FOEAMINIFEKA OF NOKTH PACIFIC OCEAN. 



11 



with a little xylol and then the glue dissolved by water. By turning 

 the specimen over and repeating the process a thin section may be 

 obtained, which may then be mounted permanently. By tins means 

 the arrangement of chambers in the interior of a test may be studied, 

 even when they may be entirely hidden in an ordinary external view. 



HISTORICAL. 



The North Pacific Ocean as a whole has received less attention, 

 except from the United States vessels, than any of the great ocean 



a 



U. S. National Museum 



No. i%SS*S 





F 1 



b ^ 



B 



a 



V. S. National Museum 



No. 13 6? 'S 



b C 





9 *?' 9 



Fig. A.— Thick slide, a, surface view; 6, side view, showing grooved 



END FOR FITTING INTO SLIDE BOX. 



Fig. B.— Thin slide, a, surface view; 6, side view. 



basins. The idea has been prevalent that it was largely avast red- 

 clay area of great depth. This was mainly a result of the voyage of 

 the CJiallenger, which certainly did follow a course leading over such 

 a portion of the bottom. On the whole, the generalization is true 

 that the ocean bed of the North Pacific is a great red-clay area. In 

 spite of this fact, there are, as was shown by the work of the Nero, 

 considerable areas of globigerina ooze containing abundant Forami- 

 nifera. As the aim in the present work is to include all records for 



