Acione Gray, 1840 (original description)
Adaria Gray, 1840 (original description)
Agaria Gray, 1840 (original description)
Algoa Gray, 1840 (original description)
Anapa Gray, 1842 accepted as Lasaea Brown, 1827 (original description)
Anoplus Gray, 1840 (original description)
Anoura Gray, 1840 (original description)
Argina Gray, 1840 (original description)
Asterocoma Gray, 1840 (original description)
Atrina Gray, 1840 accepted as Atrina Gray, 1842 (original description)
Aturia Gray, 1840 accepted as Hydrophis Latreille, 1801 (original description)
Azar Gray, 1840 (original description)
Bacalia Gray, 1840 (original description)
Bankia Gray, 1840 accepted as Bankia Gray, 1842 (original description)
Barbatia Gray, 1840 † accepted as Barbatia Gray, 1842 (original description)
Batilla Gray, 1840 accepted as Batillus Schumacher, 1817 accepted as Turbo Linnaeus, 1758 (original description)
Bitia Gray, 1840 (original description)
Bolania Gray, 1840 (original description)
Boltalia Gray, 1840 (original description)
Brachychlamys Gray, 1840 (original description)
Bryopa Gray, 1840 accepted as Bryopa Gray, 1847 (original description)
Bucephala Gray, 1840 (original description)
Calleaster Gray, 1840 (original description)
Calrita Gray, 1840 (original description)
Camitia Gray, 1840 (original description)
Cannabina Gray, 1840 (original description)
Cantinea Gray, 1840 (original description)
Cardinalia Gray, 1840 accepted as Cardinalia Gray, 1842 accepted as Tectus Montfort, 1810 (original description)
Cavolinia Gray, 1840 accepted as Cavolinia Abildgaard, 1791 (original description)
Cepatia Gray, 1840 † accepted as Cepatia Gray, 1842 † (original description)
Cernina Gray, 1840 † accepted as Cernina Gray, 1842 † (original description)
Cinulia Gray, 1840 † (original description)
Circopora Gray, 1840 (original description)
Cladophora Gray, 1840 (original description)
Clavagella Gray, 1840 (original description)
Clementia Gray, 1840 accepted as Clementia Gray, 1842 (original description)
Clotho Gray, 1840 (original description)
Colobocentrus Gray, 1840 accepted as Colobocentrotus Brandt, 1835 (original description)
Crissia Gray, 1840 accepted as Crisia Lamouroux, 1812 (original description)
Ctenoconcha Gray, 1840, nom. nud. accepted as Malletia Desmoulins, 1832 (original description)
Culana Gray, 1840 (original description)
Cuminia Gray, 1840 (original description)
Cyclotrema Gray, 1840 accepted as Cyclostrema Marryat, 1819 (original description)
Cyclotus Gray, 1840 accepted as Cyclotus Guilding in Swainson, 1840 (original description)
Cyclurus Gray, 1840 (original description)
Cymodoce Gray, 1840 (original description)
Cynodonta Gray, 1840 (original description)
Cypricia Gray, 1840 (original description)
Cyprovula Gray, 1840 accepted as Cypraeovula Gray, 1824 (original description)
Cyrtolites Gray, 1840 (original description)
Dendroris Gray, 1840 accepted as Dendrodoris Ehrenberg, 1831 (original description)
Deriobranchus Gray, 1840 (original description)
Detracia Gray, 1840, nom. nud. accepted as Detracia Gray in Turton, 1840 (original description)
Dimorpha Gray, 1840 (original description)
Dorsina Gray, 1840 accepted as Dosinia Scopoli, 1777 (original description)
Dostia Gray, 1840 accepted as Dostia Gray, 1842 accepted as Neripteron Lesson, 1831 (original description)
Dota Gray, 1840 accepted as Doto Oken, 1815 (original description)
Eglisia Gray, 1840 † accepted as Eglisia Gray, 1842 (original description)
Encrinites Gray, 1840 (original description)
Epistomea Gray, 1840 accepted as Epistomia Fleming, 1828 (original description)
Euneces Gray, 1840 accepted as Eumeces Wiegmann, 1834 (original description)
Foegia Gray, 1840 accepted as Foegia Gray, 1842 (original description)
Fossar Gray, 1840 (original description)
Geloina Gray, 1840 † accepted as Geloina Gray, 1842 (original description)
Gena Gray, 1840 accepted as Gena Gray, 1842 accepted as Stomatella Lamarck, 1816 (original description)
Gibbium Gray, 1840 (original description)
Ginorga Gray, 1840 (original description)
Guetera Gray, 1840 (original description)
Helicophora Gray, 1840 (original description)
Helicoplegma Gray, 1840 (original description)
Herinea Gray, 1840 (original description)
Heterocentrus Gray, 1840 accepted as Heterocentrotus Brandt, 1835 (original description)
Heterodon Gray, 1840 (original description)
Hippoaster Gray, 1840 (original description)
Hipponoe Gray, 1840 accepted as Tripneustes L. Agassiz, 1841 (original description)
Hyboclypeus Gray, 1840 † accepted as Hyboclypus L. Agassiz, 1839 † (original description)
Jesonia Gray, 1840 accepted as Jesonia Gray, 1847 accepted as Cardita Bruguière, 1792 (original description)
Lampania Gray, 1840 (original description)
Laspalia Gray, 1840 (original description)
Lathirus Gray, 1840 accepted as Latirus Montfort, 1810 (original description)
Leiopathes Gray, 1840 (original description)
Lenticularia Gray, 1840 (original description)
Leonia Gray, 1840 accepted as Leonia Baird, 1850 (original description)
Lepeta Gray, 1840 accepted as Lepeta Gray, 1847 (original description)
Leuconia Gray, 1840 accepted as Auriculinella Tausch, 1886 (original description)
Liasis Gray, 1840 accepted as Liasis Gray, 1842 (original description)
Licarea Gray, 1840 (original description)
Lichas Gray, 1840 (original description)
Licina Gray, 1840 accepted as Licina Gray, 1847 (original description)
Limacula Gray, 1840 accepted as Limatula S. V. Wood, 1839 (original description)
Limnopsis Gray, 1840 accepted as Limopsis Sassi, 1827 (original description)
Liopa Gray, 1840 (original description)
Liopala Gray, 1840 accepted as Hydrophis Latreille, 1801 (original description)
Lirizoa Gray, 1840 (original description)
Litharea Gray, 1840 (original description)
Lobophora Gray, 1840 (original description)
Macrochisma Gray, 1840 accepted as Macroschisma Gray, 1835 (original description)
Mactresia Gray, 1840 accepted as Martesia G. B. Sowerby I, 1824 (original description)
Malaclemys Gray, 1840 accepted as Malaclemys Gray, 1844 (original description)
Malybe Gray, 1840 accepted as Melibe Rang, 1829 (original description)