Vol. LXXVIII. No. 311. 



Part 3. 



THE 



QUARTERLY JOURNAL 



OF THE 



GEOLOGICAL SOCIETY. 



EDITED BY 



^f NOV - 4 192! 



THE PERMAI^ENT SECREIAR 





September 23rd, 1922. 



[With Ten Plates, illustrating Papers by Dr. H. H. Thomas, 

 Mr. W. G. Shannon, Prof. A. C. Seward & Mr. R. E. Holttum, 

 and Dr. C. W. Andrews.] 



\ LONDON : \ 



LONGMANS, GRKEN, AND CO. 





PARIS:— CHARLES KLINCK8IECK, 11 RUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



Price Sevefi Shillings and Sixpence, 



