Melanella lunata H.A. Pilsbry, 1918
Fusceulima lutea (W. Turton, 1832)
Melanella lutea R. Garcia del Castillo,2000
Batheulima lutescens L.R.L. Simone, 2002
Paraglauconia lyrica (FOSSIL) C.J. Maury, 1936 †
Campylorhaphion machaeropsis (P. Dautzenberg& H. Fischer, 1896)
Eulimostraca macleani A. Warén, 1992
Vitreolina macra (P. Bartsch, 1917)
Bathycrinicola macrapex P. Bouchet & A. Warén,1986
Curveulima macrophtalmica (A. Warén, 1972)
Annulobalcis maculatus P.Y. Dgebuadze, A.E. Fedosov& Y.I. Kantor, 2012
Bulimeulima magna P. Bouchet & A. Warén,1986
Melanella magnifica (P. Bartsch, 1915)
Melanella magnoliana (FOSSIL) Gardner & T.H. Aldrich,1919 †
Eulima major G.B. I Sowerby, 1834
Fuscapex major (P. Bouchet & A. Warén,1986)
Hemiaclis major P. Bouchet & A. Warén,1986
Polygireulima makista (FOSSIL) Gardner, 1947 †
Melanella mamilla (W.L. May, 1916)
Mucronalia mammillata W.H. Dall, 1927
Fusceulima mangonuica (A.W.B. Powell, 1940)
Curveulima manifesta C.F. Laseron, 1955
Eulima manzoniana A. Issel, 1869
Melanella maoria (A.W.B. Powell, 1940)
Melanella maracuya J. Espinosa, J.A. Ortea& J. Magaña, 2001
Vitreolina maracuya J. Espinosa, J.A. Ortea& J. Magaña, 2001
Hypermastus mareticola A. Warén & A. Norris,1994
Scalenostoma mariei P. Fischer, 1886
Niso marmorata (G.B. I Sowerby, 1834)
Microstilifer marsanensis (FOSSIL) P. Lozouet, 1998 †
Annulobalcis marshalli A. Warén, 1981
Curveulima marshalli P. Bouchet & A. Warén,1986
Melanella martinii (A. Adamsin G.B. II Sowerby, 1854)
Melanella martynjordani (H.K. Jordan, 1895)
Melanella marviva J. Espinosa, J.A. Ortea& J. Magaña, 2006