184 



bulletin: museum of comparative zoology. 



On the Nova Scotia Banks, too, there was a very rapid vertical 

 rise in salinity, from the surface downward (Fig. 22). And the 

 stations in the basins on this part of the shelf (Fig. 23) differ from the 

 shallower ones chiefly in continued vertical rise of salinity correspond- 

 ing to the increased depth. But in the sink off Halifax, salinity was 

 vertically uniform below 150 meters, which is the level to which the 



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^^- 



Fig. 18. — Surface salinity, July-August, 1914. 



enclosing rim rises on the south. And this was probably also the case 

 in the basin west of Sanibro Bank (Station 10235). 



The salinity curves for the deep Stations (10218 and 10220) off 

 Georges Bank and abreast of Marthas Vineyard (Station 10261, Fig. 

 24) are all of one type, freshest on the surface, with the maximum at 

 40-100 meters, below which the salinity decreases slowly, to about 34.9- 

 35%o at the lowest level (450-500 meters). Station 10218 was much 



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