246 bulletin: museum of co:yiPARATiVE zoology. 



data from the continental shelf south of New York in that year, but 

 in May, 1909 (1910), when there were no records for the northern part 

 of the shelf, 34%o water was found over the shelf opposite Cape May, 

 just as was the case in May, 1913 (p. 188). And in August, 1909 

 (1911), 34%o water lay close to land south of Cape Cod, agreeing with 

 the Grampus station in this region in August, 1913. In November, 

 1909, the curve of 34%o salinity followed the southern edge of George's. 

 Bank: but the Bulletins contain no more recent records for the con- 

 tinental shelf. 



So far as the rather meagre data show, salinity, like temperature, 

 was normal in 1913. 



\ 



Oceanography of the Gulf of Maine in the summers of 1912 

 AND 1913. 



The surface water next the coast between Cape Ann and Penobscot 

 Bay was l°-4° warmer in 1913 than the year before. But from Penob- 

 scot Bay to Mt. Desert and again off the Grand Manan Channel the 

 readings were about 2°-3° below those of the preceding year. And 

 this was also the case on German Bank (48° in 1913, 50° in 1912). 



The readings at corresponding stations, tabulated below, show how 

 closely the surface temperature agreed in the two summers, in the 

 central and southwestern parts of the Gulf: — 



The area which was warmest in 1913 (Fig. 1) was not visited in 

 1912. Conversely less attention was devoted to Massachusetts Bay 

 and to the coastal zone in general in 1913 than in 1912. But so far 

 as the observations in the Bay go, the surface temperature, month 

 for month, was about the same there in the two years. 



The subsurface temperatures of 1913 did not differ an;y^'here in 

 the Gulf from those of 1912 by more than 5°. August stations in 

 Massachusetts Bay in the two years, at nearly the same locality 



