FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 61 



Diameter 0.3 to 0.5 mm. 



Distribution. — Brady records Pulvinulina exigua from five Chal- 

 lenger stations in the North Pacific depths ranging from 15 to 2,300 

 fathoms. Goes records it from a single Albatross station D3433 in 

 1,218 fathoms, rare. I have had it from Nero station 10 between 

 the Hawaiian and Midway Islands and from numerous Nero stations 

 between Guam and Yokohama ranging in depth from 859 fathoms 

 off Guam to 2,098 fathoms. As far as noted, it has usually occurred 

 as few specimens at any one station. 



PULVINULINA PAUPERATA Parker and Jones. 

 Plate 23, figs. 2, 3. 



Pulvinulina repanda, var. menardii, subvar. paupcrata Parker and Jones, 

 Philos. Trans., vol. 155, 1865, p. 395, pi. 16, figs. 50, 51. 



Pulvinulina pauperata 11. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 696, pi. 104, figs. 3-11. — Egger, Abh. kon. bay. Akad. Wiss. Miincben, 

 CI. ii, vol. 18, 1893, p. 412, pi. 17, figs. 32, 34.— Goes, Bull. Mus. Comp. Zool., 

 vol. 29, 1896, p. 77.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 330, pi. 

 74, fig. 3.— Chapman, Journ. Linn. Soc, Zoology, vol. 30, 1910, p. 423. 



Description. — Test much flattened, planospiral; peripheial margin 

 extended into a broad, flat, thin, transparent carina, occasionally 

 somewhat thickened at the margin; chambers 

 numerous, ten to fifteen in the last formed coil, 

 all visible from both sides of the test; sutures 

 depressed; chambers inflated; aperture a small 

 opening near the peripheral margin of the 

 test. 



Diameter up to 3 mm. 



Distribution. — This rather unique species seems a b 



to be rather well distributed in the North Pa- fig. ss-pulvdtolina pau- 



•n i / j , j -t perata Parker and Jones. 



cific but does not appear to be common a , SIDE VIEw; MlEW FBOM 

 at any particular stations. Brady records it periphery, (after type 

 from one Challenger station in 1,850 fathoms. ^^ BY Parkek and 

 Goes notes its occurrence at four Albatross 

 stations in the western Tropical Pacific at depths ranging from 

 770 to 1,201 fathoms. Picaglia records it from a single station just 

 north of the equator. Flint noted its occurrence at Nero station 760 

 in 1,560 fathoms between Midway Islands and Guam. I have had 

 specimens from off the Galapagos Islands Albatross D2806 in 1,379 

 fathoms and from a large number of Nero stations from Guam to 

 Yokohama, depths ranging from 1,029 to 2,278 fathoms. This 

 species varies considerably in the width of the marginal wing-like 

 carina. In its remote chambers also it differs from others of the 

 genus. 



