4 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Family ASTRORHIZIDAE 

 Genus RHABDAMMINA M. Sars, 1869 



RHABDAMMINA ABYSSORUM M. Sars 



There are a few very fragmentary specimens of a tubular form 

 composed of rather coarse sand grains, firmly cemented. These 

 strongly resemble broken portions of the arms of this species, and 

 are placed here provisionally. They are the only records for this 

 family in the material examined. They are from Albatross Station 

 H3T79, latitude 24° 45' N., longitude 130° 16' W., in 2,627 fathoms. 



Family REOPHACIDAE 

 Genus REOPHAX Mont fort, 1808 



REOPHAX AGGLUTINATUS Cushman 



Plate 1, Figuees 1-3 



Reophax agglutinatus Cushman, Proc. U. S. Nat. Mus., vol. 44, p. 637, pi. 79, 

 fig. 6, 1913 ; U. S. Nat. Mus. Bull. 104, pt. 2, p. 9, pi. 2, figs. 4 ; 5, 1920 ; U. S. 

 Nat. Mus. Bull. 100, vol. 4, p. 73, pi. 14, figs. 2 a, b, 1921. 



Test composed of a series of pyriform chambers with a thin chiti- 

 nous lining and the exterior composed of tests of other foraminifera 

 firmly cemented ; aperture extended into a narrow, cylindrical neck. 



There are in the Albatross collections a number of specimens, some 

 of which are figured here. These are composed of young tests of 

 nearly uniform size neatly cemented. A few of the specimens simi- 

 lar to that shown in Plate 1, Figure 1, are evidently the initial cham- 

 bers of this form. Although the stations are somewhat widely dis- 

 tant from one another, the specimens are all very uniform in char- 

 acter. They have been referred to this species, which in other locali- 

 ties seems to lack the uniformity in the size of the tests that com- 

 pose the wall. 



1 Key to abbreviations is given in Table 1. 



