularia alba (W. Wood, 1802) accepted as Abra alba (W. Wood, 1802) (basis of record)
Scrobicularia alba var. oblonga J. T. Marshall, 1893 accepted as Abra alba (W. Wood, 1802) (original description)

 Homonymy

 for Montacuta bidentata var. triangularis J. T. Marshall, 1893

This name, which apparently has never been used after its original description, could preoccupy Montacuta ... [details]