M H. THE 



QUARTERLY JOURNAL 



OF THE 



GEOLOGICAL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTANT-SECRETARY OF THE GEOLOGICAL SOCIETY. 



Quod si cui mortalium cordi et curae sit non tantum inventis haerere, atque 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, tanquam veri scientiarum filii, nobis (si videbitur) se adjungant. 

 — Novum Organum, Prcefatio. 



VOLUME THE NINETEENTH. 

 1863. /S> 





0m ins 



(^943H5 



PART THE FIRST. \a 

 PROCEEDINGS OF THE GEOLOGICAL SOefj^J0*Uj!> 



LONDON : 



LONGMAN, GREEN, LONGMAN, ROBERTS, AND GREEN. 



PARIS:— FRIED. KLINCKSIECK, 11 RUEDE LILLE; J. ROTHSCHILD, 14 RUE DE BUCI ; 



LEIPZIG, T. O. WEIGEL. 



SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 

 MDCCCLXIII. 



