Top--A trilobite from the lower Devonian Rabbit Hill Limestone, Eureka County, Nevada, a number of miles west of the western border of White Pine County, Nevada. Called scientifically Phacops canadensis.

Bottom--Gastropods from the lower Devonian Rabbit Hill Limestone, Eureka County, Nevada, a number of miles from the western border of White Pine County, Nevada. All belong to genus Platyceras. Photographs courtesy Charles W. Merriam; I edited and processed the images through photoshop.