M- H. 



THE 



6" 8 L iTC 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON 



EDITED BY 



THE ASSISTANT-SECRETARY OF THE GEOLOGICAL SOCIETY. 



Quod si cui mortaliuin cordi et curae sit non tantum inventis haerere, atqu« iis uti, sed ad ulteriota 

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

 opinari, sed certo et ostensive scire; tales, tanquam veri scientiarumfilii, nobis (si videbitur) seadjucgant. 

 — Novum Organum, Proefatio. 



VOLUME THE SIXTY-SECOND. 

 1906. 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PaEIS : CHAKLES KLINCKSIECK, 41 KUE DE LILLE. 



SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 2. % I \ \ 



