166 



BULLETIN OF THE BUREAU OF FISHERIES 



gulf during August, 1913 (Bigelow, 1915, p. 279). Like Hyperia, it was far less com- 

 mon in 1914, when we took it only once within the gulf limits and occasionally off 

 the Nova Scotian coast east of Shelburne (Bigelow, 1917, p. 289); in 1915 it was 

 taken at several stations, but never more than one or two specimens at any. Judg- 

 ing from the regularity with which it appeared in Massachusetts Bay during the 

 winter of 1912-1913 (.Bigelow, 1914a, p. 410; six out of nine stations, but only 

 one or two examples on each occasion), Hyperoche is at least as common during 

 the period from November to February as during the warm months; but it has not 

 been detected at all at any of the stations occupied in late February, March, April, 

 or May, suggesting that it becomes very rare in the gulf, if it does not entirely 

 vanish thence, when the water is at its coldest for the year. 



Our captures of Hyperoche in the Gulf have all been near shore, for the most 

 part within the 100-meter contour (Bigelow, 1915, p. 284), but the numbers of 

 specimens concerned are too small to throw any light on its bathymetric distribu- 

 tion or on the relationship which its occurrence bears to the physical state of the 



waters of the gulf. 



Parathemisto oblivia 



Parathemisto oblivia has been detected twice in our hauls in the open gulf (sta- 

 tions 10032 and 10036, August 16 and 20, 1912) and at three stations off the outer 

 coast of Nova Scotia (Bigelow, 1917, p. 289), all in late summer. Doctor Huntsman 

 informs me that it breeds locally under estuarine conditions in the Bay of Fundy 

 also. This amphipod is far more abundant in North European waters, where it 

 plays much the same role as does Euthemisto in our gulf and sometimes occurs in 

 shoals right up to the land (Edward, 1868; Tattersall, 1906; Tesch, 1911). 



Oceanic hyperiids 



Our stations along the continental slope have occasionally yielded oceanic and 

 warm-water hyperiids in some numbers, but it is only on the rarest occasions that 

 any of them encroach more than a few miles on to the shelf within the limits of the 

 gulf, nor are any of them known from within Georges and Browns Banks (p. 56). 

 For the sake of completeness, such records as have been obtained within the geo- 

 graphic limits of the present study since 1912 are listed below 91 (for earlier records 

 for New England waters, see Holmes, 1905). 



• For records between the latitudes of New York and Chesapeake Bay during that summer see Bigelow, 1915, p. 279. 



t Previously listed in Bigelow, 1917, p. 289. 



» For descriptions and an account oi the general distribution of these hyperiids on the high ;eas see Bovalhus, 188, to 1899. 



