360 
BATHYMETRICAL SURVEY" OF 
doubtless correlated with the curving outline. The contours at 50 feet 
and 100 feet are continuous. A little over 2 miles from the west end of 
the loch there is an abrupt narrowing, and the loch continues narrow to 
the end. Corresponding with this the 200-feet contour is broken into 
two basins. In the narrow western part is a separate 200-feet basin, 
with a maximum depth of 262 feet; this is only separated from the 
FIG. 53. LOCH ARKAIG^ FROM THE EAST END. 
(Ph.ntograiyli hy Mr. JameR Chmnley.) 
main 200-feet basin by a slight shallowing to 183 feet. The main 200- 
feet basin is about 8 miles long ; it includes three areas of over 300 feet, 
which, however, are only separated by very slight shallowings. The 
largest of these 300-feet areas is about 2 miles long, is situated just 
about the middle of the loch, and includes the maximum depth of 359 
feet. The others, further to the east, are close together, and of very 
slight extent. Though the wide portion of the loch, fully 9 miles in 
length, forms a simple basin, there is not the well-marked U -section 
found in typical glacier-formed lochs (see cross-section E-F on map). 
