1. Subgenus Helix (Atlasica) Pallary, 1917 accepted as Loxana Pallary, 1899 (unaccepted > junior subjective synonym)
2. Species Helix afra Gmelin, 1791 accepted as Pedipes pedipes (Bruguière, 1789) (synonym)
3. Species Helix ambigua Linnaeus, 1758 accepted as Fossarus ambiguus (Linnaeus, 1758) (original combination)
4. Species Helix balthica Linnaeus, 1758 accepted as Ampullaceana balthica (Linnaeus, 1758) (unaccepted > superseded combination, basionym)
5. Species Helix canalis (Montagu, 1803) accepted as Lacuna vincta (Montagu, 1803) (unaccepted > junior subjective synonym)
6. Species Helix coccinea Gmelin, 1791 accepted as Littoraria coccinea (Gmelin, 1791) (original combination)
7. Species Helix corallina Chemnitz, 1795 accepted as Scalenostoma subulatum (Broderip, 1832) (unavailable name [published in a work that is not considered binominal])
8. Species Helix coriacea Pallas, 1788 accepted as Velutina coriacea (Pallas, 1788) (original combination)
9. Species Helix crenata Gmelin, 1791 accepted as Amphibola crenata (Gmelin, 1791) (original combination)
10. Species Helix decussata Montagu, 1803 accepted as Zebinella decussata (Montagu, 1803) (original combination)
11. Species Helix depressa Montagu, 1803 accepted as Skeneopsis planorbis (O. Fabricius, 1780) (synonym)
12. Species Helix eburnea Megerle von Mühlfeld, 1824 accepted as Melanella eburnea (Megerle von Mühlfeld, 1824) (original combination)
13. Species Helix fasciata J. Adams, 1800 accepted as Lacuna parva (da Costa, 1778) (synonym)
14. Species Helix flavocincta Megerle von Mühlfeld, 1824 accepted as Eulima glabra (da Costa, 1778) (unaccepted > junior subjective synonym)
15. Species Helix fulgidus J. Adams, 1797 accepted as Eatonina fulgida (J. Adams, 1797)
16. Species Helix glabrata Megerle von Mühlfeld, 1824 accepted as Pisinna glabrata (Megerle von Mühlfeld, 1824)
17. Species Helix haliotoidea Linnaeus, 1758 accepted as Sinum haliotoideum (Linnaeus, 1758) (original combination)
18. Species Helix hylephila A. d'Orbigny, 1835 accepted as Streptaxis hylephilus (A. d'Orbigny, 1835) (unaccepted > superseded combination, basionym)
19. Species Helix innominata Gray, 1825 accepted as Caseolus innominatus (J. E. Gray, 1825) (unaccepted > superseded combination)
20. Species Helix janthina Forsskål, 1775 accepted as Janthina janthina (Linnaeus, 1758) (junior synonym and homonym)
21. Species Helix janthina Linnaeus, 1758 accepted as Janthina janthina (Linnaeus, 1758) (original combination)
22. Species Helix johnii Holten, 1802 accepted as Recluzia johnii (Holten, 1802) (superseded combination)
23. Species Helix kompsa Mabille, 1883 accepted as Canaridiscus kompsus (Mabille, 1883) (unaccepted > superseded combination, basionym)
24. Species Helix labiosa Montagu, 1803 accepted as Rissoa membranacea (J. Adams, 1800) (synonym)
25. Species Helix lacuna Montagu, 1803 accepted as Lacuna parva (da Costa, 1778) (synonym)
26. Species Helix littorina Delle Chiaje, 1828 accepted as Paludinella littorina (Delle Chiaje, 1828) accepted as Melarhaphe neritoides (Linnaeus, 1758) (original combination)
27. Species Helix margarita Montagu, 1808 accepted as Margarites helicinus (Phipps, 1774) (synonym)
28. Species Helix mespillum Megerle von Mühlfeld, 1824 accepted as Echinolittorina mespillum (Megerle von Mühlfeld, 1824) (basionym)
