Cuspidaria inflata

Cuspidaria inflata is a species of Bivalve found in the London Clay, it has been found at Sheppey, Aveley, Herne Bay, Hampton Pier and Seasalter. 

An example of the species can be seen on the right, this specimen is preserved in pyrite. 

Image taken from Tony Mitchell's Database with Tony Mitchell's help and permission. 

https://kentfossildatabase.co.uk/