^SZ), ^^^ 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTANT-SECRETARY OF THE GEOLOGICAL SOCIETY. 



Quod si cui mortalium cordi et curae sit non tantum inventis hserere, atque iis uti, sed ad ulteriora 

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

 opinari, sed certo et ostensive scire ; tales, tanquara veri scientiarum filii, nobis (si videbitur) se adjungant. 

 — Novum Organum, Prcefatio, 



VOLUME THE EIGHTEENTH. 



1862. ^0^- •■/^/>- 





/« 



'4' 



2S4SH4 



PART THE FIRST. \ j 



PROCEEDINGS OF THE GE0L0GICAK^J;I|:TY. ^^^ 



LONDON : 

 LONGMAN, GREEN, LONGIVIANS, AND ROBERTS. 



PARIS:— FRIED. KLINCKSIECK, 11 RUE DE LILLE; BAUDllY, 9 RUE DU COQ, 

 PRES LE LOUVRE; LEIPZIG, T. O. WEIGEL. 



SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



MDCCCLXII. 



