- naevosa Philippi, 1844 = Haliotis rubra (family Haliotidae)

- nanum Lamarck, 1822 = Bembicium nanum (family Littorinidae – Lacuninae)

- nanus Dunker, 1856 = Musculus nanus (family Mytilidae)

- nautica Thornley, 1952 = Agnewia tritoniformis (family Muricidae – Rapaninae)

- navalis Linnaeus, 1758 = Teredo navalis (family Teredinidae – Teredininae)

- navicula Middlefart, 2002 = Cuna navicula (family Condylocardiidae – Cuninae)

- nebulosus Tenison Woods, 1876 = Limnoperna inconstans (family Mytilidae)

- neglecta Angas, 1867 = Phycothais reticulata (family Muricidae – Rapaninae)

- nenia Hedley, 1903 = Splendrillia nenia (family Drillidae)

- neozelandica Dell, 1959 = Abraliopsis gilchristi (family Enoploteuthidae)

- neozelanicus Iredale, 1915 = Limnoperna pulex (family Mytilidae)

- nepeanensis Gatliff, 1906 = Brookula nepeanensis (family Turbinidae – Skeneinae)

- nepeanensis Pritchard & Gatliff, 1904 = Cyclochlamys favus (family Propeamussiidae)

- nereis Iredale, 1940 = Siphonaria tasmanica (family Siphonariidae)

- neuroptera Jatta, 1896 = Ctenopteryx siculus (family Ctenopterygidae)

- newmanae Cotton, 1949 = Persicula pulchella (family Cystiscidae – Persiculinae)

- neztalia Turner & McKoy, 1979 = Bankia neztalia (family Teredinidae – Bankiinae)

- niceteria Hedley & May, 1908 = Carinastele niceteria (family Calliostomatidae – Thysanodontinae)

- nicholsoni Iredale, 1927 = Anadara trapezia (family Arcidae – Anadarinae)

- nielseni Laseron, 1948 = Cystiscus minutissimus (family Cystiscidae – Cystiscinae)

- nigellus Reeve, 1854 = Nassarius nigellus (family Nassariidae – Nassariinae)

- nigra Reeve, 1844 = Mitra badia (family Mitridae – Mitrinae)

- nigra Stimpson, 1855 = Dendrodoris nigra (family Dendrodorididae)

- nigricans Quoy & Gaimard, 1832 = Onchidella nigricans (family Onchidiidae)

- nigrita Sowerby, 1834 = Amblychilepas nigrita (family Fissurellidae – Fissurellinae)

- nigrofuscus A. Adams, 1851 = Monophorus nigrofuscus (family Triphoridae – Triphorinae)

- nigrofuscus Tate, 1891 = Dolicholatirus spiceri (family Fasciolariidae – Peristerniinae)

- nimbifer Iredale, 1924 = Lima nimbifer (family Limidae)

- nitens Frauenfeld, 1867 = Lucidestea nitens (family Rissoidae – Rissoinae)

- nitens Kiener, 1859 = Prothalotia lehmanni (family Trochidae – Trochinae)

- nitens Menke, 1848 = Limnoperna pulex (family Mytilidae)

- nitida Angas, 1867 = Turbonilla mariae (family Pyramidellidae – Turbonillinae)

- nitida Ponder & Yoo, 1976 = Pisinna nitida (family Anabathridae)

- nitida Reeve, 1854 = Paphies elongata (family Mesodesmatidae – Mesodesmatinae)

- nitidissimus Fenaux, 1942 = Conus anemone (family Conidae – Coninae)

- nitidulus Philippi, 1855 = Phasianotrochus irisodontes (family Trochidae – Trochinae)

- nitidus Kiener, 1850 = Phasianotrochus eximius (family Trochidae – Trochinae)

- nivea A. Adams, 1853 = Rissoina nivea (family Rissoidae – Rissoininae)

- nivea Hutton, 1878 = Trimusculus conicus (family Trimusculidae)

- nivea Verco, 1909 = Isotriphora nivea (family Triphoridae – Triphorinae)

- niveum Brazier, 1872 = Semicassis pyrum (family Tonnidae – Phaliinae)

- nivosus Burn, 1958 = Paradoris dubia (family Discodorididae)

- nobilis Philippi, 1849 = Astele rubiginosum (family Calliostomatidae – Calliostomatinae)

- noctiluca Lu, Roper & Tait, 1985 = Loliolus noctiluca (family Loliginidae)

- nodiferus Tryon, 1881 = Charonia lampas rubicunda (family Ranellidae – Cymatiinae)

- nodocostata Tate & May, 1901 = Sassia kampyla (family Ranellidae – Cymatiinae)

- nodorete May, 1915 = Paramontana rufozonata (family Conidae – Mangeliinae)

- nodostaminea Hedley, 1912 = Domiporta strangei (family Mitridae – Mitrinae)

- nodosus Solander, 1786 = Argonauta nodosus (family Argonautidae)

- nodulosa Angas, 1864 = Hoplodoris nodulosa (family Discodorididae)

- nodulosum Musgrave, 1929 = Bembicium auratum (family Littorinidae – Lacuninae)

- norfolkensis Sowerby, 1869 = Aplysia parvula (family Aplysiidae – Aplysiinae)

- notoaustralis Cotton, 1930 = Condylocardia notoaustralis (family Condylocardiidae – Condylocardiinae)

- notoides Berry, 1921 = Idiosepius notoides (family Idiosepiidae)

- novacambrica Laseron, 1953 = Cuna delta (family Condylocardiidae – Cuninae)

- novacambricum Hedley, 1915 = Neolepton planilirata (family Neoleptonidae)

- novaehollandiae Hoyle, 1909 = Sepia novaehollandiae (family Sepiidae)

- novaehollandiae Philippi, 1853 = Philippia lutea (family Architectonicidae – Architectonicinae)

- novaehollandiae Reeve, 1847 = Fusinus novaehollandiae (family Fasciolariidae – Fusininae)

- novaehollandiae Reeve, 1847 = Ischnochiton australis (family Ischnochitonidae – Ischnochitoninae)

- novaezelandiae Bergh, 1904 = Hoplodoris nodulosa (family Discodorididae)

- novarensis Frauenfeld, 1867 = Alvania novarensis (family Rissoidae – Rissoinae)

- nubeculata Reeve, 1859 = Mitrella leucostoma (family Columbellidae – Atiliinae)

- nucleocostata May, 1915 = Stephopoma nucleocostata (family Siliquariidae – Stephopomatinae)

- nucleus Lamarck, 1818 = Varicorbula gibba (family Corbulidae – Corbulinae)

- nux Reeve, 1858 = Mitrella austrina (family Columbellidae – Atiliinae)

- nux Reeve, 1859 = Mitrella tenuis (family Columbellidae – Atiliinae)

- nympha A. Adams & Angas, 1864 = Cupidoliva nympha (family Olivellidae)

- nympha Pfeffer, 1884 = Brachioteuthis riisei (family Brachioteuthidae)

- nymphalis Reeve, 1857 = Soletellina biradiata (family Psammobiidae)