XVI LIST OF ILLUSTRATIONS. 



Page. 



109. Showing areas surveyed and mapped by the Hayden Surveys, 1870-78 . . 604 



110. Portrait of Robert Parr Whitfield. From a photograph 609 



111. Map showing area covered by the Fortieth Parallel Survey 610 



11.2, Portraits of Arnold Hague, Clarence King, and Samuel Franklin Emmons. 



From a photograph 612 



113. Portrait of Grove Karl Gilbert. From a photograph taken about 1874.. 616 



114. Section of the Pahranagat range at Silver Canyon. (After G. K. Gilbert. ) 



From Geological Survey West of One Hundredth Meridian, III, 1875.. 617 



115. Portrait of Edwin Eugene Howell. From a photograph taken about 1875. 618 



116. Portrait of John James Stevenson. From a photograph 618 



117. Map showing area surveyed and mapped by the Powell survey, 1875-80. 620 



118. Portrait of Clarence Edward Dutton. From a photograph 621 



119. Laccoliths. (After G. K. Gilbert.) From Geology of Henry Mountains, 



Utah, 1877 622 



120. Packing flour 624 



121. Fossil footprints. (After Edward Hitchcock.) From American Journal 



of Science, 1836 626 



122. Portrait of James Deane. From a photograph 628 



123. Skeleton of Anchisaurus colarus Marsh. From American Journal of 



Science, XLV, 1893 632 



124. Supposed fossil from Laurentian limestone. (After W. E. Logan.) From 



Geology of Canada, 1863 635 



125. Small weathered specimens of Eozoon canadense. (After J. W. Dawson. ) 



From Chain of Life in Geological Time 636 



126. Magnified group of canals in supplemental skeleton of Eozoon. (After 



J. W. Dawson.) From Chain of Life in Geological Time 637 



127. Portion of Eozoon magnified 100 diameters, showing the original cell 



wall, with tabulation. (After W. B. Carpenter in Dawson's Chain of 



Life in Geological Time) 638 



128. Magnified and restored section of a portion of Eozoon canadense. (After 



J. W. Dawson. ) From Chain of Life in Geological Time 639 



129. Diagram of Eozoonal rock at Cote St. Pierre. (After T. G. Bonney. ) 



From Geological Magazine, II, 1895 644 



130. Map of original Taconic area. ( After Ebenezer Emmons) 660 



131. Section of Taconic rocks. (After E. Emmons.) From Agriculture of 



New York, I 661 



132. Sections explanatory of the Taconic system. (After E. Emmons. ) From 



Natural History of New York, Pt. 4 662 



133. Atops trilineatus. (After E. Emmons.) From Agriculture of New York, 



I, pi. vni 664 



134. Elliptocephala asapliokles. (After E. Emmons.) From Agriculture of 



New York, I, pi. ix 665 



135. Triarthrus beckii and ealoni. (After James Hall.) From American Jour- 



nal of Science, XXXIII, 1837-38, p. 140 666 



L36. (limns thompsoni. (After James Hall.) From Tenth Annual Report 



Regents of the University of State of New York, 1857 6B7 



137. Olenus vermontana. (After James Hall.) From Tenth Annual Report 



Regents of the University of State of New York 66S 



138. Portrait of Elkanah Billings. From a photograph 669 



139. Portrait of Charles Doolittle Walcott. From a photograph taken in 1891 . 672 



140. Tabular view of Taconic strata as arranged by E. Emmons. ( After C. D. 



Walcott.) From American Journal of Science, XXXV, April, 1888 .. 673 



141. Section of Bald Mountain from the south. ( After C. D. Walcott. ) From 



American Journal of Science, XXXV, 1888 674 



Flint Implements op toe Fayum, Egypt. 



By Heywood Walter Seton-Karr. 



1. Map of part of Fayum Desert 748 



