456 



DEPTHS OF THE OCEAN 



1 200 or 1500 miles, in accordance with the uniformity of the 

 physical conditions. As we have previously seen, uniform 

 physical conditions of a different character are met with along 

 the slopes of the Atlantic from the Wyville Thomson Ridge down 

 to south of the Canaries, the forms peculiar to this region being 

 entirely different to those inhabiting the slopes of the Norwegian 

 Sea. 



J. H. 



