Balcis kaiparaensis (FOSSIL) C.R. Laws 1939 †
Melanella kanaka H.A. Pilsbry, 1917
Melanella karolinae W. Engl, 2006
Melanella karsteni (FOSSIL) Anderson, 1928 †
Hemiaclis katrinae W. Engl, 2006
Eulima kawamurai T. Habe, 1961
Melanella kawamurai (J.T. Kuroda & T. Habe,1950)
Stilifer kawamurai (T. Habe, 1976)
Crinolamia kermadecensis (J. Knudsen, 1964)
Melanella kermadecensis W.R.B. Oliver, 1915
Sticteulima kermadecensis (W.R.B. Oliver, 1915)
Hypermastus kilburni A. Warén, 1991
Leiostraca kilcundae (J.H. Gatliff& C.J. Gabriel, 1914)
Vitreolina knudseni P. Bouchet & A. Warén,1986
Eulima kochi (FOSSIL) C.G. Semper, 1861 †
Eulima koeneni Š. Brusina, 1893
Curveulima komai (T. Habe, 1950)
Curveulima kowiensis (W.H. Turton, 1932)
Peasistilifer koyamai (T. Habe, 1976)
Balcis krishna (FOSSIL) (M. Yokoyama, 1922 †)
Eulima labiata A. Adams, 1861
Eulima labiosa G.B. I Sowerby, 1834
Eulima labrosa R.B. Newton, 1891
Eulima lacca J.T. Kuroda & T. Habe,1971
Stilapex lactarius T. Iredale, 1925
Eulima lactea A. Adams, 1854
Melanella lactea (FOSSIL) J.P.S. Grateloup, 1838 †
Bessomia lactea (J.T. Kuroda, 1949)
Eulima laevigata (FOSSIL) Lea, 1843 †
Vitreobalcis laevis A. Warén, 1980
Eulima lamberti (FOSSIL) A.E.M. Cossmann, 1882 †
Oceanida lampra (J.C. Melvill, 1918)
Leiostraca lanceata (A. Adams, 1861)
Rectilabrum lanceolatum P. Bouchet & A. Warén,1986
Eulitoma langfordi (W.H. Dall, 1925)