Helicarion hakonensis H.A. Pilsbry & Y. Hirase,1905
Nipponochlamys hakusanus (H.A. Pilsbry & Y. Hirase,1907)
Helicarion helenae H.H. Godwin-Austen, 1883
Helicarion helenkingae P.H. Scott, 1995
Dendrotrochus helicinoides (J.B. Hombron& C.H. Jacquinot, 1841)
Dendrotrochus helicinoides cleryi (C.A. Récluz, 1851)
Geotrochus heraclea (E.A. Smith, 1895)
Hunsteinia hercules (C. Hedley, 1891)
Howearion hilli (J.C. Cox, 1873)
Helicarion hiraseana H.A. Pilsbry, 1901
Parakaliella hizenensis (H.A. Pilsbry, 1902)
Nipponochlamys hokkaidonis (H.A. Pilsbry & Y. Hirase,1905)
Epiglypta howinsulae (J.C. Cox, 1873)
Irenella hoyti (A. Garrett, 1872)
Helicarion huberi Thach, 2016
Trochochlamys humiliconus (H.A. Pilsbry & Y. Hirase,1904)
Helicarion hyaleus F.S. Bock, 1881
Hemiglypta iloilana M. Smith, 1932
Helicarion imitatrix E.R. Sykes, 1900
Lutilodix imitratrix (E.R. Sykes, 1900)
Helicarion imperator (A.A. Gould, 1859)
Caldwellia imperfecta unknown
Harmogenanina implicata (G. Nevill, 1870)
Parakaliella incerta (A. Adams, 1868)
Helicarion infans (L. Pfeiffer, 1854)
Sesara infredens A.A. Gould
Sesara infrendens (A.A. Gould, 1844)
Helicarion insculpta L. Pfeiffer, 1846
Pachystyla inversicolor (A.E.J. Férussac, 1821)
Pachystyla inversicolor mauritianella (P.M.A. Morelet)
Helicarion iridis I. Hyman, 2007
Geotrochus isabellensis (S.M. Souverbie, 1863)
Nipponochlamys izushichitojimana (H.A. Pilsbry & Y. Hirase,1904)
Helicarion kagaensis H.A. Pilsbry & Y. Hirase,1902
Ovachlamys kandai M. Azuma, 1978