GENERAL BIOLOGY 



665 



We have seen that the upper Hmit for Cyclothone ^nicrodon 

 and the red crustaceans, in the northern section from Newfound- 

 land to Ireland, or about lat. 50° N., was approximately 500 

 metres below the surface, and we have also noticed that the 

 limit of depth for the same forms at the southernmost stations, 

 or about lat. ■^■^^ N., was some 200-300 metres deeper. In the 

 Norwegian Sea I have previously investigated the intermediate 



490. 



-Vertical distribution of black-coloured Pelagic Fishes. 



pelagic fauna, and found pelagic red prawns as well as the dark- 

 red fish, Sebastes norvegictts, at depths of about 200 metres 

 below the surface. Sebastes was taken, for instance, with float- 

 ing long lines in considerable quantities on a course from Jan 

 Mayen to Lofoten — that is to say, in about lat. 67° N., — at a 

 depth of 200 metres, and it was found, though in decreasing 

 quantities, in even less depths. Along the Norwegian coast, in 

 the fjords and sounds, we have a particularly rich fauna of red 

 crustaceans (especially Pandalus borealis), occupying depths 



