ANTARCTIC ADVENTURE AND RESEARCH 



such occurrence was described by Shackleton's party 

 from Buckley Island (latitude 85° S.) at the head 

 of the Beardmore Glacier. Debenham, however, thinks 

 Mount Bell (84° S.) is a more likely locality.^ Below 

 the summit of Mount Nansen (latitude 75°) there ap- 



flg. 12. gomphocephalus, the largest animal of 



Antarctica (i millimeter long). Below: Archeo- 



CYATHUS, the OLDEST FOSSIL IN ANTARCTICA, WHERE 

 DWARF FORMS, A FEW MILLIMETERS WIDE, OCCUR. 



peared to be limestones older than the Beacon Sand- 

 stone, which David suggests may also be of the Cam- 

 brian Age. They are present in Coats Lands, as we 

 shall see later. 



Beacon Sandstone. — The structure of the whole 

 **horst" block, which bounds the Ross Sea and the 



^ Sedimentary Rocks of South Victoria Land (British Museum, 

 1921). 



96 



