Cardium (Laevicardium) serratum Linnaeus, 1758 accepted as Laevicardium serratum (Linnaeus, 1758) (basis of record)
Cardium (Laevicardium) serratum var. multilineatum Dall & C. T. Simpson, 1901 accepted as Laevicardium pristis (Bory de Saint-Vincent, 1827) (original description)
Cerithiopsis pupa Dall & C. T. Simpson, 1901 accepted as Horologica pupa (Dall & C. T. Simpson, 1901) (original description)
Cocculina portoricensis Dall & C. T. Simpson, 1901 accepted as Coccocrater portoricensis (Dall & C. T. Simpson, 1901) (original description)
Columbella perpicta Dall & C. T. Simpson, 1901 accepted as Cosmioconcha nitens (C. B. Adams, 1850) (original description)
Cuspidaria ornatissima (A. d'Orbigny, 1853) accepted as Cardiomya ornatissima (A. d'Orbigny, 1853) (basis of record)
Diplodonta (Phlyctiderma) notata Dall & C. T. Simpson, 1901 accepted as Diplodonta notata Dall & C. T. Simpson, 1901 (original description)
Dolabrifera ascifera (Rang, 1828) (additional source)
Drillia actinocycla Dall & C. T. Simpson, 1901 accepted as Strombus pugilis Linnaeus, 1758 (original description)
Drillia gundlachi Dall & C. T. Simpson, 1901 accepted as Compsodrillia gundlachi (Dall & C. T. Simpson, 1901) (original description)
Drillia interpleura Dall & C. T. Simpson, 1901 accepted as Buchema interpleura (Dall & C. T. Simpson, 1901) (original description)
Drillia melonesiana Dall & C. T. Simpson, 1901 accepted as Crassispira melonesiana (Dall & C. T. Simpson, 1901) (original description)
Drillia ponciana Dall & C. T. Simpson, 1901 accepted as Crassispira nigrescens (C. B. Adams, 1845) (original description)
Eulima (Leiostraca) patula Dall & C. T. Simpson, 1901 accepted as Eulimacrostoma patulum (Dall & C. T. Simpson, 1901) (original description)
Gaeotis flavolineata Shuttleworth, 1854 (basis of record)
Ischnochiton (Trachydermon) liozonis Dall & C. T. Simpson, 1901 accepted as Lepidochitona (Lepidochitona) liozonis (Dall & C. T. Simpson, 1901) represented as Lepidochitona liozonis (Dall & C. T. Simpson, 1901) (original description)
Mangilia (Cythara) asarca Dall & C. T. Simpson, 1901 accepted as Bactrocythara asarca (Dall & C. T. Simpson, 1901) (original description)
Mangilia (Glyphostoma) aguadillana Dall & C. T. Simpson, 1901 accepted as Lioglyphostoma aguadillanum (Dall & C. T. Simpson, 1901) (original description)
Mangilia aguadillana var. minor Dall & C. T. Simpson, 1901 accepted as Lioglyphostoma aguadillanum (Dall & C. T. Simpson, 1901) (original description)
Mangilia melanitica Dall, 1901 accepted as Nannodiella melanitica (Dall, 1901) (original description)
Megalomastoma croceum var. curtum Dall & C. T. Simpson, 1901 accepted as Neopupina crocea (Gmelin, 1791) (original description)
Melina semiaurita (Linnaeus, 1764) sensu Dall & C. T. Simpson, 1901 accepted as Isognomon bicolor (C. B. Adams, 1845) (basis of record)
Meretrix aresta Dall & C. T. Simpson, 1901 accepted as Agriopoma arestum (Dall & C. T. Simpson, 1901) (original description)
Nassarina metabrunnea Dall & C. T. Simpson, 1901 (original description)
Niso portoricensis Dall & C. T. Simpson, 1901 (original description)
Oliva caribaeensis Dall & C. T. Simpson, 1901 accepted as Oliva scripta scripta Lamarck, 1811 accepted as Oliva scripta Lamarck, 1811 (original description)
Omalaxis exquisita Dall & C. T. Simpson, 1901 accepted as Omalaxis exquisitus Dall & C. T. Simpson, 1901 accepted as Spirolaxis centrifuga (Monterosato, 1890) (original description)
Pecten (Chlamys) mayaguezensis Dall & C. T. Simpson, 1901 accepted as Argopecten lineolaris (Lamarck, 1819) (original description)
Phacoides (Cavilucina) trisulcata var. blandus Dall, 1901 accepted as Cavilinga blanda (Dall, 1901) (original description)
Phacoides (Cavilucina) trisulcatus var. blandus Dall, 1901 accepted as Cavilinga trisulcata (Conrad, 1841) † (original description)
Phos oxyglyptus Dall & C. T. Simpson, 1901 accepted as Antillophos oxyglyptus (Dall & C. T. Simpson, 1901) (original description)
Pleurobranchus lacteus Dall & C. T. Simpson, 1901 (original description)
Pleurodonte (Polydontes) angulata (A. Férussac, 1821) (basis of record)
Rissoa epima Dall & C. T. Simpson, 1901 accepted as Alvinia epima (Dall & C. T. Simpson, 1901) accepted as Manzonia epima (Dall & C. T. Simpson, 1901) (original description)
Rissoa portoricana Dall & C. T. Simpson, 1901 accepted as Finella portoricana (Dall & C. T. Simpson, 1901) (original description)
Saxicavella sagrinata Dall & C. T. Simpson, 1901 (original description)
Scala eulita Dall & C. T. Simpson, 1901 accepted as Epitonium eulita (Dall & C. T. Simpson, 1901) (original description)
Sistrum nodulosum (C. B. Adams, 1845) accepted as Claremontiella nodulosa (C. B. Adams, 1845) (basis of record)
Sphenia antillensis Dall & C. T. Simpson, 1901 accepted as Sphenia fragilis (H. Adams & A. Adams, 1854) (original description)
Tellina persica Dall & C. T. Simpson, 1901 accepted as Phyllodina tenuisculpta (G. B. Sowerby II, 1868) (original description)
Terebra juanica Dall & C. T. Simpson, 1901 accepted as Neoterebra juanica (Dall & C. T. Simpson, 1901) (original description)
Tethys cervina Dall & C. T. Simpson, 1901 accepted as Aplysia cervina (Dall & C. T. Simpson, 1901) (original description)
Tethys parvula (Mörch, 1863) accepted as Aplysia parvula Mörch, 1863 (basis of record)
Tritonidea Swainson, 1840 accepted as Pollia J. E. Gray, 1834 (basis of record)
Tritonidea tincta var. bermudensis Dall, 1901 accepted as Gemophos tinctus (Conrad, 1846) (original description)
Turbonilla insularis Dall & C. T. Simpson, 1901 (original description)
Turbonilla portoricana Dall & C. T. Simpson, 1901 (original description)
Vesicomyidae Dall & C. T. Simpson, 1901 (original description)

Puerto Rican Exclusive Economic Zone for Cerithiopsis pupa Dall & C. T. Simpson, 1901 
Puerto Rican Exclusive Economic Zone for Ischnochiton (Trachydermon) liozonis Dall & C. T. Simpson, 1901 
Puerto Rican Exclusive Economic Zone for Mangilia melanitica Dall, 1901 
Puerto Rican Exclusive Economic Zone for Terebra juanica Dall & C. T. Simpson, 1901