Vol. LXXIX. 



Part 1. 



No. 313. 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY. 



EDITED BY 



^^ouUMi Uistfi 





THE PERMANENT SECRETARY. Q in W 



r jun - 



Apeil 11th, 1923. 



m mi*^ 



[With Four Plates, illustrating Papers Iby Dr. L. D. Stamp & 

 Mr. S. W. Wooldridge, and by Dr. W. D. Lang, and one 

 Folding Table, illustrating Dr. L. F. Spath's Paper.] 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PARIS:— CHAELE8 KLINCKSIECK, 11 EUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OP THE SOCIETT. 



Price Seven Shillings and Sixpence. 



