Vol. LXXV 



Part 2. 



THE 



FOR 

 LIBRARY 



QUARTERLY JofflffiCtT"' 



GEOLOGICAL SOCIETY 



EDITED BY 



MAY 6 igio 



[With Six Plates, illustrating Papers by Mr. F 



Mr. It. H. Worth, and Dr. A. L. Du Toit.] 



April 17th, 1920. 



LONDON: 

 LONGMANS, GREEN, AND CO. 



PARIS:— CHARLES KLINCK8IECK, 11 HUE DE LILLE 

 SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



Price Seven Shillings and Sixpence. 



