Opinions from G. D. Hanna 1924
- 'Ammonites nasturtium is recombined as Smithoceras nasturtium'
- 'Ammonites turneri is recombined as Acanthoceras turneri'
- 'Antiplanes rotula belongs to Antiplanes'
- 'Arca dalli is replaced by Arca invalida'
- 'Arca invalida belongs to Arca'
- 'Astarte acerba belongs to Astarte'
- 'Astarte sulcata is replaced by Astarte acerba'
- 'Borsonella angelana belongs to Borsonella'
- 'Borsonella polynotata belongs to Borsonella'
- 'Bullaria obtenta belongs to Bullaria'
- 'Bullaria tumida is replaced by Bullaria obtenta'
- 'Cancellaria angelana belongs to Cancellaria'
- 'Cancellaria crassa is replaced by Cancellaria simiana'
- 'Cancellaria fernandoensis tribulus is replaced by Cancellaria fernandoensis'
- 'Cancellaria quadrata is replaced by Cancellaria angelana'
- 'Cancellaria quadrata belongs to Cancellaria' according to Sowerby 1823
- 'Cancellaria rotunda is replaced by Cancellaria siletzensis'
- 'Cancellaria siletzensis belongs to Cancellaria'
- 'Cancellaria simiana belongs to Cancellaria'
- 'Cardium dalli is replaced by Cardium marysvillensis'
- 'Cerithium branneri is replaced by Cerithium teslaensis'
- 'Cerithium branneri belongs to Cerithium' according to White 1887
- 'Cerithium teslaensis belongs to Cerithium'
- 'Chama grunskyi belongs to Chama'
- 'Chama pacifica is replaced by Chama grunskyi'
- 'Chrysodomus packardi is replaced by Chrysodomus praenominata'
- 'Chrysodomus praenominata belongs to Chrysodomus'
- 'Corbula alaeformis is replaced by Corbula gabbii' according to Dall 1898
- 'Corbula dilatata is replaced by Corbula complicata'
- 'Corbula gabbii belongs to Corbula' according to Dall 1898
- 'Corbula gabbii is replaced by Leda polynominata'
- 'Corbula tenuis is replaced by Corbula binominata'
- 'Cryptoconus injucundus belongs to Cryptoconus'
- 'Cryptomya ovalis is replaced by Mya inopia'
- 'Drillia cooperi is replaced by Cryptoconus injucundus'
- 'Drillia ornata is replaced by Surcula polyappellatia'
- 'Ectinochilus is replaced by Rimetella'
- 'Eulima smithi is replaced by Pyramidella praecursor'
- 'Eulimella gabbiana is recombined as Melanella gabbiana'
- 'Fossarus barkeri belongs to Fossarus'
- 'Fossarus dalli is replaced by Fossarus barkeri'
- 'Fusinus (Priscofusus) lineatus is replaced by Fusinus obtentus'
- 'Fusinus obtentus belongs to Fusinus'
- 'Glycymeris conradi belongs to Glycymeris' according to Dall 1909
- 'Glycymeris conradi is replaced by Glycymeris larvata'
- 'Glycymeris larvata belongs to Glycymeris'
- 'Gyrodes insecuris belongs to Gyrodes'
- 'Hamites armatus is replaced by Hamites klamathensis'
- 'Hamites ellipticus is replaced by Hamites siskiyouensis'
- 'Hamites klamathensis belongs to Hamites'
- 'Hamites siskiyouensis belongs to Hamites'
- 'Leda denominata belongs to Leda'
- 'Leda milleri is replaced by Leda denominata'
- 'Leda polynominata belongs to Leda'
- 'Lucina cretacea belongs to Lucina'
- 'Marginella pacifica is replaced by Marginella instabilata'
- 'Meretrix dalli is replaced by Pitaria praenominata'
- 'Modiolus inflatus belongs to Modiolus' according to Dall 1909
- 'Modiolus inflatus is replaced by Modiolus trinominata'
- 'Morio (Sconsia) tuberculatus is recombined as Galeodea tuberculiformis'
- 'Murex (Ocinebra) concinna is replaced by Murex temalentus'
- 'Murex (Ocinebra) packardi is replaced by Murex (Ocinebra) rodeoensis'
- 'Murex (Ocinebra) rodeoensis belongs to Murex (Ocinebra)'
- 'Murex calamitus belongs to Murex'
- 'Murex concinnus belongs to Murex' according to Reeve 1845
- 'Murex temalentus belongs to Murex'
- 'Murex vaughani is replaced by Murex calamitus'
- 'Mya inopia belongs to Mya'
- 'Natica (Gyrodes) lineata is replaced by Gyrodes insecuris'
- 'Natica fiasco belongs to Natica'
- 'Neverita globosa is replaced by Natica fiasco'
- 'Nuculana gabbii is a nomen nudum'
- 'Odostomia (Evalea) andersoni is recombined as Odostomia andersoni'
- 'Ostrea titan corrugata is an invalid subgroup of Ostrea titan'
- 'Patella subquadrata is replaced by Acmaea ocitatia'
- 'Pecten (Lyropecten) gabbi is replaced by Pecten diabloensis'
- 'Pecten (Plagioctenium) cooperi is replaced by Pecten invalidus'
- 'Pecten (Propeamusium) levis is replaced by Pecten calamitus'
- 'Pecten (Pseudamusium) andersoni belongs to Pecten (Pseudamusium)' according to Dall 1918
- 'Pecten (Pseudamusium) andersoni is replaced by Pecten binominatus'
- 'Pecten binominatus belongs to Pecten'
- 'Pecten calamitus belongs to Pecten'
- 'Pecten diabloensis belongs to Pecten' according to Clark 1924
- 'Pecten gabbi belongs to Pecten' according to Dall 1898
- 'Pecten proteus is replaced by Pecten impostor'
- 'Pecten proteus belongs to Pecten' according to Sowerby 1847
- 'Periploma binominata belongs to Periploma'
- 'Periploma undulata is replaced by Periploma binominata'
- 'Phos dumbleana belongs to Phos'
- 'Pitaria praenominata belongs to Pitaria'
- 'Pleurotoma (Borsonia) dalli is replaced by Borsonella angelana'
- 'Pleurotoma (Clathurella) dumblei is replaced by Phos dumbleana'
- 'Pleurotoma (Drillia) dalli is replaced by Surcula hobsoni'
- 'Polycyclus is replaced by Smithoceras'
- 'Pyramidella praecursor belongs to Pyramidella'
- 'Spondylus fucatus belongs to Spondylus'
- 'Spondylus striatus is replaced by Spondylus fucatus'
- 'Strombus canalis is recombined as Rimetella canalis'
- 'Surcula binotata belongs to Surcula'
- 'Surcula evermanni belongs to Surcula'
- 'Surcula hobsoni belongs to Surcula'
- 'Surcula polyappellatia belongs to Surcula'
- 'Tellina tenuistriata is replaced by Tellina insurana'
- 'Turris (Drillia) modestus is replaced by Borsonella polynotata'
- 'Turris lincolnensis is replaced by Borsonella nuncapatia'
- 'Turris plicata is replaced by Surcula binotata'
- 'Turris pulchra is replaced by Surcula evermanni'
- 'Turritella conica is replaced by Turritella polynominata'
- 'Turritella polynominata belongs to Turritella'
- 'Turritella socordia belongs to Turritella'