COPEPODA 



35 



By Deichmann 3 f ? + 5 (V) were taken as far north as 7537 L,. N. and 64o L,. W. As the 

 Danish East Greenland Expedition from the coastal waters only took the species in the few above 

 mentioned samples, and as not one was found in 13 surface samples (F. 244 262) taken from 9/ 7 >7/ 7 in the 



sea north-west and west of Jan Mayen, and as not one was collected in 47 samples (F. 265 310) taken 

 on the voyage home from 3/ 8 ^/ 9 between Forblasfjord and 67 L. N. 23 L,. W., there is reason to suggest 

 that the species was not very common in the mentioned period. 



Distribution. This species has its main area of distribution in the North-Polar Basin, (but has at 

 the present only been found as far east as 136 L. E.), where its propagation probably takes place; it is 

 found at the surface as well as in the lower layers. In the waters, which connect the polar seas, it is equally 

 found viz. the Bering Strait (von Bremen), the Barents Sea, the Davis Strait (Ingolf Expedition, 

 Vanhoffen and Stephensen in Karajakfjord), but especially in the ocean between Spitsbergen and 

 the east coast of Greenland. It was here found from the surface or 510 met below it, when there 

 was floating ice, down to about 1000 meters. Probably carried by the north polar current it was found 

 in the North Sea, but generally in small numbers and in the lower layers. The area around Iceland 

 in which it occurs in abundance ''coincides almost exactly with the path of the east polar current 

 and takes the form of a broad tongue passing in a south-easterly direction between Iceland and Jan 

 Mayen and reaching almost as far as the Faeroes" (Far ran p. 89). By the south-going bottom current 

 it is probably carried over the Wyville Thomson's and the Iceland-Faeroe ridges, and is accordingly 

 found scantily in the deeper layers of the North Atlantic as far south as 54 L. N. on the west coast 

 of Ireland. By the assistance of the Labrador- and the Kuro-Sivo currents the species is probably in a 

 similar way distributed over the West-Atlantic and the Pacific. In the Skager Rak and the deep fjords at 

 the west coast of Norway it is sometimes found abundantly, according to Sars, as a relict fauna. If 

 he is right, it should be possible to find it in propagation here. It should be interesting to know, if 

 the species in the deep Atlantic is sometimes propagating, or if the stock must be renewed. The 

 temperature under which this species is found abundantly, lies between -f- 1-9 and -)- 6-0, the salinity 

 between 33-15 %o and 35-18 %o About the details in the biology and distribution of this species I refer 

 to the papers of Farran and Damas-Koef oed. 



Remarks. This species is in the three last stages easily distinguished from Cal.finmarchicus. 

 But the distinction in the earlier stages, in which the difference is only found in the size etc., may, 

 as pointed out by Damas & Koefoed, be very difficult if not impossible, especially in the polar sea, 

 where Cal.finmarchicus attains a size of 5 mm. or more. 



