Mollusks from the Barremian Lower Hanoura Formation, Tokushima Prefecture

Early Cretaceous Bivalves from the Lower Hanoura Formation of the Monobegawa Group in Tokushima, East Shikoku, are described. Forty eight species of thirty seven genera, including four new species, are dealt with. The species are as follows: - Nucula sp., Nuculopsis shidoensis (Yabe and Nagao), Portlandia sanchuensis (Yabe and Nagao), Mesosaccella choshiensis Hayami, Cosmetodon nipponicus (Nagao), Cucullaea obliquata (Amano), Nanonavis yokoyamai (Yabe and Nagao), Barbatia hiroyasensis sp. nov., Glycymeris matsumotoi Tashiro, Modiolus obatus sp. nov., Amygdalum ishidoense (Yabe and Nagao), Pinna sp. cf. P. robinaldia d’Orbigny, Pterinella shinoharai Hayami, Gervillia forbesiana d’Orbigny, Isognomon ichikawai Hayami, Entolium sanchuense Hayami, Entolium ikedai Tashiro, Entolium nishikawai, sp. nov., Neithea hanourensis Tashiro and Kozai, Neithea atava (Römer), Parvamussium kimurai (Hayami), Plicatula monobensis Tashiro and Kozai, Plicatula kiiensis Hayami, Limatula Nagaoi Hayami, Amphydonte sp. cf. A. subhaliotoidea (Nagao), Lopha nagaoi Hayami, Rastellium carinatum (Lamarck), Rutitrigonia yeharai Kobayashi, Pterotrigonia pocilliformis (Yokoyama), Astarte subsenecta Yabe and Nagao, Yabea shinanoensis (Yabe and Nagao), Yabea sp. aff. Y. shinanoensis (Yabe and Nagao), Eriphyla sp. aff. E. oblonga Freneix, Anthonyaelongata sp. nov., Globocardium sphaeroideum (Forbes), Granocardiumbrevis Tashiro and Kozai, Granocardium ishidoense (Yabe and Nagao), Leptosolen amabilis Tashiro and Kozai, Ptychomya densicostata Nagao, Scittila japonica Hayami, Scitilla dericatostriata Tashiro and Kozai, Caestocorbla shikamai Hayami, Panopea plicata (Sowerby), Pholadomya miyamotoi Nagao, Gonyomya subarchiaci Nagao, Goniomya hayamii Tashiro and Kozai, Plectomya concentrica Tashiro and Kozai, Plectomya aritagawana Hayam