Opinions from U. S. Grant, IV and H. R. Gale 1931
- 'Acila was reranked as Nucula (Acila) and belongs to Nucula'
- 'Antiplanes was reranked as Spirotropis (Antiplanes) and belongs to Spirotropis'
- 'Antiplanes bulimoides belongs to Antiplanes' according to Dall 1919
- 'Antiplanes bulimoides is recombined as Spirotropis (Antiplanes) bulimoides'
- 'Arca belongs to Arcidae'
- 'Arca (Arca) belongs to Arca'
- 'Arca (Arca) perlabiata belongs to Arca (Arca)'
- 'Arca (Arca) trilineata calcarea belongs to Arca (Arca) trilineata'
- 'Arca (Navicula) terminumbonis belongs to Arca (Navicula)'
- 'Arca camuloensis is recombined as Arca (Arca) multicostata camuloensis'
- 'Arca canalis is a subjective synonym of Arca (Arca) trilineata'
- 'Arca formosa is recombined as Arca (Arca) formosa'
- 'Arca grandis is recombined as Arca (Arca) grandis'
- 'Arca labiata belongs to Arca' according to Sowerby 1833
- 'Arca labiata belongs to Arca' according to Solander 1786
- 'Arca labiata is recombined as Arca (Scapharca) labiata' according to Stearns 1894
- 'Arca (Scapharca) labiata is replaced by Arca (Arca) perlabiata'
- 'Arca multicostata is recombined as Arca (Arca) multicostata'
- 'Arca multicostata is recombined as Arca (Scapharca) multicostata' according to Stearns 1894
- 'Arca multicostata is recombined as Arca (Anadara) multicostata' according to Mahille 1895
- 'Arca pernula is recombined as Nuculana (Nuculana) pernula'
- 'Arca reeveana is recombined as Arca (Barbatia) reeveana'
- 'Arca reticulata is recombined as Arca (Barbatia) reticulata'
- 'Arca schizotoma belongs to Arca' according to Dall 1898
- 'Arca schizotoma is a subjective synonym of Arca (Arca) trilineata'
- 'Arca sulcicosta belongs to Arca' according to Nyst 1836
- 'Arca sulcicosta is a subjective synonym of Arca (Arca) trilineata'
- 'Arca sulcicosta is replaced by Arca schizotoma' according to Dall 1898
- 'Arca tenuis is recombined as Nucula (Nucula) tenuis'
- 'Arca trilineata is recombined as Arca (Arca) trilineata'
- 'Arca trilineata is recombined as Arca (Scapharca) trilineata' according to Dall 1909
- 'Arca tuberculosa is recombined as Arca (Arca) tuberculosa'
- 'Argobuccinum (Priene) pacifica is recombined as Ranella (Priene) pacifica'
- 'Atrina was reranked as Pinna (Atrina) and belongs to Pinna'
- 'Axinaea septentrionalis subobsoleta is recombined as Glycymeris septentrionalis subobsoleta'
- 'Glycymeris conradi is replaced by Glycymeris larvula' according to Hanna 1924
- 'Axinea conradi is recombined as Glycymeris conradi' according to Dall 1909
- 'Glycymeris conradi is a subjective synonym of Glycymeris grewingki'
- 'Barbatia was reranked as Arca (Barbatia) and belongs to Arca'
- 'Bryophila setosa belongs to Bryophila' according to Carpenter 1864
- 'Bryophila setosa is recombined as Philobrya setosa'
- 'Byssoarca pacifica is recombined as Arca (Navicula) pacifica'
- 'Byssoarca pacifica is recombined as Arca pacifica' according to Reeve 1844
- 'Calliostoma coalingensis is corrected as Calliostoma coalingense and belongs to Calliostoma'
- 'Callista concinna is recombined as Pitaria concinna'
- 'Cancellaria (Euclia) tritonidea is recombined as Cancellaria tritonidea'
- 'Cancellaria (Narona) cooperii is recombined as Cancellaria cooperi'
- 'Cancellaria arnoldi belongs to Cancellaria' according to Dall 1909
- 'Cancellaria fergusoni belongs to Cancellaria'
- 'Cancellaria hemphilli belongs to Cancellaria' according to Dall 1909
- 'Cardium (Cerastoderma) coosense is recombined as Laevicardium (Cerastoderma) corbis coosense'
