1. Ochetoceras
    [Ochetoceras "hispidum"]
  2. Ochetoceras
    [Ochetoceras canaliculatum]
  3. Ochetoceras
    [Ochetoceras canaliculatum (M)]
  4. Ochetoceras
    [Ochetoceras canaliculatum (m)]
  5. Ochetoceras
    [Ochetoceras raixense]
  6. Oecoptychius
    [Oecoptychius refractus (m)]
  7. Oecotraustes
    [Oecotraustes umbilicatus]
  8. Oistoceras
    [Oistoceras lincolnense]
  9. Olcostephanus
    [Olcostephanus (Jeannoticeras) jeannoti]
  10. Olcostephanus
    [Olcostephanus (Olcostephanus) sayni]
  11. Olcostephanus
    [Olcostephanus (Olcostephanus) sp.]
  12. Onychoceras
    [Onychoceras differens]
  13. Oppelia
    [Oppelia subcostata]
  14. Oppelia
    [Oppelia subradiata]
  15. Orionoides
    [Orionoides indicus (M)]
  16. Orionoides
    [Orionoides indicus (m) juv.]
  17. Orthaspidoceras
    [Orthaspidoceras lallierianum]
  18. Orthaspidoceras
    [Orthaspidoceras lallierianum]
  19. Orthaspidoceras
    [Orthaspidoceras lallierianum juv.]
  20. Orthogarantiana
    [Orthogarantiana densicostata (M)]
  21. Orthogarantiana
    [Orthogarantiana haugi (M)]
  22. Osperleioceras
    [Osperleioceras bicarinatum]
  23. Ostlingoceras
    [Ostlingoceras (Ostlingoceras) aff. colcanapi]
  24. Ostlingoceras
    [Ostlingoceras (Ostlingoceras) puzosianum]
  25. Otohoplites
    [Otohoplites raulinianus]
  26. Otohoplites
    [Otohoplites raulinianus]
  27. Otohoplites
    [Otohoplites subhilli]
  28. Otoites
    [Otoites contractus (m)]
  29. Oxycerites
    [Oxycerites oppeli]
  30. Oxycerites
    [Oxycerites orbis (M)]
  31. Oxycerites
    [Oxycerites yeovilensis]
  32. Oxytropidoceras
    [Oxytropidoceras (Mirapelia) sp.]
  33. Oxytropidoceras
    [Oxytropidoceras (Venezoliceras) karsteni]