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\ Vol. LXXII. 



| P*.BT 2. 



< 



No. 286. 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY. 



EDITED BT 



THE PERMANENT SECRETARY. 



[With Five Plates, illustrating Papers by Mr. H. G. 

 Smith, Mr. G. W. Tyrrell, and Mr. E. B. Bailey.] 



September 10th, 1917. 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PARIS:— CHARLES KLINCBSIECK, 11 RUB DE LILLE. 

 BOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



Price Five Shillings. 



