Upper and middle: Niggerhead (Reginaia ebenus syn. Quadrula ebenus); Lower pair: Hickory-nut, Obovaria olivaria syn. Obovaria ellipsis
...Quadrula ebenus (Lea) from Mississippi River Upper and Middl
Published by:Author: Robert Ervin Coker
(1876–1967) &#Source: Photo on WikiMediaLoading...