644 DEPTHS OF THE OCEAN chap. 



SCOPELID^ 



Mydophum g/acia/e, 4 or 5 specimens in one hundred years. 

 Myctophum elongatiim, shoals observed during certain periods in the Trondhjem 

 fjord. 



SCOMBRESOCID^ 



Scombresox saurus (skipper or saury pike), found now and again as far as Finmark. 

 Exocoetiis voliians (flying-fish), i specimen, Christiania fjord. 



Clupeidte 



Clupea pilchardiis (sardine), since 1871 no specimen on record. 



Clupea a/osa, 30 specimens. 



Clupea finta, 10 specimens recorded. 



Engraulis encrasichohcs (anchovy), insignificant numbers. 



Syngnathid^ 

 N^erophis cequoreus, sporadic, as far as Tromso. 



MOLID/E 



Mola mola (sunfish), stranded now and again ; in Christiania fjord 20 specimens 

 since the 'seventies. 



Besides these several southern sharks have been found, 

 for instance, the blue shark {Carcharias glaucus), which, how- 

 ever, is rare. Petromyzon marimis, which we took in the 

 surface waters off the banks of Newfoundland, has been found 

 up to Finmark. 



These carefully gathered records show that many Atlantic 

 fishes occur in the Norwegian seas only as very rare visitors, 

 and seldom in great quantities. That these fishes are scarce 

 is shown by the fact that in all the hauls made by the " Michael 

 Sars " in the Norwegian Sea only Myctophun glaciale and 

 Nerophis were observed. On the other hand interesting 

 information as to the occurrence of Atlantic invertebrates has 

 been gathered. 



This list of Atlantic fish from the Norwegian Sea is of 

 general interest because none of the species recorded are 

 known to live in the deep region of the Atlantic below 500 

 metres, but are forms belonging either to the surface layers, 

 or silvery forms from the " intermediate " layers about 300 

 metres. The Sternoptychidae and the Trachypteridae belong 

 to the latter, while the others are typical surface forms. Not 

 a single Cyclothone has as yet been captured in the Norwegian 

 Sea. 



Boreal animal In the Norwegian Sea the boreal region is essentially 



communities, lin^ite^j by f^g prcscncc of arctic water, which in the Greenland 



