Proceedings Am. Philos. Soc. Vol XLIX. No. 194 



Plate XXVII 



A. Portion of the southeast face of the Tuktoo glacier tongue showing 

 the projection of the upper layers apparently as a result of overthurst (after 

 Chamberlin). 



B. Ice-face at eastern margin of the inland-ice of Greenland in latitude 

 77° 30' N. (after Trolle). 



