Acmaea virginea (O. F. Müller, 1776) accepted as Tectura virginea (O. F. Müller, 1776) (additional source)
Arca raridentata S. V. Wood, 1840 † accepted as Bathyarca raridentata (S. V. Wood, 1840) † (additional source)
Cancellariidae Forbes & Hanley, 1851 (original description)
Ceratisolen Forbes, 1848 accepted as Pharus J. E. Gray, 1840 (original description)
Cerithiopsis Forbes & Hanley, 1850 (original description)
Chemnitzia jeffreysii Forbes & Hanley, 1850 accepted as Pyrgiscus jeffreysii (Jeffreys, 1848) (original description)
Cynthia morus Forbes, 1848 accepted as Pyura microcosmus (Savigny, 1816) (original description)
Cynthia tessellata Forbes, 1848 accepted as Pyura tessellata (Forbes, 1848) (original description)
Emarginula muelleri Forbes & Hanley, 1849 accepted as Emarginula fissura (Linnaeus, 1758) (original description)
Eolidia cristata (Delle Chiaje, 1841) accepted as Janolus cristatus (Delle Chiaje, 1841) accepted as Antiopella cristata (Delle Chiaje, 1841) (basis of record)
Erycina plebeia (Pulteney, 1799) accepted as Donacilla cornea (Poli, 1791) (source of synonymy)
Eulima distorta (Defrance, 1823) sensu R. A. Philippi, 1836 accepted as Vitreolina philippi (de Rayneval & Ponzi, 1854) (basis of record)
Eulima distorta var. gracilis Forbes & Hanley, 1853 accepted as Melanella monterosatoi (Monterosato, 1890) (original description)
Fiona Alder & Hancock, 1853 (original description)
Fusus cranchii T. Brown, 1827 accepted as Propebela rufa (Montagu, 1803) (source of synonymy)
Jeffreysia Alder, 1850 accepted as Rissoella J. E. Gray, 1847 (original description)
Jeffreysia globularis Forbes & Hanley, 1853 accepted as Rissoella globularis (Forbes & Hanley, 1853) (original description)
Kelliidae Forbes & Hanley, 1848 accepted as Lasaeidae J. E. Gray, 1842 (original description)
Leda pygmaea (Münster, 1837) sensu Forbes & Hanley, 1849 accepted as Yoldiella philippiana (Nyst, 1845) (basis of record)
Leptoclinum punctatum Forbes, 1848 accepted as Diplosoma listerianum (Milne Edwards, 1841) (original description)
Lima sulcata T. Brown, 1827 accepted as Limatula subauriculata (Montagu, 1808) (source of synonymy)
Litorina tenebrosa var. intermedia Forbes & Hanley, 1850 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina saxatilis var. intermedia Forbes & Hanley, 1850 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa var. intermedia Forbes & Hanley, 1850 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Lucinopsis Forbes & Hanley, 1848 accepted as Mysia Lamarck, 1818 (original description)
Lyonsia plicata [attributed to (Montagu, 1808)] in Forbes & Hanley, 1848 accepted as Saxicavella jeffreysi Winckworth, 1930 (basis of record)
Megathyris cistellula (Wood, 1841) accepted as Argyrotheca cistellula (Wood, 1841) (new combination reference)
Molgula Forbes, 1848 (original description)
Molgula oculata Forbes, 1848 (original description)
Molgula tubularis Forbes, 1848 accepted as Eugyra arenosa (Alder & Hancock, 1848) (original description)
Mya purpurea Montagu, 1808 accepted as Turtonia minuta (O. Fabricius, 1780) (source of synonymy)
Nucula radiata Hanley, 1849 accepted as Nucula hanleyi Winckworth, 1931 (original description)
Odostomia marionae MacGillivray, 1843 accepted as Onoba semicostata (Montagu, 1803) (source of synonymy)
