Four freshwater mussel valves (two complete specimen). The exteriors are dark brown, brown, and tan in color. The interiors are an iridescent silver, white, and pink color with sharp bumps. Shell 21-441.1 has a large shelf-like bulge on the interior. The shells have silver interior nacre and a thick periostracum that has flaked off most of their exteriors. The elongated shells are elliptical in shape with growth lines and striations. The valves have moderately sized muscle scars, small hinge teeth, and rounded posterior and anterior edges.