yfiin' (ridrlin- Rcgtoli. AJo!<l(i. — ( 'iix/ihi(/. 'I'll 
glacier over wliicli the ice has swept, diminutive lal<es occur. 
Two are found on nunatak H, five or six on Gr. several on the 
spurs of Mt. Wright, others on the ridges on the western side of 
the inlet, occasionally one on the islands in the bay. They occupy 
small depressions or Ijasins on the tops of these ridges. 
Through a large part of the year these are filled with snow, but 
in all those observed this snow entirely disappears during sum- 
mer. Some of these small l^asins are dry for a part of the sum- 
mer, l)ut in the case of most of them, either snow or water is 
found throughout the year. They depend solely on the precipita- 
tion for their water supply, and the loss is by evaporation mainly. 
They are all very small, only a few yards in diameter and with 
no great depth. Some of them clearl}- occupy rock Ijasins, rock 
in place being readily traced all round them, the proof that ice has 
filled the basin being furnished l)y the stria? which run in at one 
end and out at the other. Other lakes have a portion of their 
shores formed of glacial deljris. The conclusion cannot l)e avoided 
that these hollows were the work of ice. In most cases the method 
of their formation seems clear. They mainly lie in the small val- 
leys on the mountain ridges, whose origin has l^een referred to.* 
occupying the most depressed parts of those valleys. The ice mov- 
ing down this slope must have impinged with great force at the 
bottom, tending to the production of a hollow, especialh' if aided 
bj" a somewhat greater amount of loosening of the blocks than 
usual. The sides of these valleys are not planed smooth by the 
ice, Init present surfaces of considerable roughness. 
The rough edges have uniformly been somewhat smoothed, hut 
the character of the surfaces seems to me to clearly show that the 
valleys and the basins have l)een formed l)v the removal of 
loosened blocks, leaving a rough jagged surface whose edges have 
been smoothed and polished. 
The ishirids 1)1 Gl (icier hay. — Several low islands project from 
the waters of Glacier bay. two of them occuring in >Iuir iidet. 
Upon tlicni all. tlie two in Muii' inlet especially, the ice must have 
exerted gi-eat force, for they lie directly in its path at a time when 
it was hemmed in between high rocky walls. Moreover the ice. 
in Muir inlet at least, had just passed from a wide amjjhitheatre 
into a narrow valley, in which last it must have moved with con- 
siderably accelerated velocity. As a natural result the rocky 
*See ante. 