- 'Cardium (Granocardium) is a subjective synonym of Laevicardium (Trachycardium)'
- 'Cardium corbis is recombined as Laevicardium (Cerastoderma) corbis'
- 'Cardium magnificum is recombined as Fragum magnificum'
- 'Cardium spinosum is recombined as Papyridea spinosa'
- 'Cardium substriatum is recombined as Laevicardium (Laevicardium) substriatum'
- 'Chione fernandoensis belongs to Chione' according to English 1914
- 'Chione fernandoensis is recombined as Venus (Chione) securis fernandoensis'
- 'Clathrodrillia was reranked as Clavus (Clathrodrillia) and belongs to Clavus'
- 'Columbella carinata is recombined as Mitrella carinata'
- 'Columbella gausapata is recombined as Mitrella carinata gausapata'
- 'Conchocele disjuncta is recombined as Thyasira disjuncta'
- 'Conus californicus belongs to Conus'
- 'Corbula (Corbula) gibbiformis belongs to Corbula (Corbula)'
- 'Cypraea pustulata is recombined as Trivia pustulata'
- 'Cytherea callosa is recombined as Amiantis callosa'
- 'Cytherea lupanaria is recombined as Amiantis (Hysteroconcha) lupanaria'
- 'Dentalium indianorum belongs to Dentalium' according to Carpenter 1864
- 'Dentalium indianorum is a subjective synonym of Dentalium pretiosum'
- 'Dentalium liratum belongs to Dentalium' according to Carpenter 1855
- 'Dentalium liratum is a subjective synonym of Dentalium semistriatum semipolitum'
- 'Dentalium lirulatum belongs to Dentalium' according to Mörch 1861
- 'Dentalium lirulatum is a subjective synonym of Dentalium semistriatum semipolitum'
- 'Dentalium neohexagonum belongs to Dentalium'
- 'Dentalium petricola belongs to Dentalium' according to Dall 1909
- 'Dentalium petricola is a subjective synonym of Dentalium rectius'
- 'Dentalium pretiosum belongs to Dentalium' according to Nuttall in Sowerby 1860
- 'Dentalium pretiosum belongs to Dentalium'
- 'Dentalium rectius belongs to Dentalium' according to Carpenter 1864
- 'Dentalium rectius belongs to Dentalium'
- 'Dentalium semipolitum is recombined as Dentalium semistriatum semipolitum'
- 'Dentalium semipolitum belongs to Dentalium' according to Broderip and Sowerby 1829
- 'Dentalium semistriatum belongs to Dentalium'
- 'Dentalium semistriatum belongs to Dentalium' according to Turton 1819
- 'Drillia incisa belongs to Drillia' according to Hinds 1843
- 'Drillia incisa is recombined as Moniliopsis incisa'
- 'Drillia torosa is recombined as Pseudomelatoma torosa' according to Dall 1921
- 'Drillia torosa is recombined as Pseudomelatoma torosa' according to Oldroyd 1927
- 'Drillia torosa belongs to Drillia' according to Keep 1904
- 'Drillia torosa belongs to Drillia' according to Cooper 1888
- 'Drillia torosa is recombined as Pseudomelatoma torosa' according to Grant and Gale 1931
- 'Fusus barbarensis is recombined as Fusinus barbarensis'
- 'Fusus kelletii is recombined as Kelletia (Kelletia) kelletii'
- 'Glycymeris belongs to Arcidae'
- 'Glycymeris coalingensis is a subjective synonym of Glycymeris grewingki'
- 'Glycymeris corteziana belongs to Glycymeris' according to Dall 1916
- 'Glycymeris corteziana belongs to Glycymeris'
- 'Glycymeris gabbi belongs to Glycymeris' according to Dall 1909
- 'Glycymeris gabbi is a subjective synonym of Glycymeris grewingki'
- 'Glycymeris grewingki belongs to Glycymeris'
- 'Glycymeris larvula is a subjective synonym of Glycymeris grewingki'
- 'Glycymeris larvula belongs to Glycymeris' according to Hanna 1924
- 'Hysteroconcha was reranked as Amiantis (Hysteroconcha) and belongs to Amiantis'
