EXPLORING THE FLOOR 31 



American biologist Alexander Agassiz, and the Ger- 

 man biologist Carl Chun were the most noteworthy. 



Depth fines: loo loootoAooo m. i 



Fig. 13. Ocean depths between Madeira, the Canaries, and 

 Gibraltar 



In our century deep-sea research has taken large 

 strides forward in spite of great technical difficulties. 

 The International Council for Sea Investigations, started 

 by Otto Pettersson in the early years of this century, 

 although limited in scope to seas of moderate depths 



