THE FORAMINIFERA OF THE TROPICAL PACIFIC 

 COLLECTIONS OF THE "ALBATROSS," 1899-1900 



Part 1. — Astrorhizidae to Trochamminidae 



By Joseph Augustine Cushman 



Director, Cushman Laboratory for Foraminiferal Research 



Sharon, Massachusetts 



INTRODUCTION 



This paper is the first part of a work the intent of which is to 

 describe and illustrate the foraminifera of the tropical Pacific 

 collected by the United States Bureau of Fisheries steamer Albatross, 

 together with certain other related material from shallow water of 

 the same region. Parts 2 and 3 will take up in systematic order 

 the rest of the families after the Trochamminidae. 



Numerous papers deal with the shallow-water foraminifera of the 

 Indo-Pacific, but from deep water few records are available for the 

 general area except those from the Challenger expedition of 50 

 years ago. 



Two previous bulletins of the United States National Museum, 

 one on the foraminifera of the North Pacific Ocean (Bulletin 71, 

 1910-1917) and the other on the foraminifera of the Atlantic Ocean 

 (Bulletin 104, 1918-1931), are general accounts, especially of the 

 foraminifera dredged by the Albatross. These bulletins also include 

 many of the species recorded from the same areas in other pub- 

 lications. 



The collections of the Albatross made during the voyage from 

 August 26, 1899, to February 21, 1900, form the basis of the present 

 series. These were made largely in deep water, although many of 

 them were in the immediate neighborhood of oceanic islands, par- 

 ticularly the Paumotu group. Shallow-water collections made from 

 this same area have also come into my hands for study and greatly 

 supplement the fauna obtained in the deeper-water dredgings. A 

 few of the stations are in north latitude, especially those near the 

 Marshall and Ladrone Islands. The fauna treated, however, is all 

 more or less of a unit, and the fact that some forms come from north 

 of the Equator and most of them from south does not interfere with 

 the general unity of the paper. 



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