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bulletin: museum of comparative zoology. 



was universal, not only in the Gulf but on Georges Bank, and in the 

 coastal waters south of Nova Scotia, occurring not only at every sta- 

 tion, but in practically every haul; by far the most important indi- 

 vidual member of the plankton.^ But it occurred only in small 

 numbers over the continental slope (Stations 10220, 10233, and 10261); 

 and was wanting both in the Gulf Stream plankton off the southwest- 

 ern edge of Georges Bank (Station 10218) and over the outer part of 

 the shelf south of Marthas Vineyard (Station 10259). 



Second only to Calmius finmarchicns numerically, though much less 

 important economically because of its small size, is Pseudocalanus 

 elongatus, which was again found at every station in the Gulf in both 

 years (p. 243), and on Georges Bank; as well as at most of our stations 

 in the cold waters off southern Nova Scotia (Stations 10229-10232; 

 10234-10243), and locally on the shelf south of Marthas Vineyard 

 (Station 10260). But it was lacking at all our deep stations over the 

 continental slope, and on Brown's Bank (Station 10228) as well, 

 which agrees with its absence in the inner edge of the Gulf Stream in 

 1913 (1915). 



The records in 1914, for copepods other than Calanus finmarchicus 

 and Pseudocalanus elongatus, as identified by Dr. C. O. Esterly, are 

 listed in the following table. Only a preliminary examination has yet 

 been made of the copepods taken in 1915. 



1 The numerical occurrence of Calanus is discussed elsewhere, p. 317. 



