Buccinum steveni Krynicki, 1837 accepted as Bela nebula (Montagu, 1803) (source of synonymy)
Cancellaria arctica Middendorff, 1849 accepted as Neoiphinoe arctica (Middendorff, 1849) (original description)
Crepidula grandis Middendorff, 1849 accepted as Grandicrepidula grandis (Middendorff, 1849) (original description)
Crepidula sitchana Middendorff, 1849 (original description)
Lacuna glacialis Møller, 1842 accepted as Lacuna crassior (Montagu, 1803) (additional source)
Littorina kurila Middendorff, 1848 accepted as Littorina sitkana R. A. Philippi, 1846 (additional source)
Littorina kurila var. fasciatus Middendorff, 1851 accepted as Littorina sitkana R. A. Philippi, 1846 (original description)
Littorina kurila var. fuscus Middendorff, 1851 accepted as Littorina sitkana R. A. Philippi, 1846 (original description)
Littorina kurila var. griseolacteus Middendorff, 1851 accepted as Littorina sitkana R. A. Philippi, 1846 (original description)
Littorina kurila var. zonatus Middendorff, 1851 accepted as Littorina sitkana R. A. Philippi, 1846 (original description)
Littorina littorea var. fuscofasciatus Middendorff, 1849 accepted as Littorina littorea (Linnaeus, 1758) (original description)
Littorina littorea var. pallidefasciatus Middendorff, 1849 accepted as Littorina littorea (Linnaeus, 1758) (original description)
Littorina obtusata f. elatiorangulata Middendorff, 1849 accepted as Littorina obtusata (Linnaeus, 1758) (original description)
Littorina obtusata f. globosa Middendorff, 1849 accepted as Littorina obtusata (Linnaeus, 1758) (original description)
Littorina rudis f. elatior Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina sitchana var. castaneus Middendorff, 1849 accepted as Littorina sitkana R. A. Philippi, 1846 (original description)
Littorina sitchana var. zonatus Middendorff, 1849 accepted as Littorina sitkana R. A. Philippi, 1846 (original description)
Littorina tenebrosa f. elatior Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa f. elatiorcrassa Middendorff, 1849 accepted as Littorina obtusata (Linnaeus, 1758) (original description)
Littorina tenebrosa var. costulata Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa var. densecostulata Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa var. grisolacteus Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa var. obtusataea Middendorff, 1849 accepted as Littorina obtusata (Linnaeus, 1758) (original description)
Littorina tenebrosa var. rubidus Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa var. tessellatus Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Littorina tenebrosa var. zonatus Middendorff, 1849 accepted as Littorina saxatilis (Olivi, 1792) (original description)
Murex erinaceus Linnaeus, 1758 accepted as Ocenebra erinaceus (Linnaeus, 1758) (additional source)
Natica clausa var. elatior Middendorff, 1849 accepted as Cryptonatica affinis (Gmelin, 1791) (original description)
Natica clausa var. normalis Middendorff, 1849 accepted as Cryptonatica affinis (Gmelin, 1791) (original description)
Natica helicoides G. Johnston, 1835 accepted as Amauropsis islandica (Gmelin, 1791) (additional source)
Onychoteuthis kamtschatica Middendorff, 1849 accepted as Gonatus kamtschaticus (Middendorf, 1849) (original description)
Paludinella cingulata Middendorff, 1849 accepted as Onoba cingulata (Middendorff, 1849) (original description)
Patella (Acmaea) cassis (Rathke, 1833) accepted as Lottia pelta (Rathke, 1833) (basis of record)
Patella (Acmaea) persona (Rathke, 1833) accepted as Lottia persona (Rathke, 1833) (basis of record)
Patella (Acmaea) personoides Middendorff, 1849 (original description)
Patella (Acmaea) testudinalis (O. F. Müller, 1776) accepted as Testudinalia testudinalis (O. F. Müller, 1776) (basis of record)
