Vol. lxxvi. No. 303. 



Part 3. 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY. 



EDITED BY 



THE PERMANENT SECRETARY. 



APR 1 4 ikl 



%> tt6l Mcwi^f' 1 



[With Seven Plates, illustrating Papers by Mr. J. W. D. Robin- > 



I son, Mr. S. H. Warren, and Prof. A. H. Cox & Mr. A. K. Wells.] \ 



\ ■ < 



January 17th, 1921. \ 



LONDON : 

 LONGMANS, GREEN, AND CO 



PARIH:— CHARLES KLINCK8IECK, 11 RUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OP THE SOCIETY. 



Price Seven Shillings and Sixpence . 



