Eurhomalea lenticularis (W.J. Broderip & Sowerby,1835)
Meretrix lentiginosa (J.H. Chemnitz, 1795)
Circe lentiginosa O.A.L. Mörch, 1853
Globivenus lepidoglypta (W.H. Dall, 1902)
Tivela lessonii (G.P. Deshayes, 1830)
Dosinia levissima E. Fischer-Piette& D. Delmas, 1967
Timoclea levukensis (E.A. Smith, 1885)
Samarangia lewinsohni H.K. Mienis, 2011
Chionopsis lilacina (Carpenter, 1864)
Leukoma lima (G.B. II Sowerby, 1852)
Hyphantosoma limatulum (G.B. II Sowerby, 1851)
Tivela lineata (G.B. II Sowerby, 1851)
Pitar lineolatus (G.B. II Sowerby, 1854)
Petricola linguafelis (P.P. Carpenter, 1857)
Cyprimeria linnaei (FOSSIL) Renard, 1994 †
Dosinia liogona (FOSSIL) W.H. Dall, 1903 †
Timoclea lionota (E.A. Smith, 1885)
Paphia lirata (R.A. Philippi, 1848)
Circe lirata (A. Römer, 1869)
Paphia lischkei (FOSSIL) E. Fischer-Piette& Metivier, 1971 †
Periglypta listeri (J.E. Gray, 1838)
Globivenus listeroides (E. Fischer-Piette& A.M. Testud, 1967)
Tapes literatus (C. Linnaeus, 1758)
Tapes literatus guttulatus (P.F. Röding, 1798)
Petricola lithophaga (A. Retzius, 1788)
Dosinia lochi J.M. Healy & K.L. Lamprell,1992
Nutricola lordi (W. Baird, 1863)
Dosinia lucinalis (J.B.P.A. Lamarck, 1818)
Dosinia luedersii A. Römer, 1862
Chionella lunularia (FOSSIL) (G.P. Deshayes, 1825 †)
Cyclina lunulata (FOSSIL) J. Makiyama, 1926 †
Katelysia lunulata (FOSSIL) J. Marwick, 1931 †
Cockburnia lunulifera (FOSSIL) (R.O. Wilckens, 1911 †)
Hysteroconcha lupanaria (R.P. Lesson, 1831)
Dosinia lupina (C. Linnaeus, 1758)