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bulletin: museum of comparative zoology. 



the saltest of the three, its salinity rising above 36%o at 40-50 meters, 

 Station 10220 the freshest. But while the maximum for Station 

 10261 was only about 35.4%o, it was sUghtly the saltest of the three 

 below 300 meters. 



The deep Station off Nova Scotia (10233, fig. 24) was much fresher 

 on the surface, as fresh, indeed, as the water on the continental shelf; 

 the salinity rising to the maximum of 34.96%o at 300 meters: below 

 which it decreased to 34.83%o at 500 meters, i. e., about the same as 

 the water off Georges Bank at the same level. 



The stations on the continental shelf south of Marthas Vineyard 

 are still to be mentioned. Close to the land (Stations 10258 and 10263) 

 the vertical salinity range was considerable, but very small (only 



Fig. 23. — Salinity profile from the Eastern Basin of the Gulf of Maine (Station 

 10249) across German Bank (Station 10244) to the neighborhood" of Cape Sable 

 (Station 10243) August 11-13, 1914. 



about .l%o) over the 60 meter contour (Station 10259), and the curve 

 for the latter was of an unusual type, saltest on the surface, freshest 

 in mid-depths. 



Salinity Profiles. — The high salinity of the eastern as compared 

 with the western side of the Gulf, now known to be a characteristic 

 feature in summer (1914a, 1915), is sufficiently illustrated by a profile 

 running from the center of the Eastern Basin toward Cape Sable (Fig. 

 25). But though the influence of the still salter water of the Eastern 

 Channel was evident in the high salinity at Station 10245, German 

 Bank (Station 10244) was its eastern limit; east of which there was a 

 sudden transition to much lower salinity in the Northern Channd and 

 off Cape Sable (Stations 10229, 10230, p. 336). 