- 'Janira bella is recombined as Pecten (Janira) bellus'
- 'Jaton was reranked as Purpura (Jaton) and belongs to Purpura'
- 'Kelletia (Kelletia) belongs to Kelletia' according to Fischer 1884
- 'Kelletia (Kelletia) belongs to Kelletia'
- 'Leda (Lembulus) whitmani belongs to Leda (Lembulus)' according to Dall 1909
- 'Leda (Lembulus) whitmani is recombined as Nuculana whitmani'
- 'Leda cellulita belongs to Leda' according to Dall 1896
- 'Leda cellulita is recombined as Nuculana cellulita'
- 'Leda fossa belongs to Leda' according to Baird 1863
- 'Leda fossa is recombined as Nuculana fossa'
- 'Leda hamata is recombined as Nuculana hamata'
- 'Leda orcutti is recombined as Nuculana orcutti'
- 'Leda oregona is recombined as Yoldia oregona'
- 'Leda oxia belongs to Leda' according to Dall 1916
- 'Leda oxia is recombined as Nuculana oxia'
- 'Leda penderi is recombined as Nuculana penderi'
- 'Leda penderi belongs to Leda' according to Dall and Bartsch 1910
- 'Leda taphria is recombined as Nuculana taphria'
- 'Leda williamettensis belongs to Leda' according to Shumard 1858
- 'Leda williamettensis is recombined as Nuculana williamettensis'
- 'Lucina acutilineata is recombined as Lucina (Myrtea) acutilineata'
- 'Lucina nuttalli is recombined as Lucina (Myrtea) nuttallii'
- 'Lyropecten was reranked as Pecten (Lyropecten) and belongs to Pecten'
- 'Malletia belongs to Nuculanidae'
- 'Margaritiphora mazatlanica belongs to Margaritiphora' according to Hanley 1855
- 'Margaritiphora mazatlanica is recombined as Pteria (Pinctada) mazatlanica'
- 'Margaritiphora mazatlanica is recombined as Margaritifera mazatlanica' according to Hanna and Hertlein 1927
- 'Megasurcula was reranked as Surculites (Megasurcula) and belongs to Surculites'
- 'Metula remondii is recombined as Surculites (Megasurcula) remondii'
- 'Modiola recta is recombined as Volsella recta'
- 'Moniliopsis incisa quinquecincta belongs to Moniliopsis incisa'
- 'Murex eldridgei is recombined as Purpura (Jaton) eldridgei'
- 'Nassa cooperi is recombined as Nassarius (Schizopyga) mendicus cooperi'
- 'Nassa mendica is recombined as Nassarius (Schizopyga) mendicus'
- 'Natica reclusiana is recombined as Polinices (Neverita) reclusianus'
- 'Navicula was reranked as Arca (Navicula) and belongs to Arca'
- 'Neverita callosa is recombined as Polinices (Neverita) reclusianus callosa'
- 'Nucella was reranked as Thais (Nucella) and belongs to Thais'
- 'Nucula belongs to Nuculidae'
- 'Nucula (Acila) semirostrata belongs to Nucula (Acila)'
- 'Nucula (Nucula) belongs to Nucula'
- 'Nucula abrupta belongs to Nucula' according to Conrad 1848
- 'Nucula abrupta is recombined as Neilo abrupta' according to Conrad 1868
- 'Nucula abrupta is recombined as Malletia abrupta'
- 'Nucula acuta is recombined as Nuculana acuta'
- 'Nucula blancoensis belongs to Nucula' according to Howe 1922
- 'Nucula blancoensis is recombined as Nucula (Acila) blancoensis'
- 'Nucula castrensis is recombined as Nucula (Acila) castrensis'
- 'Nucula ermanni belongs to Nucula' according to Girard 1843
- 'Nucula ermanni is recombined as Nucula (Acila) ermanni'
- 'Nucula exigua is recombined as Nucula (Nucula) exigua'
- 'Nucula townsendi is recombined as Nucula (Nucula) townsendi'
- 'Nuculana belongs to Nuculanidae'
- 'Ostrea atwoodii is corrected as Ostrea atwoodi and belongs to Ostrea'
- 'Ostrea cerrosensis is a subjective synonym of Ostrea megodon'
- 'Ostrea conchaphila palmula is recombined as Ostrea palmula'
- 'Ostrea cumingiana belongs to Ostrea' according to Dunker 1846
