Colus jeffreysianus (P. Fischer, 1868)
Colus jeffreysianus howsei (W.B. Marshall, 1902)
Colus jeffreysianus minor P. Fischer, 1868
Colus jeffreysianus torrus (É.A.A. Locard, 1897)
Buccinum jeffreysii E.A. Smith, 1875
Pisania jenningsi (W.O. Cernohorsky, 1966)
Retifusus jessoensis (L. von Schrenck, 1863)
Chauvetia joani P.G. Oliver & E. Rolán,2008
Plicifusus johanseni W.H. Dall, 1919
Neptunea johnsoni W.H. Dall, 1919
Siphonalia johnsoni (FOSSIL) H.G. Richards, 1947 †
Latisipho jordani (W.H. Dall, 1913)
Euthria josepedroi E. Rolán & A. Monteiro,2007
Hesperisternia jugosa (C.B. Adams, 1852)
Clea jullieni (G.P. Deshayes, 1876)
Metula juncea (FOSSIL) (D.C. Solander, 1766 †)
Metula juncea curryi L. Dolin & Renard, 1980
Buccinum kadiakense W.H. Dall, 1907
Mohnia kaicherae E.J. Petuch, 1987
Pararetifusus kantori A. Kosyan, 2006
Jerrybuccinum kantori K. Fraussen, J. Sellanes& P. Stahlschmidt, 2014
Hesperisternia karinae (G.W. Nowell-Usticke,1959)
Buccinum kashimanum T.A. Okutani, 1964
Siphonalia kawaensis J.A. Bartrum 1919
Ancistrolepis kawamurai T. Habe & K. Itô, 1972
Buccinum kawamurai T. Habe & K. Itô, 1965
Kelletia kelletii (E. Forbes, 1850)
Buccipagoda kengrahami (W.F. Ponder, 1982)
Beringius kennicottii (W.H. Dall, 1871)
Cominella kereruensis (FOSSIL) C.R. Laws, 1932 †
Siphonalia kikaigashimana Y. Hirase, 1908
Afrocominella kilburni Quicyle Berge
Metula kilburni M. Parth, 1994
Tasmeuthria kingicola (R. Tate & W.L. May,1900)
Buccinum kinukatsugai T. Habe & K. Itô, 1968