3 ^ i - 



N- H. 







THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTANT-SECRETARY OF THE GEOLOGICAL SOCIETY. 



Quod si cui mortalium cordi et curie sit non tantum inventis hserere, atqu« iis uti, sed ad ulteriora 

 penetrare ; atque non disputando adversarium, sed opere naturam vincere ; denique non belle et probabiliter 

 «opinari, sed certo et ostensive scire; tales, tanquatn veri scientiarum filii, nobis ( si videbitur) seadjungant. 

 — Novum Organum, Prcefatio. 



VOLUME THE SIXTY-THIRD. 

 1907. 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PARIS : CHAELES KLINCKSIECK, 11 RUE DE LILLE. 



SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



MDCCCCVII. 



xw?-9/ 



