■■■re, 



1 Mf/ 



s 



THE 





QUARTERLY JOURNAL 



GEOLOGICAL SOCIETY OF LONDON. 



THE ASSISTANT-SECRETARY OF 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 naturam vincere ; denique non belle et probabiliter 

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

 —Novum Organum, PrcBfatio. 



VOLUME THE FIFTY-FIFTJ 



1899. 



UG 11 1930 A 



LOJN^DOIS" : 



LONGMANS, GREEN, AND CO. 



PAEIS: CHAELES KLINCKSIECK, 11 RUE DE LILLE. 

 LEIPZIG: T. O.WEIGEL. 



SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 



MDCCCXCIX. 



