INTRODUCTION. 



The present volume is the sixth and last of a series dealing with 

 the Foraminifera of the North Pacific Ocean. It contains the Foram- 

 inifera included in the family Miliolidae. The first part, issued 

 in 1910, included the families Astrorhizidae and Lituolidae; the 

 second part, issued in 1911, the family Textulariidae; the third part, 

 issued in 1913, the family Lagenidae; the fourth part, issued in 

 1914, the families Chilostomellidae, Glohigcrinidae, and Nummuli- 

 tidae; and the fifth part, issued in 1915, included the family Rotaliidae. 



Joseph Augustine Cushmax. 



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