BOTTOM OF THE NORTH ATLANTIC MACKAY. 67 



may be an illustration of the manner in which some of the 

 fertile fields of our present continents have to some extent been 

 built up. 



It is hoped that a large series of such dredgings from exactly 

 noted points in the Atlantic may be obtained for examination, 

 An extensive series of such dredgings might throw much light 

 on the ocean currents and some geological problems, as well as 

 extend our knowledge of the distribution of zoological forms 

 on the floor of the ocean. 



