

THE 



QUARTEELY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTANT-SECRETAEY OE THE GEOLOGICAL SOCIETY. 



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

 penctrare ; atque non disputando adversarium, sed opere naturam viucere ; denique non belle et probabilitcr 

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

 — Novu7n Organum, Prcefatio, 



VOLUME THE TWENTY-FOURTH. , 



1868. /^ '^ 



PART THE FIKST. - -^ ^ 



PROCEEDINGS OF THE GEOLOGICAL ScfcftSg^H^ "0^^ 



rV?.SH->5 



LONDON : 

 LONGMAN, GREEN, READER, AND DYER. 



PARIS;— FRIED. KLINCKSIECK, 11 RUE DE LILLE; J. ROTHSCHILD, 14 RUE DE BUCL 

 LEIPZIG, T. O. WEIGEL. 



SOLD ALSO AT THE APARTMENTS Q^ THE SOCIETY. 



MDCCCLXVIII. 