- 'Ostrea cumingiana belongs to Ostrea'
- 'Ostrea erici belongs to Ostrea' according to Hertlein 1929
- 'Ostrea erici belongs to Ostrea'
- 'Ostrea fischeri is a subjective synonym of Ostrea cumingiana'
- 'Ostrea heermani belongs to Ostrea'
- 'Ostrea islandicus is recombined as Pecten (Pecten) islandicus'
- 'Ostrea lurida belongs to Ostrea'
- 'Ostrea megodon belongs to Ostrea'
- 'Ostrea tayloriana belongs to Ostrea'
- 'Ostrea veatchii is a subjective synonym of Ostrea vespertina'
- 'Ostrea vespertina belongs to Ostrea'
- 'Ostrea virginica californica belongs to Ostrea virginica' according to Mareon 1858
- 'Ostrea virginica californica is recombined as Ostrea californica'
- 'Pallium was reranked as Pecten (Pallium) and belongs to Pecten'
- 'Pallium estrellanum is recombined as Pecten (Lyropecten) estrellanum'
- 'Pecten belongs to Pectinidae'
- 'Pecten (Chlamys) bartschi is recombined as Pecten (Pecten) bartschi'
- 'Pecten (Chlamys) dallasi belongs to Pecten (Chlamys)' according to Jordan and Hertlein 1926
- 'Pecten (Chlamys) dallasi is recombined as Pecten (Pecten) dallasi'
- 'Pecten (Chlamys) hamlini is recombined as Pecten (Pallium) hamlini'
- 'Pecten (Chlamys) kindlei belongs to Pecten (Chlamys)' according to Dall 1920
- 'Pecten (Chlamys) kindlei is recombined as Pecten (Pallium) swiftii kindlei'
- 'Pecten (Chlamys) lioicus belongs to Pecten (Chlamys)' according to Dall 1907
- 'Pecten (Chlamys) lioicus is recombined as Pecten (Pecten) lioicus'
- 'Pecten (Chlamys) multirugosus is recombined as Pecten (Pecten) multirugosus'
- 'Pecten (Chlamys) nutteri is recombined as Pecten (Pallium) swiftii nutteri'
- 'Pecten (Patinopecten) healeyi belongs to Pecten (Patinopecten)'
- 'Pecten (Pecten) belongs to Pecten'
- 'Pecten (Pecten) coalingaensis is recombined as Pecten (Janira) bellus coalingaensis'
- 'Pecten (Plagioctenium) eldridgei is recombined as Pecten (Aequipecten) eldridgei'
- 'Pecten (Plagioctenium) hallae is recombined as Pecten (Aequipecten) hallae'
- 'Pecten (Propeamussium) belongs to Pecten'
- 'Pecten (Pseudamussium) alaskensis is recombined as Pecten (Propeamussium) alaskensis'
- 'Pecten calamitus is a subjective synonym of Pecten (Propeamussium) alaskensis'
- 'Pecten deserti is recombined as Pecten (Aequipecten) deserti'
- 'Pecten discus is recombined as Pecten (Aequipecten) discus'
- 'Pecten etchegoini is recombined as Pecten (Pallium) swiftii etchegoini'
- 'Pecten expansus belongs to Pecten' according to Smith 1847
- 'Pecten expansus belongs to Pecten' according to Dall 1879
- 'Pecten expansus is replaced by Pecten (Patinopecten) healeyi' according to Arnold 1909
- 'Pecten hastatus is recombined as Pecten (Pecten) hastatus'
- 'Pecten hindsii is corrected as Pecten hindsi and belongs to Pecten'
- 'Pecten islandicus beringianus belongs to Pecten islandicus' according to Middendorff 1849
- 'Pecten islandicus beringianus is recombined as Pecten (Pecten) beringianus'
- 'Pecten pabloensis is recombined as Pecten (Aequipecten) pabloensis'
- 'Pecten swiftii belongs to Pecten' according to Bernardi 1858
- 'Pecten swiftii is recombined as Pecten (Pallium) swiftii'
- 'Pecten tumbezensis is recombined as Pecten (Aequipecten) tumbezensis'
- 'Pectunculus giganteus belongs to Pectunculus' according to Reeve 1843
- 'Pectunculus giganteus is recombined as Glycymeris gigantea' according to Jordan 1924
- 'Glycymeris (Glycymeris) gigantea is a subjective synonym of Glycymeris maculata'
- 'Pectunculus inaequalis belongs to Pectunculus' according to Sowerby 1832
