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Vol. I.XXIX. 



Part 3. 



No. 315. 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY. 



EDITED BY /'vV 1 



# "3 



THE PERMANENT SEfpT{fl3G 2 9 1323 



ir 



September 22nd, 1923. 



[With Thirteen Plates, illustrating Papers by Dr. C. T. Trech- 

 mann & Dr. L. F. Spath, Prof. A. C. Seward & Mr. J. Walton, 

 and Major A. R. Dwerryhouse.] 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PARIS:— CHARLES KLINCK8IECK, 11 RUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OE THE SOCIETY. 



Price Seven Shillings and Sixpence. 



