62 EXPLANATION OF PLATES. 



Fig. 2. Station 746. 2,788 fathoms. Diatom Ooze. 



Segment of valve of Coscinodiscus rex Wallich. 



Magnified 180 diameters. 

 Fig. 3. Station 746. 2,788 fathoms. Diatom Ooze. 



Portion of band connecting the valves of Coscinodiscus rex Wallich. 



Magnified 180 diameters. 



Plate VI. 

 Diagram of the survey. 



Plate VII. 

 Track chart, Hawaiian Islands to Midway Islands. 



Plate VIII. 

 Contour chart, Hawaiian Islands to Midway Islands. 



Plate IX. 

 Track chart, Midway Islands to G.uam. 



Plate X. 

 Contour chart, Midway Islands to Guam. 



Plate XI. 

 Track chart, Guam to Luzon. 



Plate XIL 

 Contour chart, Guam to Luzon. 



Plate XIII. 

 Track chart, Guam to Yokohama. 



Plate XIV 

 Contour chart, Guam to Yokohama. 



o 



