168 



bulletin: museum of comparative zoology. 



In the sink east of Cape Ann (Station 10253), however, and the 

 trough west of Jeffrey's Ledge, the temperature was practically uni- 

 form, below the level of the enclosing rim. In the southeast and north- 

 east parts of the Gulf, too, and in the Eastern Channel (Station 10227, 

 Fig. 2), the water was coldest on the bottom, instead of in the mid- 

 depths. In 1914 there was no exception to the rule that in summer the 



Meter 



10 

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 lid 

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5' 6 7 



Temperature, Centigrade 



9 10° 11 12 13 14 15°' 16 17 18 



Fig. 2. — Temperature sections in the western (Stations 10252, 10254) and south- 

 eastern parts of the Gulf of Maine (Station 10225), and in the Eastern Channel 

 (Station 10227), July 1914. 



surface is progressively cooler and cooler, the bottom, depth for depth, 

 progressively warmer and warmer, following the northern coast of the 

 Gulf from Massachusetts Bay around to the Bay of Fundy, the vertical 

 range of temperature decreasing from about 12° off Cape Ann, to 

 practically nil in the Grand Manan Channel (1914a). 



