Carychium jardineanum (E. Chitty, 1853)
Carychium javanum O.F. von Möllendorff,1897
Detracia joseana J.P.E. Morrison, 1946
Pedipes jouani R.P. Montrouzier, 1862
Pedipes jouani philippinica O.F. von Möllendorff,1893
Cassidula kraussi (H.C. Küster, 1844)
Zospeum kusceri A.J. Wagner, 1912
Cassidula labio O.F. von Möllendorff,1887
Cassidula labrella (G.P. Deshayes, 1830)
Marinula labrosa (FOSSIL) A.E.M. Cossmann, 1895 †
Ovatella laevigata N.F. Sohl, 1963
Melampus laevus (O.F. Müller, 1774)
Ellobium lamarcki (FOSSIL) (G.P. Deshayes, 1863 †)
Marinula lapparenti (FOSSIL) J.B.C.P. de Raincourt,1884 †
Auriculinella latidudo A.C. dos Santos Coelho& H.R. Matthews, 1970
Zospeum lautum (G.R. von Frauenfeld,1854)
Allochroa layardi (H. Adams & A. Adams,1855)
Pythia lecithostoma L.A. Reeve, 1854
Carychium lederi O. Böttger, 1880
Pythia lekithostoma L.A. Reeve, 1832
Blauneria leonardi J.C.H. Crosse, 1872
Pedipes leoniae C.M.F. Ancey, 1887
Melampus liberianus H. Adams & A. Adams, 1854
Pedipes liratus W.G. Binney, 1860
Laemodonta livida I. Perugia, 2010
Melampus lividus (G.P. Deshayes, 1830)
Microtralia lucida (W.H. Pease, 1869)
Cassidula lutescens L. Pfeiffer, 1856
Melampus luteus (J.R.C. Quoy& J.P. Gaimard, 1832)
Laemodonta madagascariensis L. Bozzetti, 2007
Marinula maindroni C. Vélain, 1877
Tralia malanastoma A. Garrett, 1873
Leuconopsis manningi A.M. de F. Martins, 1996
Marinula marceauxi (FOSSIL) G.P. Deshayes, 1863 †
Carychium mariae M. Paulucci, 1878