40 Mindeskrift for J. Steenstrup. XXX. 



Brede Fjord thus forms in hydrographical regards a contrast to the above- 

 mentioned "cold" fjords: the reason for this must certainly be, that the mouth of 

 Brede Fjord is so deep, that it allows a direct inflow of the warm water-layers from 

 the Davis Strait, whilst the "cold" fjords in West Greenland are separated by 

 barriers from the warm water in the Davis Strait '). 



As main result of the above considerations we can thus state, that the distribu- 

 tion of the Selachians mentioned is not at all determined by the geographical latitude, 

 but is in the closest connection with the bottom-temperature. 



') For the hydrogra|ihy of West (Jireenland cf. the preliminary report of tlie hydrographer 

 of the "Tjalfe" Expedition, Dr. J. N. Nielsen, published in: Beretninger og Kundgorelser ved- 

 rorende Kolonierne i Gronland, 1909, No. 2, pp. 24 — 27 and No. 5, pp. 34— 3iS. 



