206 bulletin: museum of comparative zoology. 



just north of Cape Ann (Station 10103), and close to the coast of 

 Maine east of Mt. Desert (Station 10098) ; saltest in the centre of the 

 Gulf and over the eastern basin (Stations 10092, 10093, and 10100), 

 and over the edge of the Nova Scotian slope (Stations 10094, and 

 10096). And this is further illustrated by the following table of the 

 mean salinity of the upper 50 fathoms : — 



Station Mean sal. 



The mean salinity between 50 and 100 fathoms was lowest at 

 Station 10089, highest in the eastern basin (Station 10093), as fol- 

 lows : — 



Station Mean sal. Station Mean sal. 



10088 33.5 10093 33.7 



10089 33.35 10097 33.5 



10090 33.55 10100 33.6 

 10092 33.6 



Salinity on the bottom. The bottom salinity of the Gulf (Fig. 36) 

 depended chiefly on depth, the bottom water of the basins being from 

 34%o to 34.27%o. The bottom salinity of the coastal zone surrounding 

 the whole Gulf was below 33%o (32.5%o-32.9%o), the curve of 33%o 

 agreeing, roughly, with the fifty fathom contour of the bottom. But 

 there were various local anomalies, already pointed out, especially 

 the abnormally low bottom salinities of the several circumscribed 

 sinks on the western side of the Gulf. 



Salinity profiles. The profile from Massachusetts Bay to German 

 Bank (Fig. 48, Stations 10106, 10087, 10088, 10090, 10092, 10093, 

 10094, 10095), shows that the water was salter in general, depth for 



1 Mean for 40 fathoms. 2 Mean for 30 fathoms. 



