1. Olcostephanus
    [Olcostephanus (Olcostephanus) atherstoni (M)]
  2. Olcostephanus
    [Olcostephanus (Olcostephanus) atherstoni (M)]
  3. Olcostephanus
    [Olcostephanus (Olcostephanus) sayni (M)]
  4. Olcostephanus
    [Olcostephanus (Olcostephanus) sayni (M)]
  5. Olcostephanus
    [Olcostephanus (Olcostephanus) sp.]
  6. Orbignyiceras
    [Hecticoceras (Orbignyiceras) gr. trezeense (M)]
  7. Orbignyiceras
    [Hecticoceras (Orbignyiceras) trezeense (M)]
  8. Orthodactylites
    [Dactylioceras (Orthodactylites) semicelatum]
  9. Ostlingoceras
    [Ostlingoceras (Ostlingoceras) aff. colcanapi]
  10. Ostlingoceras
    [Ostlingoceras (Ostlingoceras) puzosianum]
  11. Otosphinctes
    [Perisphinctes (Otosphinctes) arkelli]
  12. Otosphinctes
    [Perisphinctes (Otosphinctes) sp.]
  13. Otosphinctes
    [Perisphinctes (Otosphinctes) sp.]