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 zodlogical forms 
on the floor of the ocean. 
