Taxonomic names from W.O. Addicott 1970
- Acteon (Rictaxis) (Dall 1871) [Acteonidae]
- Acteon (Rictaxis) weaveri, W.O. Addicott 1970 [Acteonidae]
- Antillophos woodringi, W.O. Addicott 1970 [Buccinidae]
- Balcis lutzi, W.O. Addicott 1970 [Eulimidae]
- Balcis petrolia, W.O. Addicott 1970 [Eulimidae]
- Buccinum aethiops, Reeve 1847 [Pseudolividae]
- Bulla virescens, Sowerby 1833 [Haminoeidae]
- Calliostoma carsoni, W.O. Addicott 1970 [Trochidae]
- Calyptraea coreyi, W.O. Addicott 1970 [Calyptraeidae]
- Cancellaria (Barkeria) () [Cancellariidae]
- Cancellaria (Coptostoma) (Cossmann 1899) [Cancellariidae]
- Cancellaria (Crawfordina) () [Cancellariidae]
- Cancellaria (Crawfordina) kernensis, W.O. Addicott 1970 [Cancellariidae]
- Cancellaria (Euclia) circumspinosa, W.O. Addicott 1970 [Cancellariidae]
- Cancellaria (Euclia) ocoyana, W.O. Addicott 1970 [Cancellariidae]
- Cancellaria (Narona) birchi, W.O. Addicott 1970 [Cancellariidae]
- Cancellaria andersoni, Clark 1918 [Cancellariidae]
- Cancellaria galei, W.O. Addicott 1970 [Cancellariidae]
- Cancellaria keenae, W.O. Addicott 1970 [Cancellariidae]
- Cerithium mediale, Conrad 1849 [Fasciolariidae]
- Crassispira olcesensis, W.O. Addicott 1970 [Pseudomelaniidae]
- Crepidula bractea, W.O. Addicott 1970 [Calyptraeidae]
- Crucibulum (Dispotaea) papulum, W.O. Addicott 1970 [Calyptraeidae]
- Crypta rostralis, Conrad 1865 [Calyptraeidae]
- Epitonium (Gyroscala) barkerianum, W.O. Addicott 1970 [Epitoniidae]
- Epitonium (Nitidiscala) tedfordi, W.O. Addicott 1970 [Epitoniidae]
- Epitonium pasoense, Anderson and Martin 1914 [Epitoniidae]
- Forreria cancellaroides, Arnold 1909 [Muricidae]
- Forreria emersoni, W.O. Addicott 1970 [Muricidae]
- Fusus geniculus, Conrad 1849 [Fasciolariidae]
- Fusus oregonensis, Conrad 1848 [Siphonaliidae]
- Gibbula (Tumulus) () [Trochidae]
- Gibbula (Tumulus) baileyi, W.O. Addicott 1970 [Trochidae]
- Glyphostoma carinata, W.O. Addicott 1970 [Clathurellidae]
- Kelletia lorata, W.O. Addicott 1970 [Buccinidae]
- Knefastia garcesana, W.O. Addicott 1970 [Costellariidae]
- Launidae, family (Gray 1857) [Littorinidae]
- Mangelia (Agathotoma) (Cossmann 1899) [Mangeliidae]
- Mangelia (Notocytharella) () [Mangeliidae]
- Mangelia (Notocytharella) hartensis, W.O. Addicott 1970 [Mangeliidae]
- Megasurcula howei, Hanna and Hertlein 1938 [Turridae]
- Miopleiona weaveri, Tegland 1933 [Volutidae]
- Mitra (Atrimitra) andersoni, W.O. Addicott 1970 [Mitridae]
- Mitrella (Columbellopsis) alta, W.O. Addicott 1970 [Columbellidae]
- Mitrella anchuela, Keen 1943 [Columbellidae]
- Morula (Morunella) () [Muricidae]
- Morula (Morunella) granti, W.O. Addicott 1970 [Muricidae]
- Nassarius (Phrontis) harrellensis, W.O. Addicott 1970 [Nassariidae]
- Nassarius (Phrontis) posoensis, W.O. Addicott 1970 [Nassariidae]
- Natica (Naticarius) posuncula (Hanna and Hertlein 1938) [Naticidae]
- Natica posuncula, Hanna and Hertlein 1938 [Naticidae]
- Natica teglandi, Hanna and Hertlein 1938 [Naticidae]
- Nerita (Theliostyla) joaquinensis, W.O. Addicott 1970 [Neritidae]
- Niso cottonwoodensis, W.O. Addicott 1970 [Eulimidae]
- Ocenebra clarki, W.O. Addicott 1970 [Muricidae]
- Odostomia (Besla) (Dall and Bartsch 1904) [Pyramidellidae]
- Odostomia (Chrysallida) sequoiana, W.O. Addicott 1970 [Pyramidellidae]
- Odostomia (Evalea) andersoni, W. O. Bartsch and Hertlein 1917 [Pyramidellidae]
- Odostomia (Menestho) (Möller 1842) [Pyramidellidae]
- Odostomia (Menestho) repenningi, W.O. Addicott 1970 [Pyramidellidae]
- Polystira englishi, W.O. Addicott 1970 [Turridae]
- Pyramidella (Syrnola) (Adams 1860) [Pyramidellidae]
- Sinum californicum, Oldroyd 1917 [Naticidae]
- Sulcoretusa israelskyi, W.O. Addicott 1970 [Retusidae]
- Tectibranchia, suborder [unclassified suborder]
- Tectibranchia, order () [Tectibranchia]
- Tegula (Omphalius) (Philippi 1847) [Trochidae]
- Tegula (Omphalius) laevis, W.O. Addicott 1970 [Trochidae]
- Teinostoma (Teinostoma), H. Adams and A. Adams 1853 [Tornidae]
- Terebra (Fusoterebra) () [Terebridae]
- Terebra (Fusoterebra) adelaidana, W.O. Addicott 1970 [Terebridae]
- Terebra (Strioterebrum) stirtoni, W.O. Addicott 1970 [Terebridae]
- Trichotropididae, family (Gray 1850) [Trichotropidae]
- Trichotropis tricarinata, W.O. Addicott 1970 [Capulidae]
- Trophon (Austrotrophon) (Dall 1902) [Muricidae]
- Turbonilla (Chemnitzia) hannai, W.O. Addicott 1970 [Pyramidellidae]
- Turbonilla (Ptycheulimella) (Sacco 1892) [Pyramidellidae]
- Turbonilla (Ptycheulimella) edisonensis, W.O. Addicott 1970 [Pyramidellidae]
- Turbonilla (Pyrgiscus) hormigacuesta, W.O. Addicott 1970 [Pyramidellidae]
- Turbonilla (Pyrgolampros) (Sacco 1892) [Pyramidellidae]
- Turbonilla (Tragula) greenhornensis, W.O. Addicott 1970 [Pyramidellidae]
- Turricula libya, Dall 1919 [Clavatulidae]
- Turritella kernensis, W.O. Addicott 1970 [Turritellidae]
- Turritella moodyi, Applin 1920 [Turritellidae]
- Turritella ocoyana topangensis, Merriam 1941 [Turritellidae]
- Volvulella joaquinensis, W.O. Addicott 1970 [Retusidae]