

3 



THE 



^ 



v^ ~" .-' / 



/ 



'■■ V 



/ y 



QUARTERLY JOURNAL 



or THE 



GEOLOGICAL SOCIETY OF LONDON. 



EDITKD 1!Y 



THE PERMANENT SECRETARY OF THE GEOLOGICAL SOCIETY. 



Quod si cui mortaliiim cordi et curae sit non tantum iiiventis hserere, atque iis uti, sed ad ulteriora 

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

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

 — NoviDH Organum, Frcefaiio. 



VOLUME THE SEVENTY-EIGHTH, 



FOR 1922. 







LONDON : 

 LONGMANS, GREEN, AND CO. 



PAEIS: CHARLES KLINCKSIECK, 11 RUE DE LILLE. 

 SOLD ALSO AT THE APARTMENTS OF THE SOCIETY, 

 MCMXXII. 



