On Some Ammonites from the Cretaceous Fujikawa Formation of Shikoku

Three species of ammonites from the upper part of the Fujikawa Formation of Shikoku are described. They are Hypophylloceras yeharai n. sp., Mariella sp. aff. M. cantabrigiensis ( JUKES-BROWNE), and Desmoceras (Pseudouhligella) dawsoni shikokuense (YABE and SHIMIZU). On the basis of the described species and also of a revised stratigraphic observation, the fossiliferous part of the Fujikawa Formation is referred to the Albian, probably Upper Albian.