Leiocithara longispira (E.A. Smith, 1879)
Neoguraleus loochooensis (FOSSIL) F.S. MacNeil, 1960 †
Mangelia loraeformis W.H. Dall, 1927
Eucithara lota (A.A. Gould, 1860)
Mangelia louisa W.H. Dall, 1919
Mangelia louisensis G.B. III Sowerby, 1894
Paraguraleus lucidus C.F. Laseron, 1954
Mangelia luctuosa D'Orbigny, 1845
Mangelia luellingensis (FOSSIL) Wienrich & Janssen,2007 †
Mangelia lutea A.A. Gould, 1860
Oenopota lutkeana A. Krause, 1885
Neoguraleus lyallensis (R. Murdoch, 1905)
Neoguraleus lyallensis tenebrosum (A.W.B. Powell, 1926)
Eucithara lyra (L.A. Reeve, 1846)
Gingicithara lyrica (L.A. Reeve, 1846)
Oenopota maclaini (W.H. Dall, 1902)
Benthomangelia macra (R.B. Watson, 1881)
Leiocithara macrocephala (K.H.J. Thiele, 1925)
Eucithara macteola R.N. Kilburn, 1992
Mangelia maculata (L.A. Reeve, 1846)
Ithycythara maera (FOSSIL) W.P. Woodring, 1928 †
Ithycythara maera rata (FOSSIL) A.A. Olsson & A. Harbison,1953 †
Oenopota magellanica (E.C. Von Martens, 1881)
Pyrgocythara mairelae R. Fernández-Garcés& E. Rolán, 2010
Fusiguraleus major (FOSSIL) (A.W.B. Powell, 1942 †)
Eucithara makadiensis R.N. Kilburn & H. Dekker,2008
Antiguraleus makaraensis (FOSSIL) P. Vella, 1954 †
Pseudorhaphitoma mamillata (E.A. Smith, 1888)
Fusiguraleus mancus (FOSSIL) (A.W.B. Powell, 1942 †)
Mangelia mangeri H.B. Preston, 1905
Neoguraleus manukauensis A.W.B. Powell, 1942
Mangelia maoica (FOSSIL) C.J. Maury, 1917 †
Gingicithara maraisi R.N. Kilburn, 1992
Kyllinia marchadi (FOSSIL) (J. Knudsen, 1956 †)
Eucithara marerosa R.N. Kilburn, 1992