29. Species Helix mingrelica P. Hesse, 1918 accepted as Jasonella mingrelica (P. Hesse, 1918) (unaccepted > superseded combination, original combination)
30. Species Helix neritoidea Linnaeus, 1758 accepted as Sinum neritoideum (Linnaeus, 1758) (original combination)
31. Species Helix neritoidea Gmelin, 1791 accepted as Lamellaria perspicua (Linnaeus, 1758) accepted as Marsenia perspicua (Linnaeus, 1758) (dubious synonym)
32. Species Helix nucleus Gmelin, 1791 accepted as Cassidula nucleus (Gmelin, 1791) (original combination)
33. Species Helix nutans Megerle von Mühlfeld, 1824 accepted as Vitreobalcis nutans (Megerle von Mühlfeld, 1824) (original combination)
34. Species Helix otis W. Turton, 1819 accepted as Otina ovata (T. Brown, 1827) (unaccepted > junior homonym, non Helix otis [Lightfoot], 1786; Otina turtoni Locard, 1886 is a replacement name)
35. Species Helix paradoxa Born, 1780 accepted as Chrysostoma paradoxum (Born, 1780) (original combination)
36. Species Helix perspicua Linnaeus, 1758 accepted as Lamellaria perspicua (Linnaeus, 1758) accepted as Marsenia perspicua (Linnaeus, 1758) (original combination)
37. Species Helix petraea Montagu, 1803 accepted as Melarhaphe neritoides (Linnaeus, 1758) (synonym)
38. Species Helix phasianus Röding, 1798 accepted as Phasianella australis (Gmelin, 1791) (junior objective synonym)
39. Species Helix priamus Gmelin, 1791 accepted as Ampulla priamus (Gmelin, 1791) (original combination)
40. Species Helix pseudoplanorbis Lubomirski, 1880 accepted as Systrophia pseudoplanorbis (Lubomirski, 1880) (unaccepted > superseded combination)
41. Species Helix purpurea Gmelin, 1791 accepted as Cantharidus purpureus (Gmelin, 1791) accepted as Micrelenchus purpureus (Gmelin, 1791) (superseded combination)
42. Species Helix scabra Linnaeus, 1758 accepted as Littoraria scabra (Linnaeus, 1758)
43. Species Helix serpuloides Montagu, 1808 accepted as Skenea serpuloides (Montagu, 1808)
44. Species Helix solida Born, 1778 accepted as Phasianella solida (Born, 1778) (superseded combination)
45. Species Helix stagnalis Linnaeus, 1767 accepted as Eupaludestrina stagnorum (Gmelin, 1791) (junior homonym of Helix stagnalis Linnaeus, 1758; synonym)
46. Species Helix stagnorum Gmelin, 1791 accepted as Eupaludestrina stagnorum (Gmelin, 1791) (original combination)
47. Species Helix subcarinata Montagu, 1803 accepted as Tornus subcarinatus (Montagu, 1803) (original combination)
48. Species Helix subcylindrica Linnaeus, 1767 accepted as Truncatella subcylindrica (Linnaeus, 1767)
49. Species Helix sulphurea C. B. Adams, 1849 accepted as Tonna pennata (Mörch, 1853) (Synonym - Not available)
50. Species Helix terebella O. F. Müller, 1774 accepted as Pyramidella dolabrata (Linnaeus, 1758)
51. Species Helix trumbulli Linsley, 1845 accepted as Skeneopsis planorbis (O. Fabricius, 1780)
52. Species Helix variabilis Megerle von Mühlfeld, 1824 accepted as Rissoa variabilis (Megerle von Mühlfeld, 1824)
53. Species Helix jeannotiana Terver, 1839 (uncertain > unassessed)
54. Species Helix laevigata Linnaeus, 1767 accepted as Velutina laevigata (Linnaeus, 1767) (uncertain > nomen dubium, original combination)
55. Species Helix octona Linnaeus, 1767 (uncertain > nomen dubium)
56. Species Helix unispiralis Montagu, 1803 (uncertain > nomen dubium)

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