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bulletin: museum of comparative zoology. 



Off Chesapeake Bay (Station 10076) the numbers in the deep and 

 shallow hauls were more nearly equal. In the edge of the Gulf Stream, 

 south of Long Island (Station 10064) compressa was ten times as 

 numerous in the haul from 175 fathoms, as in the twenty fathom haul. 

 Euthemisto bispinosa like compressa was more abundant in the 

 deep than in the shallow haul at Station 10064. And it was likewise 

 several times as numerous in the shallow as in the deep haul in the 

 eastern part of the Gulf of Maine (Station 10092). But it was about 

 equally numerous in the two hauls at Station 10061; and off Chesa- 

 peake Bay it was most numerous in the deep haul. 



Specimens of Specimens of 



Station Fathoms bispinosa Station Fathoms bispinosa 



10061 



10064 



10076 



10092 



10097 



35-0 



85-0 



30-0 



80-0 



111 

 29 



The quantitative relationship of the two species to each other is 

 shown in the following table, which gives the relative number of each 

 species in a sample at stations where both were taken. 



