Herilla illyrica diabasis (A.J. Wagner, 1919)
Herilla illyrica savnikensis H. Nordsieck, 1971
Lampedusa imitatrix (O. Böttger, 1879)
Synprosphyma imperatrix (O. Böttger& P.B. Schmacker, 1894)
Distortiphaedusa imprimata J. Grego & M. Szekeres,2011
Cochlodina inaequalis (A. Schmidt, 1868)
Clausilia inanis A.R.J.B. Bavay& P. Dautzenberg, 1909
Albinaria inauris (O. Böttger, 1896)
Albinaria inauris ietswaarti E. Gittenberger& H.P.M.G. Menkhorst, 1992
Albinaria inauris syedra H. Nordsieck, 2004
Parabalea incarum H.A. Pilsbry, 1926
Parabalea incarum breurei (F.E. Loosjes& F.E. Loosjes, 1984)
Siciliaria incerta (H.C. Küster, 1861)
Albinaria inchoata (O. Böttger, 1889)
Albinaria inchoata klemmi (H. Nordsieck, 1972)
Albinaria inchoata paramythica H. Nordsieck, 1974
Albinaria inchoata regina H. Nordsieck, 1972
Procochlodina incisa (H.C. Küster, 1875)
Luchuphaedusa inclyta (H.A. Pilsbry, 1908)
Synprosphyma incrustata H. Nordsieck, 2016
Index index (A. Mousson, 1863)
Paraformosana indurata (P.M. Heude, 1886)
Bathyptychia infantilis (P.V. Gredler, 1890)
Bulgarica iniucunda (R.A.M. Brandt, 1962)
Bathyptychia inopinata (Hunyadi & Szekeres,2016)
Rillyopsis inopinata (FOSSIL) (F. Traub, 1938 †)
Graciliaria inserta (C. Porro, 1841)
Oospira insignis (A.A. Gould, 1844)
Micropontica interjecta (O.W. Von Rosen, 1914)
Mesophaedusa interlamellaris (E.C. Von Martens, 1876)
Fusulus interruptus (C. Pfeiffer, 1828)
Excussispira inversa (P.M. Heude, 1886)
Selenoptyx inversiluna H.A. Pilsbry, 1908
Cylindrophaedusa ioes (W.H. Benson, 1852)
Tyrannophaedusa iotaptyx (H.A. Pilsbry, 1900)