﻿N> H 



THE 



QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTANT-SECRETARY OE 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 naturani vincere ; denique non belle et probabiliter 

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

 — Novum Organum, Prtefatio. 



VOLUME THE SEVENTEENTH. 

 1861. 



PART THE FIRST. \* 

 PROCEEDINGS OF THE GEOLOGICAb^JWilt flfltf^ 



LONDON : 



LONGMAN, GREEN, LONGMANS, AND ROBERTS. 



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

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



SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



MDCCCLXI. 



