Cominella intermedia (FOSSIL) (H.H. Suter, 1917 †)
Euthria intermedia (FOSSIL) (O.G. Michelotti, 1847 †)
Neptunea intersculpta (G.B. III Sowerby, 1899)
Bailya intricata (W.H. Dall, 1884)
Chlanidota invenusta M.G. Harasewych& Y.I. Kantor, 1999
Neptunea inversa (FOSSIL) F.W. Harmer, 1918 †
Prosipho iodes P.G. Oliver & G.B. Picken,1984
Prodotia iostoma (J.E. Gray, 1834)
Prodotia iostoma billeheusti S.M. Souverbie
Kelletia iravadica (FOSSIL) E.W. Vredenburg, 1921 †
Buccinum isaotakii T. Kira, 1959
Siphonalia ishikariana (FOSSIL) K. Oyama & A. Mizuno,1958 †
Trominina ishikariensis (FOSSIL) (I. Hayasaka & Matsui,1951 †)
Clinopegma isikawai R. Tiba, 1974
Buccinum islandicum (L.C. Kiener, 1840)
Colus islandicus (N.P. Mohr, 1786)
Neptunea ithia (W.H. Dall, 1891)
Fusipagoda itohabei A. Kosyan & Y.I. Kantor,2015
Calliloncha iturupi V.J. Lus, 1983
Retifusus iturupus (A.N. Golikov& B.I. Sirenko, 1998)
Hesperisternia itzamnai G.T. Watters, 2009
Lussivolutopsius ivanovi Y.I. Kantor, 1983
Mohnia iwateana R. Tiba, 1981
Neptunea jagudinae V.N. Goryachev& Y.I. Kantor, 1983
Steye janasaraiarum M.J. Faber, 2004
Cantharus janelli (L.C. Kiener, 1835)
Engina janowskyi J. Coltro, F.H.A. Costa& R. dos Santos Gomes, 2005
Pareuthria janseni (H. Strebel, 1905)
Euthria japonica (T. Shuto, 1978)
Retimohnia japonica (W.H. Dall, 1913)
Chauvetia japonica (A. Adams, 1860)
Searlesia japonica (FOSSIL) Yokoyama, 1926 †
Trominina japonica (FOSSIL) (H. Takeda, 1953 †)
Buccinum japonicum A. Adams, 1861
Euthria javanica K. Fraussen & H. Dekker,2002