- haliclona Burn, 1957 = Noumea haliclona (family Chromodorididae)
- halli Pritchard & Gatliff, 1899 = Cystiscus halli (family Cystiscidae – Cystiscinae)
- halligani Hedley, 1905 = Paraseila halligani (family Cerithiopsidae – Seilinae)
- hamata Hedley & May, 1908 = Hamacuna hamata (family Carditidae)
- hamiltoni Robson, 1925 = Mesonychoteuthis hamiltoni (family Cranchiidae)
- hanleyi Angas, 1867 = Bedeva paivae (family Muricidae – Ergalataxinae)
- hanleyi Angas, 1873 = Nuculana dohrni (family Nuculanidae – Nuculaninae)
- hanleyi Schwartz, 1860 = Rissoina fasciata (family Rissoidae – Rissoininae)
- harpula Kiener, 1840 (non Brocchi, 1814) = Crassispira harpularia (family Turridae – Crassispirinae)
- harpularia Desmoulins, 1842 = Crassispira harpularia (family Turridae – Crassispirinae)
- harriettae Petterd, 1884 = Circulus harriettae (family Tornidae – Circulinae)
- harrisoni Beddome, 1882 = Puncturella harrisoni (family Fissurellidae – Emarginulinae)
- harrisoni Beddome, 1883 = Marinula parva (family Ellobiidae – Pedipedinae)
- harrisoni Tate & May, 1900 = Puposyrnola harrisoni (family Pyramidellidae – Pyramidellinae)
- harrisoni Tenison Woods, 1877 = Parviterebra brazieri (family Columbellidae – Atiliinae)
- hartleyi Burn, 1958 = Jorunna hartleyi (family Discodorididae)
- hartleyi Burn, 1962 = Facelina hartleyi (family Facelinidae – Facelininae)
- haswelli Laseron, 1958 = Serrata haswelli (family Marginellidae – Marginellinae)
- hawaiiensis Dall, Bartsch & Rehder, 1938 = Gastrochaena cuneiformis (family Gastrochaenidae)
- hayashii Habe, 1976 = Philine hayashii (family Philinidae)
- hedgpethi Marcus, 1964 = Polycera hedgpethi (family Polyceridae – Polycerinae)
- hedleyi Berry, 1918 = Sepia hedleyi (family Sepiidae)
- hedleyi Dautzenberg, 1901 = Mesopeplum fenestratum (family Pectinidae – Chlamydinae)
- hedleyi E. A. Smith, 1915 = Sigapatella hedleyi (family Calyptraeidae)
- hedleyi May, 1911 = Serrata hedleyi (family Marginellidae – Marginellinae)
- hedleyi Prichard & Gatliff, 1899 = Munditia hedleyi (family Liotiidae – Liotiinae)
- hedleyi Pritchard & Gatliff, 1902 = Calliostoma hedleyi (family Calliostomatidae – Calliostomatinae)
- hedleyi Pritchard & Gatliff, 1904 = Pronucula pusilla (family Nuculidae)
- hedleyi Thiele, 1915 = Emarginula candida (family Fissurellidae – Emarginulinae)
- helicina Phipps, 1744 = Limacina helicina (family Limacinidae)
- helicochorda Miller, 1988 = Burnaia helicochorda (family Aeolidiidae)
- helicornum Iredale, 1936 = Epitonium tenellum (family Epitoniidae)
- helmsi Heldey, 1915 = Arthritica helmsi (family Galeommatidae)
- hemileuron Verco, 1911 = Dentalium hemileuron (family Dentaliidae)
- hendersoni Dall, Bartsch & Rehder, 1938 = Chama fibula (family Chamidae)
- hendrecki = Melanochlamys hendrecki (family Aglajidae)
- henniana Brazier, 1894 = Puncturella harrisoni (family Fissurellidae – Emarginulinae)
- henri Burn, 1969 = Melanochlamys queritor (family Aglajidae)
- hepatica Verco, 1906 = Scutellastra peronii (family Patellidae)
- hesitata Iredale, 1916 = Umbilia hesitata (family Cypraeidae – Gisortiinae)
- hexactes Péron in Lamarck, 1819 = Notochlamys hexactes (family Pectinidae – Chlamydinae)
- hilli Hedley, 1894 = Pleurobranchus hilli (family Pleurobranchidae – Pleurobranchinae)
- hilum Hedley, 1908 = Austropusilla hilum (family Turridae – Unplaced)
- hirsuta Lamarck, 1819 = Trichomya hirsuta (family Mytilidae)
- hirta Crioscino & Ponder, 2011 = Merelina hirta (family Rissoidae – Rissoinae)
- hisseyiana Tenison Woods, 1876 = Gibbula hisseyiana (family Trochidae – Trochinae)
- hofmani Angas, 1877 = Turbonilla mariae (family Pyramidellidae – Turbonillinae)
- hoggartae Gabriel, 1956 = Pisinna costata (family Anabathridae)
- homalon Verco, 1907 = Circulus harriettae (family Tornidae – Circulinae)
- horia Cotton, 1953 = Neotrigonia bednalli (family Trigoniidae)
- horikoshii Okutani, 1982 = Fissidentalium horikoshii (family Dentaliidae)
- howelli Iredale, 1931 = Umbilia hesitata (family Cypraeidae – Gisortiinae)
- howitti Pritchard & Gatliff, 1899 = Splendrillia woodsi (family Drillidae)
- hoylei superior Iredale, 1939 = Tucetona gealei (family Glycymerididae)
- hoylei Pfeffer, 1884 = Abraliopsis hoylei (family Enoploteuthidae)
- hulli Tate, 1893 = Alvania fasciata (family Rissoidae – Rissoinae)
- hulliana eucraspeda Hedley, 1911 = Alvania fasciata (family Rissoidae – Rissoinae)
- humerica Laseron, 1957 = Mesoginella translucida (family Marginellidae – Marginellinae)
- humilis Crosse & Fischer, 1865 = Phycothais reticulata (family Muricidae – Rapaninae)
- huonensis Tenison Woods, 1876 = Tatea huonensis (family Hydrobiidae – Tateinae)
- hutchingsae Ponder & Yoo, 1980 = Eatonina hutchingsae (family Cingulopsidae)
- huttoni Suter, 1913 = Anomia trigonopsis (family Anomiidae – Anomiinae)
- hystrix Broderip, 1834 = Bostrycapulus pretzgeri (family Calyptraeidae)