Here is a ''classic'' US trilobite. It is a Sthenarocalymene celebra from the Silurian of Illinois. We recently obtained this specimen from the DeRosear Collection. Doug acquired this specimen in 1980, and it has been in his collection ever since. This bug is not from the usual Grafton, Illinois location, but from a more obscure site near Bonfield, Illinois. The dolomitic preservation of this trilobite is far superior to the more common Grafton trilobites. The trilobite is extremely inflated and wonderfully articulated. Both free cheeks are intact and tightly attached. The natural, whitish color of the fossil contrasts beautifully with the dark yellow matrix. This is one of the most attractive examples of this trilobite that we have seen.