A couple weeks a what looked like a curved diaphysis cleanly split doen the middle was exposed in the clay and sand when the water receeded preceeding the wake of a large heavily loaded tanker. When I got home I matched it up with the big end I four about months ago and over the last couple weeks matched up another 3 smaller pieces from my miscellaneous cylindrical fragment box collected from the site over the last couple years. Up close the bone just lookes different than the mammal material