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bulletin: museum of comparative zoology. 



the Gulf (Stations 10225, 10245, 10246, 10249), in the Eastern Channel 

 (Station 10227), on the southern edge of Georges Bank (Station 10219), 

 and over the continental slope (Stations 10218, 10220, 10233). It 

 was predominant in 1915, only locally, in the eastern and northern 

 parts of the Gulf as illustrated by the following table, and chart 

 (Fig. 89). 



E = elegans. 



S = serratodentata. 



The records for 1915, together with data previously acquired show that 

 while S. clegatis occurs very generally all over the Gulf probably at 

 all seasons, (1914a, 1915), the distribution of S. serratodentata de- 

 pends largely upon the season. Thus in May and June it was found 

 only in the eastern part of the Gulf, in the Bay of Fundy, and off south- 

 ern Nova Scotia (Fig. 90); and in four years it was detected only 

 once (1914a, Station 10019) in the western and southwestern parts 

 of the Gulf prior to August 1. In late summer and autumn, on 

 the other hand, it was found at most of the stations there, and in 

 Massachusetts Bay (Fig. 90). Sagitta serratodentata is the prevalent 

 Sagitta in the coastal water south and west of Cape Cod (1915). 



