

2-^ 



THE 



A-^ 



lOU 



QUARTERLY JOURNAL 



GEOL0(;i( AL SOCIETY OF LONDON. 



EDITED BY 



THE ASSISTAXT-SECLiETARY OF THE GEOLOGICAL SOCIETY. 



Quod si cui raoi'talium cordi et curse sit noii tantum inventis haerere, atque iis uti, sed ad ulteriora 

 penetrare : atque non disputando adversarium, fied opere naturam vincere ; denique nou belle et probabiliter 

 opinari, sed eerto et ostensive scire ; tales, tanquam veri seientiarum filii, nobis (si ridebitur) se adjungant. 

 —Novv.iii Organum, PrcEfatio. 



VOLUME THE SIXTY-EIGHTH 

 1912. 



Q\\\^H iNsrTr^ 



LONDON : 

 LONGMANS, GREEN, AND CO. 



PAEIS : CHAELES KLIIs^CKSIECE:, 11 EUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OF THE SOCIETY. 

 JIDCCCCXII. 



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