Acanthocardia abrupta (Gabb, 1860) † (status source)
Acanthotrophon striatus (Gabb, 1873) † (additional source)
Acesta multiradiata (Gabb, 1869) † (additional source)
Aclis microsculpta Gabb, 1881 † (additional source)
Aclis polita Gabb, 1873 † accepted as Odostomia santodomingensis Pilsbry & C. W. Johnson, 1917 † (additional source)
Acmaea rudis Gabb, 1869 † (additional source)
Acteon cretacea Gabb, 1861 † (additional source)
Acteon politus (Gabb, 1869) † (additional source)
Acteonella oviformis Gabb, 1869 † (additional source)
Acteonella oviformis Gabb, 1877 † (status source)
Acteonina californica Gabb, 1864 † accepted as Paosia californica (Gabb, 1864) † (additional source)
Acteonina pupoides Gabb, 1864 † accepted as Paosia calafia (R. B. Stewart, 1927) † (additional source)
Adelodonax altus (Gabb, 1864) † (additional source)
Agasoma sinuatum (Gabb, 1866) † (additional source)
Agnomyax monilifer (Gabb, 1864) † (additional source)
Alaba maoensis (Gabb, 1873) † (additional source)
Amauropsis altispira (Gabb, 1873) † (additional source)
Amiantis mathewsonii (Gabb, 1866) † (basis of record)
Amphidonte parasitica (Gabb, 1864) † (additional source)
Ampullina ortoni Gabb, 1869 † accepted as Euspira ortoni (Gabb, 1869) † (additional source)
Ampullina oviformis (Gabb, 1864) † (additional source)
Ampullina striata Gabb, 1869 † accepted as Lacunaria striata (Gabb, 1869) † (additional source)
Amusium lyonii (Gabb, 1881) † (additional source)
Amusium papyraceum (Gabb, 1873) † (additional source)
Anachis exilis (Gabb, 1873) † accepted as Parvanachis exilis (Gabb, 1872) † (additional source)
Anachis quadratus (Gabb, 1873) † (additional source)
Anchura carinifera Gabb, 1869 † (additional source)
Anchura falciformis (Gabb, 1864) † (additional source)
Anchura monilifera Gabb, 1869 † accepted as Aporrhais monilifera (Gabb, 1869) † (additional source)
Ancilla gabbi Cossmann, 1899 † (additional source)
Angaria cingulata Gabb, 1869 † (additional source)
Anodontia bulla (Gabb, 1873) † (basis of record)
Anomia ephippioides Gabb, 1860 † (additional source)
Anomia inornata (Gabb, 1864) † (basis of record)
Anomia lineata Gabb, 1864 † (additional source)
Anomia ornata Gabb, 1877 † (basis of record)
Anomia parva Gabb, 1861 † (additional source)
Anomia peruana Gabb, 1877 † (additional source)
Anomia vancouverensis Gabb, 1869 † (additional source)
Anthonya cultriformis Gabb, 1864 † (additional source)
Antiplanes voyi (Gabb, 1869) † (additional source)
Aporrhais bicarinata Gabb, 1877 † (additional source)
Aporrhais exilis Gabb, 1864 † accepted as Drepanochilus exilis (Gabb, 1864) † (additional source)
Aporrhais monilifera (Gabb, 1869) † (additional source)
Araeodactylus costatus (Gabb, 1869) † (additional source)
Arca (Anadara) pennelli Gabb, 1873 † accepted as Anadara pennelli (Gabb, 1873) † (additional source)
Arca altirostris Gabb, 1861 † accepted as Arca quindecemradiata Gabb, 1860 † (source of synonymy)
Arca bonaczyi (Gabb, 1873) † (basis of record)
Arca breweriana Gabb, 1864 † accepted as Nanonavis breweriana (Gabb, 1864) † (additional source)
Arca decurtata Gabb, 1864 † accepted as Idonearca gravida (Gabb, 1864) † (source of synonymy)
Arca gravida Gabb, 1864 † accepted as Idonearca gravida (Gabb, 1864) † (additional source)
