The World's Geological Congress. 483 
The Extent and Lapse of Time Represented by Uncon- 
formities—Prof. C. R. Van Hise, U. S. Geological Survey. 
The Phylogeny of the Classes of Vertebrates—-Dr. O. 
Jaekel, Berlin, Germany. 
Restoration of Clidastes (illustrated )—Prof. 8. W. Willis- 
ton, University of Kansas. 
Special Discussion. 
‘‘What are the Principles and Criteria to be Observed in 
the Restoration of Ancient Geographical Outlines ?’—by 
Dr. W. J. McGee. 
Saturday, August 26. 
Glacial Succession in the British Isles and Northern 
Europe—Dr. James Geikie, Geological Survey of Scotland, 
Glacial Succession in Sweden—Hjalmar Lundbohm, (eo- 
logical Survey of Sweden. 
Glacial Succession in Switzerland—Dr. Albrecht Heim, 
Zurich. 
The Succession of the Glacial Deposits of Canada—Dr. 
Robert Bell, Canadian Geological Survey. 
Glacial Succession in the United States—Dr. T. C. Cham- 
berlin, University of Chicago. 
Pleistocene Climatic Changes—Warren Upham, Geolo- 
gical Survey of Minnesota. 
Evidences of the Diversity of the Older Drift in North- 
western Ilinois—Frank Leverett, U.S. Geological Survey. 
The presence of the venerable Prof. Hall at the Congress 
was the signal for a hearty welcome ae tendered him 
as he entered the hall. 
In the discussion which followed the reading of Dr. Sel- 
wyn’s paper entitled “ Huronian versus Algonkian,” Prof. 
Van Hise stated that the term Algonkian was only a pro- 
visional one. Prof. T. C. Chamberlin advocated the use of 
the term Proterozoic in the place of Algonkian, inasmuch 
as the termination of the letters is not uniform with such 
terms as Paleozoic, Mesozoic, ete., to which the term 
Algonkian is alleged to be comparable. 
