Probable ammonoid jaws from the Late Devonian at Kowala in the Holy Cross Mountains. B. Large aptychus with separated valves from the same stratum. C-F. Juvenile anaptychi possibly belonging to Tornoceras, from the earliest Famennian with the organic chitinous tissue carbonized or pyritized (C). G. Carbonized anaptychus, possibly from the latest Frasnian and belonging to a gephyroceratid.