This is a unique arthropod fossil. It is a distinct Naraoia compacta from the famous Burgess Shale locality. This specimen is from an OLD collection, and was found DECADES ago. This arthropod has very good detail preserved (MUCH better than the photo shows). The trilobitomorph is easily seen on the natural plate of shale. This is a fine specimen for someone who wants a nice trilobite fossil from the classic Burgess Shale.