- 'Pectunculus inaequalis is recombined as Glycymeris inaequalis'
- 'Pectunculus kashewarowi belongs to Pectunculus' according to Grewingk 1848
- 'Pectunculus kashewarowi is recombined as Glycymeris kashewarowi'
- 'Pectunculus maculatus belongs to Pectunculus' according to Broderip 1832
- 'Pectunculus maculatus is recombined as Glycymeris maculata'
- 'Pectunculus multicostatus is recombined as Glycymeris multicostata'
- 'Pectunculus septentrionalis is recombined as Glycymeris septentrionalis'
- 'Phacoides (Miltha) xantusi is recombined as Lucina (Miltha) xantusi'
- 'Philobrya belongs to Philobryidae'
- 'Pinctada was reranked as Pteria (Pinctada) and belongs to Pteria'
- 'Pinna belongs to Pinnidae'
- 'Pinna (Pinna) belongs to Pinna'
- 'Pinna alamedensis belongs to Pinna' according to Yates, in Cooper 1888
- 'Pinna alamedensis is recombined as Pinna (Atrina) alamadensis'
- 'Pinna bicuneata is recombined as Pinna (Atrina) bicuneata'
- 'Pinna bicuneata belongs to Pinna' according to Nomland 1917
- 'Pinna latrania is recombined as Pinna (Pinna) latrania'
- 'Pinna mendenhalli is recombined as Pinna (Pinna) mendenhalli'
- 'Pleurotoma (Surcula) perversa is recombined as Spirotropis (Antiplanes) perversa'
- 'Pleurotoma coalingensis is recombined as Clavus (Clathrodrillia) coalingensis'
- 'Priene was reranked as Ranella (Priene) and belongs to Ranella'
- 'Pteria belongs to Pteriidae'
- 'Ptychostylis is a subjective synonym of Turcica'
- 'Solemya belongs to Solemyidae'
- 'Solemya ventricosa belongs to Solemya' according to Conrad 1849
- 'Solemya ventricosa belongs to Solemya'
- 'Spisula was reranked as Mactra (Spisula) and belongs to Mactra'
- 'Spisula (Hemimactra) brevirostrata is recombined as Mactra (Spisula) brevirostrata'
- 'Tellina idae is recombined as Tellina (Angulus) idae' according to Arnold 1903
- 'Tellina nevadensis belongs to Tellina' according to Anderson and Martin 1914
- 'Tellina nevadensis is a subjective synonym of Tellina idae'
- 'Thais (Nucella) elsmerensis belongs to Thais (Nucella)'
- 'Trisidos was reranked as Arca (Trisidos) and belongs to Arca'
- 'Triton gibbosus is recombined as Cabestana gibbosa'
- 'Trochus (Monodonta) gallina belongs to Trochus (Monodonta)' according to Forbes 1850
- 'Trochus (Monodonta) gallina is recombined as Tegula (Chlorostoma) gallina'
- 'Trochus (Monodonta) pyriformis belongs to Trochus (Monodonta)' according to Gould 1853
- 'Trochus (Monodonta) pyriformis is a subjective synonym of Tegula (Chlorostoma) gallina'
- 'Turbonilla (Turbonilla) belongs to Turbonilla' according to Risso 1826
- 'Turris kincaidi is recombined as Spirotropis kincaidi'
- 'Turritella cooperi belongs to Turritella'
- 'Turritella cooperi fernandoensis belongs to Turritella cooperi' according to Arnold 1907
- 'Turritella cooperi fernandoensis is an invalid subgroup of Turritella cooperi'
- 'Turritella nova is a subjective synonym of Turritella cooperi'
- 'Venus securis belongs to Venus' according to Shumard 1858
- 'Venus securis is recombined as Venus (Chione) securis'
- 'Venus succincta is recombined as Venus (Chione) succincta'
- 'Yoldia belongs to Nuculanidae'
- 'Yoldia (Cnesterium) strigilata belongs to Yoldia (Cnesterium)' according to Dall 1909
- 'Yoldia (Cnesterium) strigilata is recombined as Yoldia scissurata strigilata'
- 'Yoldia (Kalayoldia) belongs to Yoldia'
- 'Yoldia cooperii is corrected as Yoldia cooperi and belongs to Yoldia'
- 'Yoldia scissurata belongs to Yoldia' according to Dall 1897
- 'Yoldia scissurata belongs to Yoldia'