36 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Description. — Test free or attached, generally spherical, no definite 

 aperture: wall composed of a single layer of rather coarse sand grains, 

 rather roughly put together, cement gray or brownish. 



Diameter 1.5-4 mm. 



Distribution. — Brady records this species from but two Challenger 

 stations in the North Pacific, in 1,850 and 1,875 fathoms, west of the 

 Caroline Islands, and west of Japan. Flint records it at one Nero 

 station, No. 152, in 3,026 fathoms, east of Midway Island. I have 

 specimens from two other Nero stations, Nos. 1153 and 1315, in 



Figs. 25-28.— Psammosph^era fusca. 25, specimen composed of black volcanic sand, x 25. 26, 

 free specimen, x 20. 27, attached specimen, x40. 28, section of test, x 40. (figs. 20-28. 

 after Brady.) 



1,932 and 1,494 fathoms, near the Bonin Islands in the Western 

 Pacific. 



PSAMMOSPHiERA PARVA Flint. 



Psammosphsera parva Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 268, pi. 9, 

 fig. 1.— Rhumbler, Arch. Protistk., vol. 3, 1903, p. 242, fig. 77 (in text). 



Psammosphxra fusca (part) H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 250, pi. 18, figs. 2^4 (not 1, 5-8). 



Description. — Test free or attached, often attached to or inclosing 

 a sponge spicule, spherical, if free, or frequently with a flattened area 



