EDITORIAL. 631 



Mrs. S. Maxon-Cobb, Boulder, Colo.; The Geology of Ogle 

 County, by Mrs. C. M. Winston, Chicago ; The Fossils of the 

 Upper Silurian, by Mrs. Ada D. Davidson, Oberlin, Ohio ; 

 Crinoidea and Blastoidea of the Kinderhook Group as found in 

 the Quarries near Marshalltown, Iowa, by Jennie McGowen, 

 A.M., M.D., Davenport, Iowa; The Evolution of the Brach- 

 iopoda, by Miss Agnes Crane, Brighton, England ; The Mas- 

 todon in Northern Ohio ; Post-Glacial or Pre-Glacial ? by Miss 

 Ellen Smith, Painesville, Ohio ; Palaeontology, by Miss Jane 

 Donald, Carlisle, England ; Glacial Markings, by Miss Thomson, 

 Newcastle, England. 



* 



The general session of the Geological Congress convened at 

 Chicago on August 24, immediately following the close of the 

 meeting of the American Association at Madison. 



The Congress was welcomed felicitously by the President of 

 the Auxiliary, Charles C. Bonney, and briefly by the Chairman 

 of the Committee on Organization. 



Dr. A. R. C. Selwyn presided over the first session ; Pro 

 fessor Joseph LeConte and Mr. Hjalmar Lundbohm, of Sweden, 

 over the second session ; and Professor James Hall and Dr. 

 Groth, of Munich, over the third. The following papers were 

 presented : 



Pre-Cambrian Rocks of Wales, Dr. Henry Hicks, London, 

 England ; The Classification of the Rock Formations of Canada, 

 with Special Reference to the Paleozoic Era, by Henry M. Ami, 

 Geological Survey of Canada ; The Cordilleran Mesozoic Revo- 

 lution by Dr. A. C. Lawson, University of California ; The Oil 

 Shales of the Scottish Carboniferous System, by Henry M. 

 Cadell, late of the Geological Survey of Scotland ; Distribution 

 of Pre-Cambrian Volcanic Rocks along the Eastern Border of 

 the United States and Canada, by Professor George H. Williams, 

 Johns Hopkins University ; Huronian versus Algonkian, by Dr. 

 A. R. C. Selwyn, Director Geological Survey of Canada; On 

 the Migration of Material during the Metamorphism of Rock 

 Masses, by Alfred Harker, St. John's College, Cambridge, Eng- 