Odostomia striolata Forbes & Hanley, 1850 (original description)
Oithona Alder & Hancock, 1851 accepted as Fiona Alder & Hancock, 1853 (original description)
Oithona nobilis Alder & Hancock, 1851 accepted as Fiona pinnata (Eschscholtz, 1831) (original description)
Patella spirata Helbling, 1779 accepted as Hipponix incurvus (Gmelin, 1791) (source of synonymy)
Perophora listeri Wiegman, 1835 (original description)
Pinna pectinata Linnaeus, 1767 sensu Pennant, 1812 accepted as Atrina fragilis (Pennant, 1777) (basis of record)
Pleurotoma ulideana [sic] accepted as Pleurotoma ulidiana W. Thompson, 1845 accepted as Propebela rufa (Montagu, 1803) (basis of record)
Pleurotoma ulidiana W. Thompson, 1845 accepted as Propebela rufa (Montagu, 1803) (source of synonymy)
Polititapes virgineus (Linnaeus, 1767) sensu auct. accepted as Polititapes rhomboides (Pennant, 1777) (additional source)
Propilidium Forbes & Hanley, 1849 (original description)
Rissoa calathus Forbes & Hanley, 1850 accepted as Alvania beanii (Hanley, 1844) (original description)
Rissoa gracilis MacGillivray, 1843 accepted as Onoba semicostata (Montagu, 1803) (source of synonymy)
Rissoa proxima Forbes & Hanley, 1850 accepted as Ceratia proxima (Forbes & Hanley, 1850) (original description)
Rissoa soluta R. A. Philippi, 1844, sensu Forbes & Hanley, 1850 accepted as Obtusella intersecta (S. V. Wood, 1857) (basis of record)
Rissoa ulvae (Pennant, 1777) accepted as Peringia ulvae (Pennant, 1777) (basis of record)
Runcina Forbes, 1851 (original description)
Runcina hancocki Forbes, 1851 accepted as Runcina coronata (Quatrefages, 1844) (original description)
Skenea divisa Forbes & Hanley, 1853 accepted as Skenea serpuloides (Montagu, 1808) (original description)
Skenea laevis (R. A. Philippi, 1844) sensu Forbes & Hanley, 1856 accepted as Dikoleps nitens (R. A. Philippi, 1844) (basis of record)
Skenea nitidissima (J. Adams, 1800), sensu Forbes & Hanley, 1850 accepted as Omalogyra atomus (R. A. Philippi, 1841) (basis of record)
Skenea rota Forbes & Hanley, 1850 accepted as Ammonicera rota (Forbes & Hanley, 1850) (original description)
Solen coarctatus Gmelin, 1791 sensu Brocchi, 1814 accepted as Azorinus chamasolen (da Costa, 1778) (basis of record)
Spirialis jeffreysii Forbes & Hanley, 1849 accepted as Limacina retroversa (J. Fleming, 1823) (original description)
Spirialis macandrewi Forbes & Hanley, 1849 accepted as Limacina retroversa (J. Fleming, 1823) (original description)
Strombus turboformis Montagu, 1808 accepted as Cerithidea costata (da Costa, 1778) accepted as Cerithideopsis costata (da Costa, 1778) (source of synonymy)
Styela informis Forbes, 1848 accepted as Polycarpa pomaria (Savigny, 1816) (original description)
Styela quadrangularis Forbes, 1848 accepted as Polycarpa pomaria (Savigny, 1816) (original description)
Teredo megotara Hanley, 1848 accepted as Psiloteredo megotara (Hanley, 1848) (original description)
Thecacera virescens Forbes & Hanley, 1851 accepted as Palio nothus (G. Johnston, 1838) (original description)
Trochus lyonsii Leach, 1850 accepted as Calliostoma zizyphinum (Linnaeus, 1758) (original description)
Turritella carinatula J. Fleming, 1828 accepted as Turbonilla lactea (Linnaeus, 1758) (source of synonymy)