PELAGIC ANIMAL LIFE 657 



From a study of the list on pp. 654-5 we note the follow- 

 ing points : — 



(i) A certain number of genuine warm-water forms occur 

 only in the upper hauls (200 to o metres) in the southern 

 stations (50 and 63), such as : Eucalanus attemmhis, Euchceta 

 marina, Euchirella brevis, Haloptilus vmn'onatus, Scolecithrix 

 dancE, Acartia dams, Candace, Copilia, Sapphirina. 



(2) Some Atlantic deep-sea forms do not occur at the 

 surface either in the Sargasso Sea or along our northern track ; 

 they do not enter the Norwegian Sea and are consequently 

 distributed like the Atlantic bathypelagic fauna. Such are : 

 Amallophora affinis, Augaptihts squamatus, Phyllopus bidentahis, 

 Bathyp07itia minor. 



(3) Some forms have a large vertical range in warm waters, 

 like Calamis gracilis and Plcuromma gracilis. 



(4) Other forms have a large vertical range in the southern 

 as well as in the northern stations, like Eucalanus elongatus 

 (see Stations 50, 63, 80, and 92). 



(5) A peculiar group is composed of forms having at the 

 boreal stations a large vertical range, but occurring at the 

 warm southern stations only in deep water such as : Calamis 

 Jinmarchicus (Stations 80 and 113 at all depths); Euchceta 

 noruegica (Stations 80 and 113 at all depths, Station 92 only 

 between 1000 and 500 metres, also, according to Nordgaard, 

 Station 64, in 1250 metres, Station 62 in 1000 metres) ; Metridia 

 longa (Stations 80 and 113 in all hauls); Psetidocalanus 

 elongatus (Station 80 at all depths) ; Scolecithricella 7ninor 

 (Station 80 at all depths) ; Hetcrorhabdus non^egicus (Station 

 92 at all depths, and in deep water at Stations 50, 63, 80 and 

 113). All these forms occur in the Greenland Sea, where they 

 also have a large vertical distribution (Damas and Koefoed). 



(6) Certain forms recorded only from the deep hauls at 

 Stations 80 and 113, where the temperature is lowest, such as 

 EuchcBta barbata, E.glacialis, Calajms kyperboreus, Amallophora 

 magna. None of these occur in deep water at Stations 50 and 

 63, but, according to Nordgaard, Calamis kyperboreus and 

 Euchceta barbata have both been taken at Station 62 in the 

 Sargasso Sea in a horizontal haul at 1000 metres in great 

 numbers, 65 specimens of Calamis hyperbo^^eus being counted 

 in a small part of the sample. These forms belong to the 

 Arctic region in the Norwegian Sea, where according to Damas 

 and Koefoed they are also deep-sea forms, except the surface 

 species Calamis kyperboreus. 



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