Note sur quelques tulitides (Ammonitina) du Bathonien

Describes ammonites belonging to the family Tulitidae from Bathonian (Jurassic) localities of France. Specimens formerly attributed to Ammonites microstoma are assigned to the new genus Treptoceras, with two new species T. laurenti and T. crimaciense A complete specimen of Schwandorfia marginata is also described. The genera Sphaeroptychius, Schwandorfia, and Treptoceras are considered diagnostic of the middle and upper Bathonian.