THE 
QUARTERLY JOURNAL 
OF THE 
GEOLOGICAL SOCIETY OF LONDON. 
EDITED BY 
THE ASSISTANT-SECRETARY OF THE GEOLOGICAL SOCIETY. 
Quod si cui mortalium cordi et cure sit non tantum inventis heerere, 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, Prefatio. 
VOLUME THE FIFTY-EIGHTH. 
1902. 
LONDON: 
LONGMANS, GREEN, AND CO. 
PARIS: CHARLES KLINCKSIECK, 11 RUE DE LiLLE. 
LEIPZIG: T.0. WEIGEL, 
SOLD ALSO AT THE APARTMENTS OF THE SOCIETY, 
LI 2a FS 
MDCCCCII« 
