Haematocleptes terebellidis Wirén, 1885 – synonym of Haematocleptes terebellidis
Halithea hystrix – synonym of Hermonia hystrix
Halithea hystrix Savigny, 1818 – synonym of Hermonia hystrix
Halosydna gelatinosa – synonym of Alentia gelatinosa
Halosydna gelatinosa Hornell, 1891 – synonym of Alentia gelatinosa
Halosydna jeffreysii – synonym of Alentia gelatinosa
Halosydna jeffreysii Lankester, 1866 – synonym of Alentia gelatinosa
Haplobranchus aestuarinus – synonym of Manayunkia aestuarina
Haplobranchus aestuarinus Bourne, 1883 – synonym of Manayunkia aestuarina
Haplobranchus balticus – synonym of Manayunkia aestuarina
Haplobranchus balticus Karling, 1933 – synonym of Manayunkia aestuarina
Harmothoe (Antinoella) sarsi promamme – synonym of Antinoe finmarchica
Harmothoe (Antinoella) sarsi promamme Hartmann-Schröder, 1971 – synonym of Antinoe finmarchica
Harmothoe abyssicola – synonym of Harmothoe impar
Harmothoe abyssicola Bidenkap, 1894 – synonym of Harmothoe impar
Harmothoe andreapolis – synonym of Malmgrenia andreapolis
Harmothoe andreapolis Tebble & Chambers, 1982 – synonym of Malmgrenia andreapolis
Harmothoe antilopes McIntosh, 1876 – synonym of Harmothoe antilopes
Harmothoe arenicolae – synonym of Malmgrenia arenicolae
Harmothoe arenicolae Saint-Joseph, 1888 – synonym of Malmgrenia arenicolae
Harmothoe aspera Ditlevsen, 1917 – synonym of Harmothoe aspera
Harmothoe borealis Hartmann-Schröder, 1971 – synonym of Harmothoe borealis
Harmothoe castanea – synonym of Malmgrenia castanea
Harmothoe castanea Tebble & Chambers, 1982 – synonym of Malmgrenia castanea
Harmothoe echinopustulata – synonym of Leucia nivea
Harmothoe echinopustulata Fauvel, 1913 – synonym of Leucia nivea
Harmothoe extenuata Tebble & Chambers, 1982 – synonym of Harmothoe extenuata
Harmothoe fragilis Moore, 1910 – synonym of Harmothoe fragilis
Harmothoe furcosetosa – synonym of Malmgrenia furcosetosa
Harmothoe furcosetosa Tebble & Chambers, 1982 – synonym of Malmgrenia furcosetosa
Harmothoe glabra – synonym of Malmgrenia glabra
Harmothoe glabra Tebble & Chambers, 1982 – synonym of Malmgrenia glabra
Harmothoe haliaeti – synonym of Malmgrenia mcintoshi
Harmothoe haliaeti Fauvel, 1914 – synonym of Malmgrenia mcintoshi
Harmothoe imbricata McIntosh, 1900 – synonym of Harmothoe imbricata
Harmothoe impar McIntosh, 1900 – synonym of Harmothoe impar
Harmothoe impar var. Pagenstecheri – synonym of Harmothoe pagenstecheri
Harmothoe impar var. Pagenstecheri Michaelsen, 1896 – synonym of Harmothoe pagenstecheri
Harmothoe Johnstoni Gage, 1972 – synonym of Antinoe finmarchica
Harmothoe joubini – synonym of Malmgrenia arenicolae
Harmothoe joubini Clark & Dawson, 1963 – synonym of Malmgrenia arenicolae
Harmothoe ljungmani – synonym of Malmgrenia ljungmani
Harmothoe ljungmani McIntosh, 1900 – synonym of Malmgrenia ljungmani
Harmothoe longisetis – synonym of Malmgrenia glabra
Harmothoe longisetis Fauvel, 1923 – synonym of Malmgrenia glabra
Harmothoe lunulata – synonym of Malmgrenia castanea
Harmothoe lunulata – synonym of Malmgrenia lunulata
Harmothoe lunulata – synonym of Malmgrenia marphysae
Harmothoe lunulata Fauvel, 1923 – synonym of Malmgrenia lunulata
Harmothoe lunulata Hartmann-Schröder, 1971 – synonym of Malmgrenia castanea
Harmothoe lunulata McIntosh, 1900 – synonym of Malmgrenia marphysae
Harmothoe lunulata var. andreapolis – synonym of Malmgrenia andreapolis
Harmothoe lunulata var. andreapolis Fauvel, 1923 – synonym of Malmgrenia andreapolis
