550 34.15 ' 



SI6MA-T SURFACE 

 25.0 



18" 



•35.1 



160° 159° 158° 157° 156° 155° 154° 160° 159° 158° 157° 156° 155° 154° 



23° 



'•'■2 . 



340- 

 34 25- 



SI6MA-T SURFACE 

 26.0 



-320 



.-34.25 



22' 



2 r 



34.2 



300—1 20° - 



19° 



I8< 



FACE 



280 260 



SIGMA-T SURFACE 

 25.5 



160° 159° 158° 157° 156° 155° 154° 160° 159° 158° 157° 156° 155° 154° 



23° 



22' 



2 I' 



20' 



19° 



18° 



Figure 7. --Bathymetric chart (depth in meters) of the 26. 5, 26. 0, 25. 5, 

 25.0, 24.5, and 24.0 signna-t surfaces, H. M. Smith cruise 17, Sep- 

 tember 1952. Contour interval 20 m. Dashed lines indicate the salin- 

 itv ( /oo) distribution on these surfaces with contour intervals of 

 0.5 /oo. 



36 



