Unprepared Fossil Crab (Pulalius) In Concretion - Washington

This is an unprepared fossil crab (Pulalius vulgaris) in a large concretion from Southwest Washington. These crabs are found within hard concretions (a mass of rock that forms around organic manner) which must be broken open to find the crab. The crab itself is 2.5" wide and the concretion about 6.5" wide. It's broken in 3 pieces, and the crab appears to have both claws but I don't see any legs exposed.