A friend is developing his skills at reproducing special trilobites from molds made by the original discoverers. He presented me with a casting of Arctinurus boltoni from the Silurian period new York. The original was found by the famed dry dredger Bill White who luckily made a rubber mold because the specimen was stolen from his car. After his death Mr. White bequeathed a cast from his mold to the Dry Dredgers. A new mold was made and thus my Christmas present. It is 5" by 3 3/4".