££& 



Vol. LXVII. NOVEMBER, 1911. No. 268. 



Paet 4. 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY. 



EDITED BY 



THE ASSISTANT-SECRETARY. 



[With Fifteen Plates and One Folding Table, illustrating 

 Papers by Prof. W. S. Boulton, Mr. E. E. L. Dixon & 

 Dr. A. Vaughan, Prof. J. W. Gregory, Mr. R. B. Newton, 

 Mr. R. J. L. Guppy, and Mr. R. H. Rastall.] 



LONDON 



tc BfrSii 



LONGMANS, GREEN, AND CO 



PARIS:— CHARLES KLINCKSLECK, 11 RUE DE LILLE 

 SOLD ALSO AT THE APARTMENTS OP THE SOCIETY. 



Price Five Shillings. 



** 



[Issued January 10th, 1912.] 



