1. Species Helicina (Oligyra) barbata Guppy, 1895 accepted as Helicina dysoni L. Pfeiffer, 1849 (unaccepted > junior subjective synonym)
2. Species Helicina (Oligyra) convexa L. Pfeiffer, 1849 accepted as Helicina convexa L. Pfeiffer, 1849 (unaccepted > superseded combination)
3. Species Helicina (Oligyra) dubiosa (C. B. Adams, 1850) accepted as Alcadia dubiosa (C. B. Adams, 1850) (unaccepted > superseded combination)
4. Species Helicina (Oligyra) epistilia Guppy, 1868 accepted as Helicina platychila (Megerle von Mühlfeld, 1824) (unaccepted > junior subjective synonym)
5. Species Helicina (Oligyra) guadelupensis [sic] accepted as Alcadia guadaloupensis (G. B. Sowerby II, 1842) (unaccepted > misspelling, unaccepted combination)
6. Species Helicina (Oligyra) humilis Guppy, 1868 accepted as Helicina guppyi Pease, 1871 (unaccepted > junior homonym, junior homonym of Helicina humilis Hombron & Jacquinot, 1854)
7. Species Helicina (Oligyra) mazei Crosse, 1874 accepted as Helicina antillarum G. B. Sowerby II, 1842 (unaccepted > junior subjective synonym)
8. Species Helicina (Oligyra) megastoma C. B. Adams, 1849 accepted as Alcadia megastoma (C. B. Adams, 1849) (unaccepted > superseded combination)
9. Species Helicina (Oligyra) occulta Say, 1831 accepted as Hendersonia occulta (Say, 1831) (unaccepted > superseded combination)
10. Species Helicina (Oligyra) sericea Drouët, 1859 accepted as Alcadia sericea (Drouët, 1859) (unaccepted > superseded combination)
11. Species Helicina (Oligyra) substriata J. E. Gray, 1824 accepted as Helicina fasciata substriata J. E. Gray, 1824 (unaccepted > superseded combination, unaccepted rank)
12. Species Helicina (Oligyra) velutina Guppy, 1868 accepted as Helicina guppyi Pease, 1871 (unaccepted > junior homonym, of Helicina velutina Poey, 1858)
13. Species Helicina (Oligyra) antillarum G. B. Sowerby II, 1842 represented as Helicina antillarum G. B. Sowerby II, 1842
14. Species Helicina (Oligyra) borealis E. von Martens, 1890 represented as Helicina borealis E. von Martens, 1890
15. Species Helicina (Oligyra) cordillerae L. Pfeiffer, 1857 represented as Helicina cordillerae L. Pfeiffer, 1857
16. Species Helicina (Oligyra) fasciata Lamarck, 1822 represented as Helicina fasciata Lamarck, 1822
17. Species Helicina (Oligyra) foveata L. Pfeiffer, 1854 represented as Helicina foveata L. Pfeiffer, 1854
18. Species Helicina (Oligyra) moussoniana L. Pfeiffer, 1866 represented as Alcadia moussoniana (L. Pfeiffer, 1866)
19. Species Helicina (Oligyra) orbiculata (Say, 1818) represented as Helicina orbiculata (Say, 1818)
20. Species Helicina (Oligyra) phasianella L. Pfeiffer, 1856 represented as Helicina phasianella L. Pfeiffer, 1856
21. Species Helicina (Oligyra) platychila (Megerle von Mühlfeld, 1824) represented as Helicina platychila (Megerle von Mühlfeld, 1824)
22. Species Helicina (Oligyra) raresulcata L. Pfeiffer, 1861 represented as Helicina raresulcata L. Pfeiffer, 1861
23. Species Helicina (Oligyra) rawsoni L. Pfeiffer, 1867 represented as Helicina rawsoni L. Pfeiffer, 1867
24. Species Helicina (Oligyra) subglobulosa Poey, 1852 represented as Helicina subglobulosa Poey, 1852
25. Species Helicina (Oligyra) succincta E. von Martens, 1890 represented as Helicina succincta E. von Martens, 1890
26. Species Helicina (Oligyra) reeveana L. Pfeiffer, 1849 (uncertain > taxon inquirendum)
27. Species Helicina (Oligyra) striatula G. B. Sowerby II, 1842 (uncertain > taxon inquirendum, a primary junior homonym of Helicina striatula Potiez & Michaud, 1838)

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