Quart. Journ. Geol. Soc. Vol, LXII, Pl. XII- 



E.J. G., Photo. 



SPRING ISSUING FROM THE RAUCHWACKE, BELOW LAGO TOM. 



Exit. 



Reefs. 



E.J.G., Photo. 



LAGO SCURO, LOOKING NORTH FROM THE WATERSHED. 