Harmothoe lunulata var. arenicolae – synonym of Malmgrenia arenicolae
Harmothoe lunulata var. arenicolae Fauvel, 1923 – synonym of Malmgrenia arenicolae
Harmothoe lunulata var. marphysae – synonym of Malmgrenia marphysae
Harmothoe lunulata var. marphysae Fauvel, 1923 – synonym of Malmgrenia marphysae
Harmothoe lunulata var. synaptae – synonym of Malmgrenia andreapolis
Harmothoe lunulata var. synaptae Fauvel, 1923 – synonym of Malmgrenia andreapolis
Harmothoe Macleodi – synonym of Malmgrenia ljungmani
Harmothoe Macleodi McIntosh, 1875 – synonym of Malmgrenia ljungmani
Harmothoe marphysae – synonym of Malmgrenia marphysae
Harmothoe marphysae McIntosh, 1876 – synonym of Malmgrenia marphysae
Harmothoe marphysae var. watsoni – synonym of Malmgrenia marphysae
Harmothoe marphysae var. watsoni McIntosh, 1919 – synonym of Malmgrenia marphysae
Harmothoe mcintoshi – synonym of Malmgrenia mcintoshi
Harmothoe mcintoshi Tebble & Chambers, 1982 – synonym of Malmgrenia mcintoshi
Harmothoe mollis – synonym of Austrolaenilla mollis
Harmothoe mollis Hartmann-Schröder, 1971 – synonym of Austrolaenilla mollis
Harmothoe multisetosa – synonym of Harmothoe aspera
Harmothoe multisetosa Pettibone, 1953 – synonym of Harmothoe aspera
Harmothoe nivea – synonym of Leucia nivea
Harmothoe nivea Ditlevsen, 1917 – synonym of Leucia nivea
Harmothoe nodosa – synonym of Eunoe nodosa
Harmothoe nodosa Hartmann-Schröder, 1971 – synonym of Eunoe nodosa
Harmothoe reticulata – synonym of Malmgrenia mcintoshi
Harmothoe reticulata Spooner 1957 – synonym of Malmgrenia mcintoshi
Harmothoe sarniensis – synonym of Harmothoe extenuata
Harmothoe sarniensis Lankester, 1866 – synonym of Harmothoe extenuata
Harmothoe sarsi – synonym of Bylgides sarsi
Harmothoe sarsi Eliason, 1920 – synonym of Bylgides sarsi
Harmothoe sarsi promamme – synonym of Bylgides groenlandicus
Harmothoe sarsi promamme Hartmann-Schröder, 1974 – synonym of Bylgides groenlandicus
Harmothoe sarsi sarsi – synonym of Bylgides elegans
Harmothoe sarsi sarsi – synonym of Bylgides sarsi
Harmothoe sarsi sarsi Auctt. non Kinberg – synonym of Bylgides elegans
Harmothoe sarsi sarsi Hartmann-Schröder, 1971 – synonym of Bylgides sarsi
Harmothoe sarsii forma balthica – synonym of Bylgides sarsi
Harmothoe sarsii forma balthica Malm, 1874 – synonym of Bylgides sarsi
Harmothoe setosissima – synonym of Malmgrenia glabra
Harmothoe setosissima McIntosh, 1900 – synonym of Malmgrenia glabra
Harmothoe Sibbaldii – synonym of Harmothoe spinifera
Harmothoe Sibbaldii McIntosh, 1876 – synonym of Harmothoe spinifera
Harmothoe spinifera McIntosh, 1900 – synonym of Harmothoe spinifera
Harmothoe villosa – synonym of Eucranta villosa
Harmothoe villosa Hartmann-Schröder, 1971 – synonym of Eucranta villosa
Harmothoe viridis Loshamn, 1981 – synonym of Harmothoe viridis
Harmothoe zetlandica – synonym of Malmgrenia ljungmani
Harmothoe zetlandica McIntosh, 1876 – synonym of Malmgrenia ljungmani
Hauchiella peterseni – synonym of Hauchiella tribullata
Hauchiella peterseni Levinsen, 1893 – synonym of Hauchiella tribullata
Hauchiella tribullata Hessle, 1917 – synonym of Hauchiella tribullata
Hediste diversicolor – synonym of Nereis diversicolor
Hediste diversicolor Malmgren, 1867 – synonym of Nereis diversicolor
Hedyle lobulata – synonym of Perinereis cultrifera
Hedyle lobulata Malmgren, 1865 – synonym of Perinereis cultrifera
Hermadion assimile – synonym of Adyte pellucida
Hermadion assimile McIntosh, 1876 – synonym of Adyte pellucida
Hermadion pellucidum – synonym of Adyte pellucida
