Vol. lxxv. No. 297. 



Part 1. 



THE 



QUARTERLY JOURNAL 



OF THE 



GEOLOGICAL SOCIETY 



EDITED BY 



THE PERMANENT SECRETARY/^ai un^ 



[With Three Plates, illustrating Dr. A. Smith Woodward's 

 and Mr. C. J. Gilbert's Papers.] 



January 17th, 1920. 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PARIS:— CHARLES KLINCK8IECK, 11 RUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



Price Seven Shillings and Sixpence. 



