284 bulletin: museum of comparative zoology. 



Hyperoche kroyeri was taken only in the Gulf of Maine where it 

 occurred at twelve stations, all near shore, as follows : — 



Station Fathoms Specimens Stations Fathoms Specimens 



10057 15-0 10 10088 80-0 1 



The numbers of specimens concerned are so small that they do not 

 show anything about bathymetric distribution. 



The few captures of Hyperia medusarum are likewise from the Gulf 

 of Maine, and so are most of the Hyperia galba, which is consistent 

 with the distribution of their medusan host Cyanea. But one speci- 

 men of H. galba was taken in the Gulf Stream (Station 10071, 190-0 

 fathoms) . 



The remaining hyperiids were all taken either in the Gulf Stream, 

 or where Gulf Stream water was in evidence : they are all visitors from 

 the south, or at least from the warmer parts of the Atlantic, and 

 do not belong to the permanent plankton of the coast water. 



Vibilia was taken at all the stations outside the continental shelf, 

 and twice over the outer part of the shelf; curiously enough, however, 

 it was not encountered in the Gulf Stream tongue south of Delaware 

 Bay. The depths of the captures are: — 



Thus most of the specimens came from deep hauls, none from the 

 surface. 



Tyro was taken only once, in the Gulf Stream, one specimen, twenty 

 fathoms. Station 10071. 



The two species of Phronima were likewase restricted to the Gulf 

 Stream, and to the outer edge of the shelf, except for a single specimen 

 of sedentaria near Cape May (Station 10080). Though the two 

 agree geographically sedentaria was living deeper than atlantica as 

 shown in the following table of captures. 