Pleurotoma simplex Middendorff, 1849 accepted as Obesotoma simplex (Middendorf, 1849) (original description)
Purpura decemcostata Middendorff, 1849 accepted as Nucella canaliculata (Duclos, 1832) (original description)
Purpura lapillus var. anomala Middendorff, 1849 accepted as Nucella lapillus (Linnaeus, 1758) (original description)
Rissoa cylindracea Krynicki, 1837 (basis of record)
Rissoa violaestoma Krynicki, 1837 accepted as Rissoa splendida Eichwald, 1830 (source of synonymy)
Trichotropis insignis Middendorff, 1848 accepted as Ariadnaria insignis (Middendorff, 1848) (original description)
Tritonium (Buccinum) tenebrosum (Hancock, 1846) accepted as Buccinum cyaneum Bruguière, 1789 (basis of record)
Tritonium (Buccinum) tenue (Gray, 1839) accepted as Buccinum scalariforme Møller, 1842 (basis of record)
Tritonium (Buccinum) tenue f. elatior Middendorff, 1849 accepted as Buccinum scalariforme Møller, 1842 (original description)
Tritonium (Buccinum) undatum var. pelagica (W. King, 1846) accepted as Buccinum undatum Linnaeus, 1758 (basis of record)
Tritonium (Fusus) antiquum (Linnaeus, 1758) accepted as Neptunea antiqua (Linnaeus, 1758) (basis of record)
Tritonium (Fusus) antiquum var. communis Middendorff, 1849 accepted as Neptunea communis communis (Middendorff, 1849) represented as Neptunea communis (Middendorff, 1849) (original description)
Tritonium (Fusus) behringii Middendorff, 1848 accepted as Beringius behringii (Middendorff, 1848) (basis of record)
Tritonium (Fusus) despectum (Linnaeus, 1758) accepted as Neptunea despecta (Linnaeus, 1758) (basis of record)
Tritonium (Fusus) despectum var. antiquata Middendorff, 1849 accepted as Neptunea despecta (Linnaeus, 1758) (original description)
Tritonium (Fusus) despectum var. carinata Middendorff, 1849 accepted as Neptunea despecta (Linnaeus, 1758) (original description)
Tritonium (Fusus) despectum var. varicoso-carinata Middendorff, 1849 accepted as Neptunea despecta (Linnaeus, 1758) (original description)
Tritonium (Fusus) islandicum (Mohr, 1786) accepted as Colus islandicus (Mohr, 1786) (basis of record)
Tritonium (Fusus) islandicum var. striata Middendorff, 1849 accepted as Colus gracilis (da Costa, 1778) (original description)
Tritonium (Fusus) islandicum var. sulcata Middendorff, 1849 accepted as Colus islandicus (Mohr, 1786) (original description)
Tritonium (Fusus) schantaricum Middendorff, 1849 accepted as Aulacofusus brevicauda (Deshayes, 1832) (original description)
Tritonium antiquum var. angulato-carinata Middendorff, 1849 accepted as Neptunea borealis (R. A. Philippi, 1850) (original description)
Tritonium antiquum var. communis Middendorff, 1849 accepted as Neptunea communis (Middendorff, 1849) (original description)
Tritonium antiquum var. originalis Middendorff, 1849 accepted as Neptunea antiqua (Linnaeus, 1758) (original description)
Tritonium clathratum f. elatior Middendorff, 1849 accepted as Boreotrophon clathratus (Linnaeus, 1767) (original description)
Tritonium clathratum f. normalis Middendorff, 1849 accepted as Boreotrophon clathratus (Linnaeus, 1767) (original description)
Tritonium clathratum f. ventricosa Middendorff, 1849 accepted as Boreotrophon clathratus (Linnaeus, 1767) (original description)
Trochus cinerarius Linnaeus, 1758 accepted as Steromphala cineraria (Linnaeus, 1758) (basis of record)
Trochus modestus Middendorff, 1849 (original description)
Trochus schantaricus Middendorff, 1849 accepted as Margarites schantaricus (Middendorff, 1849) (original description)
Turritella eschrichtii Middendorff, 1849 accepted as Neostylidium eschrichtii (Middendorff, 1849) (original description)

Bering Sea for Crepidula grandis Middendorff, 1849 

 Taxonomic remark

 for Onoba cingulata (Middendorff, 1849)

Originally described as Paludinella c., see Middendorff, 1849: 376 [details]