Hermadion pellucidum Hornell, 1891 – synonym of Adyte pellucida
Hermione hystrix – synonym of Hermonia hystrix
Hermione hystrix Savigny, 1820 – synonym of Hermonia hystrix
Hermodice carunculata Fauvel, 1923 – synonym of Hermodice carunculata
Hermonia hystrix Hartmann-Schröder, 1971 – synonym of Hermonia hystrix
Hesionides arenaria Friedrich, 1937 – synonym of Hesionides arenaria
Hesionides maxima Westheide, 1967 – synonym of Hesionides maxima
Hesionura augeneri – synonym of Hesionura elongata
Hesionura augeneri Hartmann-Schröder, 1971 – synonym of Hesionura elongata
Hesionura elongata Pleijel, 1993 – synonym of Hesionura elongata
Heterocirrus alatus – synonym of Caulleriella alata
Heterocirrus alatus Fauvel, 1927 – synonym of Caulleriella alata
Heterocirrus bioculatus – synonym of Caulleriella bioculata
Heterocirrus bioculatus Fauvel, 1927 – synonym of Caulleriella bioculata
Heterocirrus caput-esocis – synonym of Caulleriella caput-esocis
Heterocirrus caput-esocis Saint-Joseph, 1894 – synonym of Caulleriella caput-esocis
Heterocirrus killariensis – synonym of Tharyx killariensis
Heterocirrus killariensis Fauvel, 1927 – synonym of Tharyx killariensis
Heterocirrus marioni – synonym of Aphelochaeta marioni
Heterocirrus marioni Saint-Joseph, 1894 – synonym of Aphelochaeta marioni
Heterocirrus multibranchis – synonym of Aphelochaeta multibranchis
Heterocirrus multibranchis Grube, 1863 – synonym of Aphelochaeta multibranchis
Heterocirrus viridis – synonym of Caulleriella bioculata
Heterocirrus viridis McIntosh, 1915 – synonym of Caulleriella bioculata
Heteroclymene robusta – synonym of Euclymene robusta
Heteroclymene robusta Arwidsson, 1906 – synonym of Euclymene robusta
Heteromastus filiformis Eisig, 1887 – synonym of Heteromastus filiformis
Heteronereis fucicola – synonym of Platynereis dumerilii
Heteronereis fucicola Oersted, 1843 – synonym of Platynereis dumerilii
Heteronereis glaucopsi – synonym of Nereis fucata
Heteronereis glaucopsis Malm, 1874 – synonym of Nereis fucata
Heteronereis grandifolia – synonym of Nereis zonata
Heteronereis grandifolia Malmgren, 1865 part – synonym of Nereis zonata
Heteronereis paradoxa – synonym of Nereis longissima
Heteronereis paradoxa Oersted, 1843 – synonym of Nereis longissima
Hipponoe jeffreysii – synonym of Paramphinome jeffreysii
Hipponoe jeffreysii McIntosh, 1868 – synonym of Paramphinome jeffreysii
Histriobdella homari Van Beneden, 1858 – synonym of Histriobdella homari
Hyalinoecia tubicola McIntosh, 1910 – synonym of Hyalinoecia tubicola
Hydroides incrustans – synonym of Hydroides elegans
Hydroides incrustans Monro, 1938 – synonym of Hydroides elegans
Hydroides norvegica Gunnerus, 1768 – synonym of Hydroides norvegica
Hydroides norvegicus – synonym of Hydroides norvegica
Hydroides norvegicus – synonym of Hydroides norvegica
Hypania invalida Annenkova, 1927 – synonym of Hypania invalida
Hypereteone lactea – synonym of Eteone foliosa
Hypereteone lactea – synonym of Eteone spetsbergensis
Hypereteone lactea Bergström, 1914 – synonym of Eteone foliosa
Hypereteone lactea Eliason, 1920 – synonym of Eteone spetsbergensis
Hypoeulalia bilineata – synonym of Eulalia bilineata
Hypoeulalia bilineata Bergstrom, 1914 – synonym of Eulalia bilineata
Hypsicomus rectangulus – synonym of Notaulax rectangulata
Hypsicomus rectangulus Auctt. – synonym of Notaulax rectangulata
Hypsicomus spec. – synonym of Notaulax rectangulata
Hypsicomus spec. Hartmann-Schröder, 1971 – synonym of Notaulax rectangulata