//J I H ' THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTANT-SECEETARY OF THE GEOLOGICAL SOCIETY. 



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

 letrare ; atque non disputando adversarium, sed opere naturam vincere ; deniquc non belle et probabiliter 

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

 Novum Organum, Prafatio, 



VOLUME THE TWENTY-Se^JOND. 



PART THE FIRST. 

 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



LONDON : 



LONGMAN, GEEEN, READER, AND DYER. 



LRIS:— FRIED. KLINCKSIECK, 11 RUE DE LILLE; J. ROTHSCHILD, 14 RUE DE BUCi. 

 LEIPZIG, T. O. WEIGEL. 



SOLD ALSO AT THE APARTJIENTS OF THE SOCIETY. 

 MDCCCLJCVI, 



