Fossil Polyplacophora (Mollusca) from Upper Talchir Sediments of Dudhi Nala, Hazaribagh, Bihar

External casts comparable with Polyplacophora (Mollusca), collected from the sand/silt-mud alternation facies (turbidite) of upper Talchir sediments of Dudhi Nala, West Bokaro basin, Hazaribagh district, Bihar are described and illustrated here for the first time. These sediments were reported to be unfossiliferous. Polyplacophoran morphology of the fossils indicate a marine link of the West Bokaro basin during the upper Talchir times. Dudhi Nala area is presently considered to be yet another locality proximal to the eastern limit of the Lower Permian marine incursion in the Indian peninsula along the Raniganj-Daltonganj-Manendragarh-Umaria belt.