Arca hornii Gabb, 1864 † accepted as Pachecoa hornii (Gabb, 1864) † (additional source)
Arca multilineata Gabb, 1873 † (additional source)
Arca oronlensis Gabb, 1881 † (basis of record)
Arca ovalis Gabb, 1877 † (additional source)
Arca quindecemradiata Gabb, 1860 † (additional source)
Arca sulcicosta Gabb, 1866 † accepted as Anadara trilineata (Conrad, 1857) † (additional source)
Architectonica abbottii Gabb, 1861 † accepted as Pleurotomaria crotaloides (S. G. Morton, 1834) † (source of synonymy)
Architectonica cognata Gabb, 1864 † (additional source)
Architectonica hornii Gabb, 1864 † (additional source)
Architectonica inornata Gabb, 1864 † accepted as Atira inornata (Gabb, 1864) † (additional source)
Architectonica meekana Gabb, 1860 † accepted as Granosolarium meekanum (Gabb, 1860) † (additional source)
Architectonica veatchii Gabb, 1864 † (additional source)
Architectonica vespertina Gabb, 1860 † (additional source)
Argopecten eccentricus (Gabb, 1873) † (additional source)
Asaphis undulata Gabb, 1864 † accepted as Rhectomyax undulata (Gabb, 1864) † (additional source)
Astarte appressa Gabb, 1869 † (additional source)
Astarte mathewsonii Gabb, 1864 † accepted as Crassatella uvasana mathewsonii (Gabb, 1864) † (additional source)
Astarte meridionalis Gabb, 1881 † (additional source)
Astarte tuscana Gabb, 1864 † accepted as Crassatella tuscana (Gabb, 1864) † (additional source)
Astartella moorei (Gabb, 1859) † (additional source)
Atira ornatissima (Gabb, 1864) † (additional source)
Atresius liratus Gabb, 1869 † (additional source)
Aurinia sinuosa (Gabb, 1861) † (additional source)
Avellana mathewsonii (Gabb, 1864) † (additional source)
Awateria retifera (Gabb, 1860) † (additional source)
Balanophyllia irrorata var. mortoni (Gabb & Horn, 1860) † (additional source)
Barbatia morsei Gabb, 1864 † (additional source)
Bela dorbignyana (Gabb, 1860) † (basis of record)
Beretra ripleyana (Conrad, 1858) † (additional source)
Biplica obliqua (Gabb, 1864) † (additional source)
Bittium costatum Gabb, 1873 † accepted as Schwartziella bryerea (Montagu, 1803) (source of synonymy)
Bittium yaquensis (Gabb, 1873) † (additional source)
Boggsia tenuis (Gabb, 1864) † (additional source)
Bolis enterogramma (Gabb, 1860) † (additional source)
Bonellitia paucivaricata (Gabb, 1864) † (basis of record)
Borsonella recurvirostris (Gabb, 1873) † (additional source)
Botula cretacea (Gabb, 1861) † (basis of record)
Brachidontes dichotomus (Gabb, 1864) † (basis of record)
Brachidontes multiradiatus (Gabb, 1866) † (additional source)
Brachidontes saffordi (Gabb, 1860) † (basis of record)
Brachysphingus sinuatus Gabb, 1869 † (additional source)
Bruclarkia gravida (Gabb, 1866) † (additional source)
Buccinopsis crassicosta (Gabb, 1877) † (additional source)
Buccinum liratum Gabb, 1864 † accepted as Brachysphingus sinuatus Gabb, 1869 † (additional source)
Buccitriton texanus (Gabb, 1860) † (basis of record)
Bulla hornii Gabb, 1864 † accepted as Roxania hornii (Gabb, 1864) † (additional source)
Bulla macrostoma Gabb, 1860 † (additional source)
Bulla recta Gabb, 1860 † accepted as Cylichna recta (Gabb, 1860) † (additional source)
Bullata semenoides (Gabb, 1860) † (additional source)