54 COPOPODA — CENTROPAGES 



October: 56^ N. 23^ W.; 53° N. 25° W., common; 52° N. 14° 



W., not rare. 

 Norcmhpr: 51° N. 13° W., not rare. 



Temperature: 15.?, mean of 18 obs., max. 21.4, min. 7. 



Salinity: 34.24, mean of 18 obs., max. 36.25, min. 31. oi. (Only 

 such samples as contained this species abundantly considered). 



Plankton-type. Noted from the Mediterranean, Cape Finisterre, 

 the Engl. Channel, the British Islands, the North Sea, the Skagerak 

 and the coast of Norway, at least to 63° N. According to the above 

 statements it goes along the west coast af Africa, towards the Azores 

 and occurs in the summer between these Islands and the coast of 

 Europe, from whete it spreads to the Engl. Channel and advances 

 towards Iceland and the Faroe Channel. In September it reached 

 the N. of Iceland. From the Faroe Channel it procedes to the west 

 of Norway (but seems not to advance there far beyond 62° N.) and 

 into the Skagerak. It occurs abundantly, almost the whole year 

 above the coast-banks from Newfoundland towards New York. Ccntro- 

 pages typicns seems not to be a neritic form, and the low mean 

 salinity is to be accounted for by the fact that a number of the 

 calculated samples are taken from the region of the Newfoundland 

 Banks. — S. 



CENTROPAGES VIOLACEUS (Claus). 



1898 March: 6° S, 4° E.; 7° N 17° W.; 14° N. 50° W. 

 April: 34° N. 74° W. 



May: 41° N. 16° W.; 25° N. 52° W. ; 43° N. 43° W. 

 June: 36° N. 44° W. 

 July: 33° N. 74° W. 



August: Azores; 44° N. 42° W.; 34°— 38° N. 73°— 74° W. 

 September: 33° N. 16° W.; 41° N. 65° W. 

 October: Azores. 



November: 26° S. 30° W ; Azores. 

 December: Azores. 



Temperature: 22. i, mean of 22 obs., max. 27.8, min. 15. 



Salinity: 35.92, mean of 18 obs., max 36. so, min. 33. its. 



Plankton-type. Noted from the Pacific and the Mediterranean. 

 It occurs in the tropical Atlantic, in May and August somewhat 

 north of 40° — 1). 



