Vol. Lxxviir. 



Paet 1. 



No. 309. 



THE 



QUARTERLY JOURNAL 



OF THE 



GEOLOGICAL SOCIETY. 



EDITED BY 



THE PERMAI^ENT SECRETARY 



March 31st, 1922. 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PARIS :— CHARLES KLINCK8IECK, 11 RUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OP THE SOCIETY. 



Price Seven Shillwgs and Sixpence, 



