12 CONTENTS 



PAGE 



The Talbot Formation 95 



Areal Distribution 95 



Structure and Thickness 96 



Character of Materials 96 



Stratigraphic Relations 100 



Interpretation of the Stratigraphic Record 101 



Fossil Remains 101 



Similarity of Materials 103 



Stage of Decomposition 104 



Continuity of Deposits 110 



Similarity of Topographic Form 110 



Geological History 121 



Summary 136 



The Interpretation of the Paleontological Criteria. By Wm. Bullock 



Clark, Arthur Hollick, and Frederic A. Lucas 139 



The Pleistocene Fauna. By "Wm. Bullock Clark 139 



Local Interpretation 139 



Correlation with more Distant Areas 141 



Geological Range of Species 146 



The Pleistocene Flora. By Arthur Hollick 148 



The Elephants of the Pleistocene. By Frederic A. Lucas 149 



SYSTEMATIC PALEONTOLOGY, PLEISTOCENE 153 



Mammalia. By F. A. Lucas 157 



Reptilia. By O. P. Hay 169 



Insecta. By E. H. Sellards 170 



Crustacea. By W. B. Clark 172 



Mollusca. By W. B. Clark 176 



Molluscoidea. By E. O. Ulrich 210 



Ccelenterata. By W. B. Clark 213 



Protozoa. By W. B. Clark 214 



Pteridophyta. By Arthur Hollick 217 



Spermatophyta. By Arthur Hollick 217 



Explanation of Plates 239 



General Index 283 



Paleontological Index 287 



