Enrolled Calymene Trilobite

Here are some pictures of a Silurian trilobite called the Calymene breviceps? found in the Waldron Shale of Indiana. It is enrolled which might mean it is not a molt. The cleaning process has not been complete as I think I will leave it partially in the matrix. See the before and after images above. The next image shows the fossil about to break away from its matrix base.