Vol. LXX. DECEMBER, 1914. No. 280. 



Paet 4. 



THE 



QUARTERLY JOURNAL 



OF THE 



GEOLOGICAL SOCIETY. 



EDITED BY 



THE ASSISTANT-SECRETARY. 



[With Two Plates, illustrating a Paper b^ 

 Prof. P. Marshall.] 



LONDON : 



MAY 2$ 1 



Q1R 



LONGMANS, GREEN, AND CO. 



PARIS:— CHAELES KLINCKBIECK, 11 RUE DE LILLE. 

 BOLD ALSO AT THE APARTMENTS OP THE SOCIETY. 



Price Five Shillings, 



[Issued April 9th, 1915.] 



