Taxonomic names from R. B. Stewart 1930
- Acanthocardia (Schedocardia) (R. B. Stewart 1930) [Cardiidae]
- Agnocardia (R. B. Stewart 1930) [Cardiidae]
- Agnomyax, R. B. Stewart 1930 [Tellinidae]
- Americardia (R. B. Stewart 1930) [Cardiidae]
- Aucella concentrica, White 1888 [Buchiidae]
- Aucella trigonoides, Lahusen Smith 1894 [Buchiidae]
- Bathytormus, R. B. Stewart 1930 [Crassatellidae]
- Calorhadia, R. B. Stewart 1930 [Nuculanidae]
- Calorhadia pharcida (Dall 1898) [Nuculanidae]
- Cardium (Americardia) (R. B. Stewart 1930) [Cardiidae]
- Claibornites, R. B. Stewart 1930 [Lucinidae]
- Claibornites (Saxolucina), R. B. Stewart 1930 [Lucinidae]
- Claibornites (Saxolucina) saxorum (Lamarck 1806) [Lucinidae]
- Clementia obliqua, Jukes-Brown 1913 [Veneridae]
- Codalucina (R. B. Stewart 1930) [Lucinidae]
- Compsomyax (R. B. Stewart 1930) [Veneridae]
- Cryptodon bisectus, Dall 1890 [Thyasiridae]
- Dallocardia (R. B. Stewart 1930) [Cardiidae]
- Delectopecten (R. B. Stewart 1930) [Pectinidae]
- Diodus, Gabb 1869 [Diodus]
- Eosolen (R. B. Stewart 1930) [Solenidae]
- Eucrassatella (Hybolophus) gibbosus (Sowerby 1832) [Crassatellidae]
- Glyptoactis (R. B. Stewart 1930) [Carditidae]
- Grammatodon (Nanonavis) (R. B. Stewart 1930) [Parallelodontidae]
- Grammatodon carinatus, Woods 1899 [Parallelodontidae]
- Halonanus, R. B. Stewart 1930 [Arcidae]
- Halonanus pulchra (Gabb 1860) [Arcidae]
- Hybolophus (R. B. Stewart 1930) [Crassatellidae]
- Leda acala, Dall 1898 [Nuculanidae]
- Leuroactis (R. B. Stewart 1930) [Cardiida]
- Linearia suciensis, Whiteaves 1879 [Tellinidae]
- Lithorhadia (R. B. Stewart 1930) [Nuculanidae]
- Loripinus (Eophysema), R. B. Stewart 1930 [Lucinidae]
- Loripinus (Pegophysema) schrammi (Crosse 1876) [Lucinidae]
- Lucina (Claibornites), R. B. Stewart 1930 [unclassified subgenus]
- Lucina (Claibornites) rotunda, Lea 1833 [Lucinidae]
- Lucina (Codalucina), R. B. Stewart 1930 [unclassified subgenus]
- Lucina (Codalucina) uncinata, Defrance 1823 [unclassified species]
- Lucina (Quasilucina), R. B. Stewart 1930 [Lucinidae]
- Lucina (Quasilucina) carinifera (Conrad 1833) [Lucinidae]
- Lucina subvexa, Conrad 1833 [Lucinidae]
- Lucina uncinata, Defrance 1823 [Lucinidae]
- Mexicardia (R. B. Stewart 1930) [Cardiidae]
- Microcallista, R. B. Stewart 1930 [Veneridae]
- Miltha (Plastomiltha), R. B. Stewart 1930 [Lucinidae]
- Miltha (Plastomiltha) claibornensis (Conrad 1865) [Lucinidae]
- Myrtea gabbi, R. B. Stewart 1930 [Lucinidae]
- Nanonavis (R. B. Stewart 1930) [Parallelodontidae]
- Neithea (Neitheops) (R. B. Stewart 1930) [Neitheidae]
- Neitheops, R. B. Stewart 1930 [Pterioida]
- Nucula truncata, Nilsson 1828 [Nuculidae]
- Ostrea megadon (Hanley 1846) [Ostreidae]
- Pegophysema (R. B. Stewart 1930) [Lucinidae]
- Phlogocardia (R. B. Stewart 1930) [Cardiidae]
- Plagiostoma concentrica (White 1888) [Buchiidae]
- Plastomiltha (R. B. Stewart 1930) [Lucinidae]
- Portlandella (R. B. Stewart 1930) [Sareptidae]
- Rhectomyax, Stewart 1930 [Kelliidae]
- Saxolucina (R. B. Stewart 1930) [Lucinidae]
- Schedocardia (R. B. Stewart 1930) [Cardiidae]
- Schedotrapezium (R. B. Stewart 1930) [Arcticidae]
- Solena (Eosolen) obliquus (Spengler 1794) [Solenidae]
- Spisula (Stereomactra), R. B. Stewart 1930 [Mactridae]
- Trachycardium (Dallocardia) quadrigenarium (Conrad 1837) [Cardiidae]
- Trapezium (Schedotrapezium), R. B. Stewart 1930 [Trapezidae]
- Trigoniocardia (Americardia) medium (Linnaeaus 1758) [Cardiidae]
- Venericardia (Leuroactis), R. B. Stewart 1930 [Carditidae]
- Venericardia (Leuroactis) horatiana (Gardner 1927) [Carditidae]
- Venericardia (Venericor) hornii calafia, R. B. Stewart 1930 [Carditidae]
- Venericardia pilsbryi, R. B. Stewart 1930 [Carditidae]
- Venericor (R. B. Stewart 1930) [Carditidae]
- Volsella telea, R. B. Stewart 1930 [Mytilidae]
- Yoldia cooperii supramontereyensis (Arnold 1908) [Yoldiidae]