PLANKTON OF THE GULF OF MAINE 



317 



low temperature and tending to shun strong light. Thus in late February and 

 March of 1920, while the water was still near its annual minimum in temperature, 

 with the surface nowhere warmer than 3.6° in the inner parts of the gulf or 4° to 



Flo. 88.— Locality records (or young Sagitta elegans less than 10 millimeters long, June to October, 1912 to 1916 



5° over the seaward slope of Georges Bank, and with the vertical range of tempera- 

 ture less than 4° at most of the stations, we found large S. elegans indifferently at all 

 the depths at which we towed and almost as regularly at the surface as at any other 



