Trilobites Figured From United States Geological Survey Professional Paper 1047, Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin, by Allison R. Palmer and Robert B. Halley

Trilobites from the Lower-Middle Cambrian Carrara Formation, Death Valley National Park. All specimens are from the Lower Cambrian Olenellus Zone, figured on Plate 2 and greatly magnified. Figures 1-4 Bristolia fragilis; specimens 2-4 from the Grapevine Mountains; specimen 1 from the Nevada Test Site, outside Death Valley National Park; "2, immature silicified cephalon stage III; 3, immature silicified cephalon stage IV; 4, holotype cephalon. Figures 11-12, Olenellus arcuatus;11, latex cast of cephalon, Grapevine Mountains; 12, holotype cephalon, Funeral Mountains. Figures 13-14, Olenellus cylindricus, Grapevine Mountains;13, holotype cephalon; 14, questionally assigned cephalon lacking advanced genal spines."