Heudeia josefinae A.J. Wagner, 1905
Priotrochatella josephinae (C.B. Adams, 1849)
Geotrochatella jourdyi P. Dautzenberg, 1895
Orobophana juddii H.A. Pilsbry & C.M. Cooke,1908
Troschelviana jugulata (F. Poey, 1858)
Helicina juliae W.J. Clench, 1962
Helicina juruana H.F.A. von Ihering, 1905
Pleuropoma kauaiensis H.A. Pilsbry & C.M. Cooke,1908
Trichohelicina klappenbachi W.K. Weyrauch, 1966
Lucidella kobelti A.J. Wagner, 1910
Helicina lacerata H.B. Preston, 1914
Pleuropoma laciniosa (J.W. Mighels, 1845)
Pleuropoma laciniosa pusilla M.C. Neal, 1934
Blandia laidlawiana E. Chitty, 1857
Poeniella lasdlensis W.J. Clench & C.G. Aguayo,1937
Helicina laterculus F.C. Baker, 1914
Helicina laus A.J. Wagner, 1905
Fadyenia layardiana E. Chitty, 1857
Fadyenia leana (C.B. Adams, 1849)
Helicina lembeyana F. Poey, 1854
Helicina leopoldinae A.J. Wagner, 1906
Helicina leptrotopis A.J. Wagner, 1910
Helicina leucozonalis C.M.F. Ancey, 1892
Alcadia lewisi H.A. Pilsbry, 1942
Fadyenia lindsleyana (C.B. Adams, 1849)
Lucidella lineata T. Kira, 1955
Poenia lirata (L. Pfeiffer, 1847)
Helicina lirifera C.M.F. Ancey, 1892
Calidviana littoricola (J. Gundlachin L. Pfeiffer, 1860)
Stoastoma livesayanum E. Chitty, 1857
Fadyenia loweana E. Chitty, 1857
Fadyenia lukisiana E. Chitty, 1857
Helicina lundi H.H. Beck, 1858
Fadyenia macandrewiana (E. Chitty, 1857)
Fadyenia macgillivrayana E. Chitty, 1857