TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 3 



of their life. However, there are exceptions. For example, in certain 

 species, such as Cibicides lobatulus (Walker and Jacob) or Eponides 

 repandus (Fichtel and Moll), one finds some specimens showing clear 

 evidence of attachment and others whose shape suggests they lived 

 as free individuals on the bottom. 



In general, more attached Foraminifera are to be expected in rela- 

 tively shallow water than in deep water. This is not to imply that 

 deeper waters (down to the maximum depths at which Foraminifera 

 occur) are free of attached specimens. Wherever the surface of the 

 sea floor is rocky, affording a foothold for attached individuals, some 

 would likely be found. 



Unlike the method used in the first three parts, wherein a separate 

 table is included for each species to show the number of specimens from 

 each station, as well as the locality, depth, temperature, and character 

 of the bottom, respectively, I have presented the distribution and 

 abundance data in five tables. The records of the benthonic species 

 for all the samples studied are combined in tables 1-4. In instances 

 where a sample consists of one or very few species, such as Apotaki 

 with only Amphistegina madagascariensis, the sample is included 

 on each of the four tables although on one or more no species are re- 

 corded from it. The records of the planktonic species from all the 

 samples in which they were found are included on table 5. 



The numbers on the tables indicate the actual numbers of specimens 

 mounted from each station. The designation 10 + , indicating that 

 more than 10 were mounted, is not precisely quantitative, but only 

 approximately so, because sizes of original samples from which the 

 specimens were picked varied from sample to sample. This method 

 of indicating relative abundance is followed in this fourth part in 

 order that the results may be comparable with those presented in the 

 first three parts. 



The arrangement of the samples in the tables is for convenience in 

 locating a given sample. The unnumbered samples, all from rela- 

 tively shallow depths (none greater than 50 fathoms) and all from near 

 islands or atolls, are listed first in order from east to west. The num- 

 bered dredging samples (prefixed by D) follow in numerical order, and 

 finally the numbered hydrographic samples (prefixed by H) in nu- 

 merical order. The numbered samples are all from greater depths 

 (ranging from 112 to 2,882 fathoms) than the unnumbered ones, but 

 many of the numbered samples are close to (offshore from) islands or 

 atolls as may be observed by reference to the complete dredging records 

 for this expedition (Townsend, 1901). Data regarding locality, depth, 

 temperature, and character of bottom for any particular Albatross 

 sample are obtainable also by reference to Townsend (1901). 



A few species included in this collection, although found in Kecent 



