Description: This trilobite is a member of the Order Lichida, Family Lichidae from the Silurian Rochester Formation deposits of Middleport, New York, known as Arctinurus boltoni. The species is referred to by some as the “Emperor of North American trilobites”, and fittingly so. Notice the fine details in the many pustules found upon the surface of the exoskeleton. The diagnostic pleural and pygidial spines are well in evidence, and the trilobite is quite 3-D in relief. This is a very fine example of the taxon, one sure to serve as a cornerstone of any collection. Minor repair to the right side of the glabella and right free cheek render this a highly affordable example of this uncommon trilobite. The operator of the quarry advises me that less than 25% of the normal complement of specimens was collected this field season.