2 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



probably belong to described species not present in adult form, or pos- 

 sibly to undescribed ones, it is much better to wait until additional 

 material shall be available before assigning such material to definite 

 names. 



In these arenaceous forms which, in part at least, use the materials 

 from the bottom on which they live to form the test, there must be a 

 considerable variation as bottom materials change. In some of the 

 species we have attempted to illustrate examples of this varied test 

 material. Being the most primitive group of the foraminifera it is not 

 surprising that there is considerable variation in different characters, 

 although it is perhaps most noteworthy that the characters of a species 

 are so definitely held. 



It is interesting to find that many of the species found along the 

 Eastern Pacific in cold waters are similar to or identical with those 

 described from the Arctic and Antarctic regions. Others are known as 

 yet only from the Eastern Pacific but it is to be expected that their 

 range will be extended by later explorations. 



Collections upon which this report is based are a part of the collec- 

 tions of the Allan Hancock Foundation, The University of Southern 

 California, Los Angeles. The official abbreviation is AHF used in the 

 numbering of all specimens, including the holotypes and paratypes. 



Paratypes of the new species will be deposited at Smithsonian Insti- 

 tution, Washington, D.C., and at Cushman Laboratory for Foraminif- 

 eral Research, Sharon, Mass. 



