| Authors(s) | Step, E. |
| Year | 1927 |
| Title | Shell life. 421 pp. Frederick Warne & Co., LTD, London. |
- Abra
- Abra alba
- Abra nitida
- Abra prismatica
- Abra tenuis
- Acanthocardia
- Acanthocardia echinata
- Acanthocardia tuberculata
- Aequipecten
- Aequipecten opercularis
- Alderia
- Alderia modesta
- Anatoma
- Anatoma crispata
- Anomia
- Anomia ephippium
- Anomiidae
- Ansates
- Ansates pellucida
- Arca
- Arca tetragona
- Archaeogastropoda
- Archidoris
- Archidoris pseudoargus
- Arcidae
- Arcoida
- Arctica
- Arctica islandica
- Arcticidae
- Astarte
- Astarte borealis
- Astarte elliptica
- Astarte montagui
- Astarte sulcata
- Astartidae
- Atrina
- Atrina pectinata
- Barnea
- Barnea candida
- Bivalvia
- Cardiidae
- Cerastoderma
- Cerastoderma edule
- Cerastoderma lamarcki
- Chamelea
- Chamelea striatula
- Chlamys
- Chlamys varia
- Clausinella
- Clausinella fasciata
- Cochlodesma
- Cochlodesma praetenue
- Corbula
- Corbula gibba
- Corbulidae
- Crassadoma
- Crassadoma pusio
- Crenella
- Crenella decussata
- Cuspidaria
- Cuspidaria cuspidata
- Cuspidaria obesa
- Cuspidaria rostrata
- Cuspidariidae
- Cuthona
- Cuthona viridis
- Dentaliidae
- Dentalium
- Dentalium entalis
- Dentalium vulgare
- Diplodonta
- Diplodonta rotundata
- Donacidae
- Donax
- Donax vittatus
- Dosinia
- Dosinia exoleta
- Dosinia lupina
- Dotidae
- Doto
- Doto coronata
- Doto fragilis
- Eledone
- Eledone cirrhosa
- Emarginula
- Ensis
- Ensis siliqua
- Epilepton
- Epilepton clarkiae
- Eubranchidae
- Eubranchus
- Eubranchus tricolor
- Favorinidae
- Favorinus
- Favorinus branchialis
- Fissurellidae
- Gari
- Gari costulata
- Gari depressa
- Gari fervensis
- Gari tellinella
- Goniodorididae
- Goniodoris
- Goniodoris nodosa
- Gouldia
- Gouldia minima
- Haliotidae
- Haliotis
- Haliotis tuberculata
- Hemilepton
- Hemilepton nitidum
- Hermaea
- Hermaea bifida
- Heterodonta
- Hiatella
- Hiatella arctica
- Hiatellidae
- Hyalopecten
- Hyalopecten similis
- Irus
- Irus irus
- Janolus
- Janolus cristatus
- Kellia
- Kellia suborbicularis
- Kelliidae
- Laevicardium
- Laevicardium crassum
- Lasaea
- Lasaea rubra
- Lasaeidae
- Limatula
- Limatula gwyni
- Limatula subauriculata
- Limea
- Limea loscombi
- Limidae
- Loliginidae
- Loligo
- Loligo forbesi
- Lucinidae
- Lucinoma
- Lucinoma borealis
- Lutraria
- Lutraria angustior
- Lutraria lutraria
- Lyonsia
- Lyonsia norwegica
- Lyonsiidae
- Macoma
- Macoma balthica
- Mactra
- Mactra stultorum
- Mactridae
- Mercenaria
- Mercenaria mercenaria
- Modiolus
- Modiolus modiolus
- Montacuta
- Montacuta substriata
- Montacutidae
- Musculus costulatus
- Musculus discors
- Mya
- Mya arenaria
- Mya truncata
- Myidae
- Myoida
- Mysella
- Mysella bidentata
- Mysia
- Mysia undata
- Mytilidae
- Mytiloida
- Mytilus edulis
- Nototeredo
- Nototeredo norvegica
- Nucula
- Nucula nucleus
- Nuculana
- Nuculana minuta
- Nuculanidae
- Nuculidae
- Nuculoida
- Octopoda
- Octopodidae
- Octopus
- Octopus vulgaris
- Ostrea
- Ostrea edulis
- Ostreidae
- Ostreoida
- Palliolum
- Palliolum furtivum
- Palliolum striatum
- Palliolum tigerinum
- Pandora
- Pandora albida
- Pandora pinna
- Pandoridae
- Panomya
- Panomya arctica
- Paphia
- Paphia rhomboides
- Parvicardium
- Parvicardium exiguum
- Parvicardium ovale
- Parvicardium scabrum
- Patella
- Patella vulgata
- Patellidae
- Pecten maximus
- Pectinidae
- Periplomatidae
- Petricolidae
- Pharidae
- Pharus
- Pharus legumen
- Pholadidae
- Pholas
- Pholas dactylus
- Protobranchia
- Psammobiidae
- Pseudamussium
- Pseudamussium septemradiatum
- Psiloteredo
- Psiloteredo megotara
- Rossia
- Rossia macrosoma
- Sepia
- Sepia elegans
- Sepia officinalis
- Sepiola
- Sepiola atlantica
- Solecurtidae
- Solecurtus
- Solecurtus scopula
- Solen
- Solenidae
- Sphenia
- Sphenia binghami
- Spisula
- Spisula elliptica
- Spisula solida
- Spisula subtruncata
- Tapes
- Tapes decussata
- Tectura
- Tectura testudinalis
- Tellina
- Tellina donacina
- Tellina fabula
- Tellina pygmaea
- Tellina tenuis
- Tellinidae
- Teredinidae
- Teredo
- Teredo navalis
- Tergipedidae
- Tergipes
- Tergipes tergipes
- Thracia
- Thracia convexa
- Thracia papyracea
- Thraciidae
- Thyasira
- Thyasira croulinensis
- Thyasira equalis
- Thyasira ferruginea
- Thyasira flexuosa
- Thyasira gouldi
- Thyasira sarsi
- Thyasiridae
- Timoclea
- Timoclea ovata
- Todarodes
- Todarodes sagittatus
- Tritonia
- Tritonia hombergi
- Tritoniidae
- Trochidae
- Ungulinidae
- Veneridae
- Veneroida
- Venerupis
- Venerupis senegalensis
- Venus
- Venus casina
- Venus verrucosa
- Xylophaga
- Xylophaga dorsalis
- Xylophagidae
- Zirfaea
- Zirfaea crispata