CONTENTS 



Part I. Stratigraphy and Faunas Pj^ge 



Acknowledgments 3 



Descriptions of Localities and Sections 3 



General statement 3 



Hawkins County 4 



Hamblen County 10 



Grainger County 12 



Jefferson County I5 



Union County 19 



Claiborne County 21 



Knox County 22 



Monroe County 23 



Purchase Ridge, Scott Coimty, Virginia 24 



Index of Localities 25 



Fauna of the Cedaria Zone 26 



Fauna of the Crepicephalus Zone 28 



Fauna of the Aphelaspis Zone 30 



Part II. Systematic Paleontology 



General Statement 38 



Descriptions of Trilobite Genera and Species 



Order AGNOSTIDA 38 



Family AGNOSTIDAE 38 



Order CORYNEXOCHIDA 39 



Family DORYPYGIDAE 39 



Order PTYCHOPARHDA 40 



Family LONCHOCEPHALIDAE 40 



Family CATILLICEPHALIDAE 44 



Family CREPICEPHALIDAE 45 



Family TRI CREPICEPHALIDAE 54 



Family ASAPHISCIDAE 55 



Family KINGSTONIIDAE 60 



Family MENOMONIIDAE 61 



Family NORWOODIIDAE 64 



Family CEDARIIDAE 69 



Family EL VINIIDAE 71 



Family PTEROCEPHALIIDAE 72, 



PTYCHOPARHDA of uncertain affinities 102 



Undetermined trilobites 112 



References 115 



Explanation of Plates 118 



