234 British Antarctic Expedition. 
or the absence of some, for the development of one 
particular element, vital conditions, which, in many 
cases have as yet not been identified by us, but which, 
perhaps, would give us a valuable link in regard 
to the mystery of distribution of organisms. 
During 
the sledge 
journey оп 
which the 
insects were 
discovered, 
we pitched 
our tent in 
Crescent 
Bay оп 
Duke o 
ICE BARRIER NEAR DUKE OF YORK ISLAND. York Island 
From there we made a sledge journey into the bay 
to the S.E., an arm of Robertson Bay, at the end of 
which we found a very low approachable land. It 
was a kind of beach rising from the bay to a height 
of about 3o ft. This land was partly formed by the 
glacier, and partly through stone avalanches from the 
mountain side to the N.E. As a marking line between 
this work of the glacier and that of the mountain . 
ravines, there was a small creek rippling down among 
the boulders and rocks from two small lakes which 
were formed through the melting of the great Murray 
Glacier. 
I found a dead white seal on this beach, and 
300 yards further up the beach was another seal of 
the white kind. Before we returned to Camp Ridley 
we thoroughly explored the vicinity to the height 
