THE FORAMINIFERA OF THE TROPICAL PACIFIC 

 COLLECTIONS OF THE "ALBATROSS," 1899-1900 



Part 3. — Heterohelicidae and Buliminidae 



By Joseph Augustine Cushman 



INTRODUCTION 



This paper is the third part of a work the intent of which is to de- 

 scribe and illustrate the Foraminifera of the tropical Pacific collected 

 by the United States Bureau of Fisheries steamer Albatross, tosrether 

 with certain other related material from shallow water of the same 

 region. Part 4 wUl complete the work and will take up in systematic 

 order the families beginning with the Rotaliidae. Readers are referred 

 to Part 1, p. 3, for a map showing the general route of the Albatross 

 tlirough the South Pacific. 



Some interesting relationships have been noted m these faunas in 

 which are living representatives of species known hitherto only from 

 the late Tertiary of other regions. The number of distinctive species 

 in this area is large, which is not surprising when the remoteness from 

 other shallow-water material is taken into consideration and also the 

 very small amount of work that has been done on the deeper-water 

 deposits of the Pacific region. 



Table 1. — Abbreviations used in the tables in this report to denote the character of 



the bottoms of the stations 



