Xenopoma humboldtianum (L. Pfeiffer, 1867)
Tropidophora humbug R.J. Griffiths& D.G. Herbert, 2013
Colobostylus humphreysiana (L. Pfeiffer, 1846)
Colonella hydii (C.D. Weinland)
Pomatias hyrcanum (E.C. Von Martens, 1874)
Xenopoma hystrix (B.H. Wrightin L. Pfeiffer, 1862)
Chondropoma ignea (L.A. Reeve, 1838)
Adamsiella ignilabris (C.B. Adams, 1849)
Troschelvindex illustris F. Poey
Torrella immersa (J. Gundlachin L. Pfeiffer, 1857)
Torrella immersa camaronensis C. de la Torre & P. Bartsch,1941
Chondrothyretes impressa C. de la Torre & P. Bartsch,1938
Chondrothyretes impressa gigantea (C. de la Torre& P. Bartsch, 1938)
Chondrothyretes impressa rosariensis (C. de la Torre& P. Bartsch, 1938)
Annularisca incerta C. de la Torre & P. Bartsch,1941
Chondrothyretes incrassata (L. Pfeiffer, 1862)
Chondrothyretes incrassata aurantiaca (C. de la Torre& P. Bartsch, 1938)
Chondrothyretes incrassata subincrassata (C. de la Torre& P. Bartsch, 1938)
Troschelvindex inculta (F. Poey, 1851)
Pomatias indicum G.P. Deshayes, 1832
Annularia indivisa (D.A. Welch, 1929)
Annularia inquisita (H.A. Pilsbry, 1929)
Opisthosiphon insulanum C. de la Torre & P. Bartsch,1941
Ligatella insularis (L. Pfeiffer, 1851)
Annularisca intercisa C. de la Torre & P. Bartsch,1941
Colobostylus interruptus (J.B.P.A. Lamarck, 1822)
Annularisca interstitialis (J. Gundlachin L. Pfeiffer, 1859)
Chondropoma irradians (R.J. Shuttleworthin L. Pfeiffer, 1852)
Adamsiella irrorata C.P. Gloyne, 1875
Rhytidopoma isabelae C.G. Aguayo & M.L. Jaume,1953
Parachondria isabellina G.T. Watters, 2016
Tropidophora ivogoensis E. Fischer-Piette, Ch.P. Blanc& D. Vukadinovic, 1974
Rhytidopoma jacmelense P. Bartsch, 1946
Rhytidothyra jacobsoni (L.O. Alcalde, 1948)
Annularia jamaguensis C. de la Torre