Opinions from L. W. Wiedey 1928
- 'Agasoma andersoni belongs to Agasoma'
- 'Agasoma oregonense is replaced by Agasoma andersoni'
- 'Arca galei belongs to Arca'
- 'Arca hamelini belongs to Arca'
- 'Arca impavida belongs to Arca'
- 'Arca lakei belongs to Arca'
- 'Arca perdisparis belongs to Arca'
- 'Arca procumbens belongs to Arca'
- 'Arca rivulata belongs to Arca'
- 'Arca sespeensis belongs to Arca'
- 'Architectonica compressa belongs to Architectonica'
- 'Cardium arcumbona belongs to Cardium'
- 'Clementia elongata belongs to Clementia'
- 'Clementia inequalis belongs to Clementia'
- 'Conus juanensis belongs to Conus'
- 'Dosinia margaritana belongs to Dosinia'
- 'Macoma copelandi belongs to Macoma'
- 'Macoma panzana belongs to Macoma'
- 'Ostrea howelli belongs to Ostrea'
- 'Panope tenuis belongs to Panope'
- 'Pholadomya kernensis belongs to Pholadomya'
- 'Pteria hertleini belongs to Pteria'
- 'Pteria jordani belongs to Pteria'
- 'Purpura vaquerosensis is recombined as Rapana vaquerosensis'
- 'Purpura vaquerosensis is recombined as Rapana vaquerosensis' according to J. P. Smith 1919
- 'Purpura vaquerosensis is recombined as Thais vaquerosensis' according to English and Prutzman 1926
- 'Rapana serrai belongs to Rapana'
- 'Serpula careyi belongs to Serpula'
- 'Spondylus inezana belongs to Spondylus'
- 'Tellina oldroydi belongs to Tellina'
- 'Turritella bosei belongs to Turritella'
- 'Turritella inezana pertumida belongs to Turritella inezana'
- 'Turritella montereyana belongs to Turritella'
- 'Turritella ocoyana belongs to Turritella'
- 'Turritella temblorensis belongs to Turritella'
- 'Turritella variata belongs to Turritella'
- 'Turritella wittichi is a subjective synonym of Turritella ocoyana'