Franconian Trilobites of New York State (New York State Museum Memoir, 23)

iv, 82 pp. CONTENTS: Abstract; Introduction; Acknowledgments; Sources of Trilobite Collections; Sedimentary Environments and Trilobite Associations; Age and Correlation; Systematic Paleontology; Superfamily Olenacea; Family Elviniidae; Subfamily Dokimocephalinae; Dellea; Calocephalites; Subfamily Elviniinae; Elvinia; Drabia; Family Idahoiidae; Saratogia; Family Pterocephaliidae; Camaraspis; Superfamily Dikelocephalacea; Family Saukiidae; Prosaukia; Hoytaspis; Family Ptychaspididae; Subfamily Ptchaspidinae; Keithiella; Superfamily Uncertain; Family Plethopeltidae; Plethopeltis; Bibliography; Plates.