In 1951, the Danish oceanographic ship GALATHEA dredged various 

 invertebrates from a depth of 33,433 feet in the Philippine Trench and a 

 year later caught fish at a depth of 23,400 feet. 



Deacon. G. E. R. (Ed.) 



Seas, Maps, and Men, Doubleday and Company, 1962. 

 Piccard, Jacques, and Robert S. Dietz 



Seven Miles Down, G. P. Putnam's Sons, 1961. 

 Soule, Gardner 



The Ocean Adventure, Appleton-Century, 1966. 



54 



