Afer lansbergisi A. Delsaerdt, 1993
Ptychosalpinx laqueata (T.A. Conrad, 1832)
Austrofusus latecostatus (FOSSIL) (H.H. Suter, 1917 †)
Colus latericeus (H.P.C. Møller, 1842)
Retifusus latericeus (H.P.C. Møller, 1842)
Retifusus laticingulatus A.N. Golikov & V.V. Gulbin,1977
Helicofusus laticordatus (W.H. Dall, 1907)
Neptunea laticostata A.N. Golikov, 1962
Engina latior (FOSSIL) B.M. Landau& G.J. Vermeij, 2012 †
Retifusus latiplicatus A. Kosyan & Y.I. Kantor,2014
Japelion latus (W.H. Dall, 1918)
Cantharus latus (FOSSIL) J. de C. Sowerby, 1813 †
Engina lauta (L.A. Reeve, 1846)
Eocantharus lavatus (FOSSIL) (J. de C. Sowerby,1823 †)
Engina layardi J.C. Melvill, 1895
Chauvetia lefebvrii (C. Maravigna, 1840)
Corneobuccinum lepidum (W.H. Dall, 1918)
Colus leptalens (A.E. Verrill, 1884)
Crassicantharus letourneuxi K. Fraussen& P. Stahlschmidt, 2015
Buccinum leucodomum C.E. Lischke, 1872
Buccinum leucostoma C.E. Lischke, 1872
Cantharus leucotaeniatus S. Kosuge, 1985
Enginella leucozona (R.A. Philippi, 1844)
Enginella leucozona obscura (F.J. Cantraine, 1835)
Engina leucozonia A.H. Verrill, 1950
Plicifusus levis R. Tiba, 1980
Ptychosalpinx lienosa (FOSSIL) (T.A. Conrad, 1843 †)
Siphonalia ligata A. Adams, 1863
Paracominia lignaria (FOSSIL) (A.W.B. Powell& J.A. Bartrum, 1929 †)
Engina lignea G.T. Watters & K. Fraussen,2015
Lussivolutopsius limatus (W.H. Dall, 1907)
Volutharpa limnaea A. Adams, 1860
Buccinum limnaenum A. Adams, 1860
Buccinum limnoideum W.H. Dall, 1907
Ptychosalpinx lindae (FOSSIL) E.J. Petuch, 1988 †